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SubjectRevert "aio: fix aio request leak when events are reaped by user space"
Some testing I've done today indicates that the original commit broke
AIO with regard to users that overflow the maximum number of request
per IO context (where -EAGAIN is returned).

In fact, it did worse - the attached C program can easily overrun the
ring buffer that is responsible for managing the completed requests,
and caused notification about their completion never to be returned.

See attachments to this mail:

aio_bug.c: a program that helps to reproduce the probelm
dmesg-bad.txt: fs/aio.c with dynamic printk on v3.15.10.
The printks show how the ring buffer gets overrun.
dmesg-good.txt: fs/aio.c with dynamic printk on a kernel with the
commit reverted.

For this program to work, we need enough events coming from io_submit()
in one go so that the ring buffer overflows. Local file system should
support O_DIRECT and it seems to test here correctly on a laptop with
an SSD.

I am not an expert on this code, but it looks perhaps that the reason
that put_reqs_available() was called in the original context was to
prevent this scenario exactly, and to properly manage the maximum
number of outstanding requests.

This reverts commit b34e0e1319b31202eb142dcd9688cf7145a30bf6.

Signed-off-by: Dan Aloni <dan@kernelim.com>

---
fs/aio.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/aio.c b/fs/aio.c
index 6d68e01dc7ca..45b07e8a1834 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -1028,7 +1028,6 @@ void aio_complete(struct kiocb *iocb, long res, long res2)

/* everything turned out well, dispose of the aiocb. */
kiocb_free(iocb);
- put_reqs_available(ctx, 1);

/*
* We have to order our ring_info tail store above and test
@@ -1111,6 +1110,8 @@ static long aio_read_events_ring(struct kioctx *ctx,
flush_dcache_page(ctx->ring_pages[0]);

pr_debug("%li h%u t%u\n", ret, head, tail);
+
+ put_reqs_available(ctx, ret);
out:
mutex_unlock(&ctx->ring_lock);

--
1.9.3
--
Dan Aloni
[ 2966.641825] aio_setup_ring: pid(9966) page[0]->count=3
[ 2966.641829] aio_setup_ring: attempting mmap of 4096 bytes
[ 2966.641834] aio_setup_ring: mmap address: 0x7ff021605000
[ 2966.641837] ioctx_alloc: allocated ioctx ffff8800c85fc000[140669328838656]: mm=ffff8801f7f5ec00 mask=0x7f
[ 2966.642645] aio_complete: ffff8800c85fc000[1]: ffff8801f7e5a280: 0000000000603cc0 0 1000 0
[ 2966.642647] aio_complete: added to ring ffff8801f7e5a280 at [1]
[ 2966.642650] aio_complete: ffff8800c85fc000[2]: ffff8801f7e5a280: 0000000000603d00 0 1000 0
[ 2966.642651] aio_complete: added to ring ffff8801f7e5a280 at [2]
[ 2966.642654] aio_complete: ffff8800c85fc000[3]: ffff8801f7e5a280: 0000000000603d40 0 1000 0
[ 2966.642655] aio_complete: added to ring ffff8801f7e5a280 at [3]
[ 2966.642657] aio_complete: ffff8800c85fc000[4]: ffff8801f7e5a280: 0000000000603d80 0 1000 0
[ 2966.642658] aio_complete: added to ring ffff8801f7e5a280 at [4]
[ 2966.642661] aio_complete: ffff8800c85fc000[5]: ffff8801f7e5a280: 0000000000603dc0 0 1000 0
[ 2966.642662] aio_complete: added to ring ffff8801f7e5a280 at [5]
[ 2966.642664] aio_complete: ffff8800c85fc000[6]: ffff8801f7e5a280: 0000000000603e00 0 1000 0
[ 2966.642665] aio_complete: added to ring ffff8801f7e5a280 at [6]
[ 2966.642668] aio_complete: ffff8800c85fc000[7]: ffff8801f7e5a280: 0000000000603e40 0 1000 0
[ 2966.642670] aio_complete: added to ring ffff8801f7e5a280 at [7]
[ 2966.642676] aio_complete: ffff8800c85fc000[8]: ffff8801f7e5a280: 0000000000603e80 0 1000 0
[ 2966.642677] aio_complete: added to ring ffff8801f7e5a280 at [8]
[ 2966.642680] aio_complete: ffff8800c85fc000[9]: ffff8801f7e5a280: 0000000000603ec0 0 1000 0
[ 2966.642680] aio_complete: added to ring ffff8801f7e5a280 at [9]
[ 2966.642683] aio_complete: ffff8800c85fc000[10]: ffff8801f7e5a280: 0000000000603f00 0 1000 0
[ 2966.642684] aio_complete: added to ring ffff8801f7e5a280 at [10]
[ 2966.642686] aio_complete: ffff8800c85fc000[11]: ffff8801f7e5a280: 0000000000603f40 0 1000 0
[ 2966.642687] aio_complete: added to ring ffff8801f7e5a280 at [11]
[ 2966.642690] aio_complete: ffff8800c85fc000[12]: ffff8801f7e5a280: 0000000000603f80 0 1000 0
[ 2966.642691] aio_complete: added to ring ffff8801f7e5a280 at [12]
[ 2966.642693] aio_complete: ffff8800c85fc000[13]: ffff8801f7e5a280: 0000000000603fc0 0 1000 0
[ 2966.642694] aio_complete: added to ring ffff8801f7e5a280 at [13]
[ 2966.642697] aio_complete: ffff8800c85fc000[14]: ffff8801f7e5a280: 0000000000604000 0 1000 0
[ 2966.642698] aio_complete: added to ring ffff8801f7e5a280 at [14]
[ 2966.642700] aio_complete: ffff8800c85fc000[15]: ffff8801f7e5a280: 0000000000604040 0 1000 0
[ 2966.642701] aio_complete: added to ring ffff8801f7e5a280 at [15]
[ 2966.642704] aio_complete: ffff8800c85fc000[16]: ffff8801f7e5a280: 0000000000604080 0 1000 0
[ 2966.642704] aio_complete: added to ring ffff8801f7e5a280 at [16]
[ 2966.642707] aio_complete: ffff8800c85fc000[17]: ffff8801f7e5a280: 00000000006040c0 0 1000 0
[ 2966.642708] aio_complete: added to ring ffff8801f7e5a280 at [17]
[ 2966.642710] aio_complete: ffff8800c85fc000[18]: ffff8801f7e5a280: 0000000000604100 0 1000 0
[ 2966.642711] aio_complete: added to ring ffff8801f7e5a280 at [18]
[ 2966.642714] aio_complete: ffff8800c85fc000[19]: ffff8801f7e5a280: 0000000000604140 0 1000 0
[ 2966.642715] aio_complete: added to ring ffff8801f7e5a280 at [19]
[ 2966.642717] aio_complete: ffff8800c85fc000[20]: ffff8801f7e5a280: 0000000000604180 0 1000 0
[ 2966.642718] aio_complete: added to ring ffff8801f7e5a280 at [20]
[ 2966.642720] aio_complete: ffff8800c85fc000[21]: ffff8801f7e5a280: 00000000006041c0 0 1000 0
[ 2966.642721] aio_complete: added to ring ffff8801f7e5a280 at [21]
[ 2966.642725] aio_complete: ffff8800c85fc000[22]: ffff8801f7e5a280: 0000000000604200 0 1000 0
[ 2966.642725] aio_complete: added to ring ffff8801f7e5a280 at [22]
[ 2966.642728] aio_complete: ffff8800c85fc000[23]: ffff8801f7e5a280: 0000000000604240 0 1000 0
[ 2966.642729] aio_complete: added to ring ffff8801f7e5a280 at [23]
[ 2966.642731] aio_complete: ffff8800c85fc000[24]: ffff8801f7e5a280: 0000000000604280 0 1000 0
[ 2966.642732] aio_complete: added to ring ffff8801f7e5a280 at [24]
[ 2966.642735] aio_complete: ffff8800c85fc000[25]: ffff8801f7e5a280: 00000000006042c0 0 1000 0
[ 2966.642735] aio_complete: added to ring ffff8801f7e5a280 at [25]
[ 2966.642738] aio_complete: ffff8800c85fc000[26]: ffff8801f7e5a280: 0000000000604300 0 1000 0
[ 2966.642739] aio_complete: added to ring ffff8801f7e5a280 at [26]
[ 2966.642741] aio_complete: ffff8800c85fc000[27]: ffff8801f7e5a280: 0000000000604340 0 1000 0
[ 2966.642742] aio_complete: added to ring ffff8801f7e5a280 at [27]
[ 2966.642745] aio_complete: ffff8800c85fc000[28]: ffff8801f7e5a280: 0000000000604380 0 1000 0
[ 2966.642745] aio_complete: added to ring ffff8801f7e5a280 at [28]
[ 2966.642748] aio_complete: ffff8800c85fc000[29]: ffff8801f7e5a280: 00000000006043c0 0 1000 0
[ 2966.642749] aio_complete: added to ring ffff8801f7e5a280 at [29]
[ 2966.642751] aio_complete: ffff8800c85fc000[30]: ffff8801f7e5a280: 0000000000604400 0 1000 0
[ 2966.642752] aio_complete: added to ring ffff8801f7e5a280 at [30]
[ 2966.642755] aio_complete: ffff8800c85fc000[31]: ffff8801f7e5a280: 0000000000604440 0 1000 0
[ 2966.642756] aio_complete: added to ring ffff8801f7e5a280 at [31]
[ 2966.642758] aio_complete: ffff8800c85fc000[32]: ffff8801f7e5a280: 0000000000604480 0 1000 0
[ 2966.642759] aio_complete: added to ring ffff8801f7e5a280 at [32]
[ 2966.642761] aio_complete: ffff8800c85fc000[33]: ffff8801f7e5a280: 00000000006044c0 0 1000 0
[ 2966.642762] aio_complete: added to ring ffff8801f7e5a280 at [33]
[ 2966.642765] aio_complete: ffff8800c85fc000[34]: ffff8801f7e5a280: 0000000000604500 0 1000 0
[ 2966.642766] aio_complete: added to ring ffff8801f7e5a280 at [34]
[ 2966.642768] aio_complete: ffff8800c85fc000[35]: ffff8801f7e5a280: 0000000000604540 0 1000 0
[ 2966.642769] aio_complete: added to ring ffff8801f7e5a280 at [35]
[ 2966.642772] aio_complete: ffff8800c85fc000[36]: ffff8801f7e5a280: 0000000000604580 0 1000 0
[ 2966.642773] aio_complete: added to ring ffff8801f7e5a280 at [36]
[ 2966.642775] aio_complete: ffff8800c85fc000[37]: ffff8801f7e5a280: 00000000006045c0 0 1000 0
[ 2966.642776] aio_complete: added to ring ffff8801f7e5a280 at [37]
[ 2966.642779] aio_complete: ffff8800c85fc000[38]: ffff8801f7e5a280: 0000000000604600 0 1000 0
[ 2966.642780] aio_complete: added to ring ffff8801f7e5a280 at [38]
[ 2966.642784] aio_complete: ffff8800c85fc000[39]: ffff8801f7e5a280: 0000000000604640 0 1000 0
[ 2966.642785] aio_complete: added to ring ffff8801f7e5a280 at [39]
[ 2966.642787] aio_complete: ffff8800c85fc000[40]: ffff8801f7e5a280: 0000000000604680 0 1000 0
[ 2966.642788] aio_complete: added to ring ffff8801f7e5a280 at [40]
[ 2966.642791] aio_complete: ffff8800c85fc000[41]: ffff8801f7e5a280: 00000000006046c0 0 1000 0
[ 2966.642792] aio_complete: added to ring ffff8801f7e5a280 at [41]
[ 2966.642794] aio_complete: ffff8800c85fc000[42]: ffff8801f7e5a280: 0000000000604700 0 1000 0
[ 2966.642795] aio_complete: added to ring ffff8801f7e5a280 at [42]
[ 2966.642797] aio_complete: ffff8800c85fc000[43]: ffff8801f7e5a280: 0000000000604740 0 1000 0
[ 2966.642798] aio_complete: added to ring ffff8801f7e5a280 at [43]
[ 2966.642801] aio_complete: ffff8800c85fc000[44]: ffff8801f7e5a280: 0000000000604780 0 1000 0
[ 2966.642802] aio_complete: added to ring ffff8801f7e5a280 at [44]
[ 2966.642804] aio_complete: ffff8800c85fc000[45]: ffff8801f7e5a280: 00000000006047c0 0 1000 0
[ 2966.642805] aio_complete: added to ring ffff8801f7e5a280 at [45]
[ 2966.642807] aio_complete: ffff8800c85fc000[46]: ffff8801f7e5a280: 0000000000604800 0 1000 0
[ 2966.642808] aio_complete: added to ring ffff8801f7e5a280 at [46]
[ 2966.642811] aio_complete: ffff8800c85fc000[47]: ffff8801f7e5a280: 0000000000604840 0 1000 0
[ 2966.642812] aio_complete: added to ring ffff8801f7e5a280 at [47]
[ 2966.642814] aio_complete: ffff8800c85fc000[48]: ffff8801f7e5a280: 0000000000604880 0 1000 0
[ 2966.642815] aio_complete: added to ring ffff8801f7e5a280 at [48]
[ 2966.642818] aio_complete: ffff8800c85fc000[49]: ffff8801f7e5a280: 00000000006048c0 0 1000 0
[ 2966.642819] aio_complete: added to ring ffff8801f7e5a280 at [49]
[ 2966.642822] aio_complete: ffff8800c85fc000[50]: ffff8801f7e5a280: 0000000000604900 0 1000 0
[ 2966.642823] aio_complete: added to ring ffff8801f7e5a280 at [50]
[ 2966.642825] aio_complete: ffff8800c85fc000[51]: ffff8801f7e5a280: 0000000000604940 0 1000 0
[ 2966.642826] aio_complete: added to ring ffff8801f7e5a280 at [51]
[ 2966.642828] aio_complete: ffff8800c85fc000[52]: ffff8801f7e5a280: 0000000000604980 0 1000 0
[ 2966.642829] aio_complete: added to ring ffff8801f7e5a280 at [52]
[ 2966.642832] aio_complete: ffff8800c85fc000[53]: ffff8801f7e5a280: 00000000006049c0 0 1000 0
[ 2966.642833] aio_complete: added to ring ffff8801f7e5a280 at [53]
[ 2966.642835] aio_complete: ffff8800c85fc000[54]: ffff8801f7e5a280: 0000000000604a00 0 1000 0
[ 2966.642836] aio_complete: added to ring ffff8801f7e5a280 at [54]
[ 2966.642838] aio_complete: ffff8800c85fc000[55]: ffff8801f7e5a280: 0000000000604a40 0 1000 0
[ 2966.642839] aio_complete: added to ring ffff8801f7e5a280 at [55]
[ 2966.642842] aio_complete: ffff8800c85fc000[56]: ffff8801f7e5a280: 0000000000604a80 0 1000 0
[ 2966.642843] aio_complete: added to ring ffff8801f7e5a280 at [56]
[ 2966.642845] aio_complete: ffff8800c85fc000[57]: ffff8801f7e5a280: 0000000000604ac0 0 1000 0
[ 2966.642846] aio_complete: added to ring ffff8801f7e5a280 at [57]
[ 2966.642849] aio_complete: ffff8800c85fc000[58]: ffff8801f7e5a280: 0000000000604b00 0 1000 0
[ 2966.642849] aio_complete: added to ring ffff8801f7e5a280 at [58]
[ 2966.642852] aio_complete: ffff8800c85fc000[59]: ffff8801f7e5a280: 0000000000604b40 0 1000 0
[ 2966.642853] aio_complete: added to ring ffff8801f7e5a280 at [59]
[ 2966.642855] aio_complete: ffff8800c85fc000[60]: ffff8801f7e5a280: 0000000000604b80 0 1000 0
[ 2966.642856] aio_complete: added to ring ffff8801f7e5a280 at [60]
[ 2966.642859] aio_complete: ffff8800c85fc000[61]: ffff8801f7e5a280: 0000000000604bc0 0 1000 0
[ 2966.642860] aio_complete: added to ring ffff8801f7e5a280 at [61]
[ 2966.642862] aio_complete: ffff8800c85fc000[62]: ffff8801f7e5a280: 0000000000604c00 0 1000 0
[ 2966.642863] aio_complete: added to ring ffff8801f7e5a280 at [62]
[ 2966.642865] aio_complete: ffff8800c85fc000[63]: ffff8801f7e5a280: 0000000000604c40 0 1000 0
[ 2966.642866] aio_complete: added to ring ffff8801f7e5a280 at [63]
[ 2966.642869] aio_complete: ffff8800c85fc000[64]: ffff8801f7e5a280: 0000000000604c80 0 1000 0
[ 2966.642870] aio_complete: added to ring ffff8801f7e5a280 at [64]
[ 2966.642873] aio_complete: ffff8800c85fc000[65]: ffff8801f7e5a280: 0000000000604cc0 0 1000 0
[ 2966.642874] aio_complete: added to ring ffff8801f7e5a280 at [65]
[ 2966.642876] aio_complete: ffff8800c85fc000[66]: ffff8801f7e5a280: 0000000000604d00 0 1000 0
[ 2966.642877] aio_complete: added to ring ffff8801f7e5a280 at [66]
[ 2966.642879] aio_complete: ffff8800c85fc000[67]: ffff8801f7e5a280: 0000000000604d40 0 1000 0
[ 2966.642880] aio_complete: added to ring ffff8801f7e5a280 at [67]
[ 2966.642883] aio_complete: ffff8800c85fc000[68]: ffff8801f7e5a280: 0000000000604d80 0 1000 0
[ 2966.642884] aio_complete: added to ring ffff8801f7e5a280 at [68]
[ 2966.642886] aio_complete: ffff8800c85fc000[69]: ffff8801f7e5a280: 0000000000604dc0 0 1000 0
[ 2966.642887] aio_complete: added to ring ffff8801f7e5a280 at [69]
[ 2966.642891] aio_complete: ffff8800c85fc000[70]: ffff8801f7e5a280: 0000000000604e00 0 1000 0
[ 2966.642892] aio_complete: added to ring ffff8801f7e5a280 at [70]
[ 2966.642894] aio_complete: ffff8800c85fc000[71]: ffff8801f7e5a280: 0000000000604e40 0 1000 0
[ 2966.642895] aio_complete: added to ring ffff8801f7e5a280 at [71]
[ 2966.642898] aio_complete: ffff8800c85fc000[72]: ffff8801f7e5a280: 0000000000604e80 0 1000 0
[ 2966.642899] aio_complete: added to ring ffff8801f7e5a280 at [72]
[ 2966.642901] aio_complete: ffff8800c85fc000[73]: ffff8801f7e5a280: 0000000000604ec0 0 1000 0
[ 2966.642902] aio_complete: added to ring ffff8801f7e5a280 at [73]
[ 2966.642904] aio_complete: ffff8800c85fc000[74]: ffff8801f7e5a280: 0000000000604f00 0 1000 0
[ 2966.642905] aio_complete: added to ring ffff8801f7e5a280 at [74]
[ 2966.642908] aio_complete: ffff8800c85fc000[75]: ffff8801f7e5a280: 0000000000604f40 0 1000 0
[ 2966.642909] aio_complete: added to ring ffff8801f7e5a280 at [75]
[ 2966.642911] aio_complete: ffff8800c85fc000[76]: ffff8801f7e5a280: 0000000000604f80 0 1000 0
[ 2966.642912] aio_complete: added to ring ffff8801f7e5a280 at [76]
[ 2966.642914] aio_complete: ffff8800c85fc000[77]: ffff8801f7e5a280: 0000000000604fc0 0 1000 0
[ 2966.642915] aio_complete: added to ring ffff8801f7e5a280 at [77]
[ 2966.642918] aio_complete: ffff8800c85fc000[78]: ffff8801f7e5a280: 0000000000605000 0 1000 0
[ 2966.642919] aio_complete: added to ring ffff8801f7e5a280 at [78]
[ 2966.642922] aio_complete: ffff8800c85fc000[79]: ffff8801f7e5a280: 0000000000605040 0 1000 0
[ 2966.642923] aio_complete: added to ring ffff8801f7e5a280 at [79]
[ 2966.642925] aio_complete: ffff8800c85fc000[80]: ffff8801f7e5a280: 0000000000605080 0 1000 0
[ 2966.642926] aio_complete: added to ring ffff8801f7e5a280 at [80]
[ 2966.642929] aio_complete: ffff8800c85fc000[81]: ffff8801f7e5a280: 00000000006050c0 0 1000 0
[ 2966.642929] aio_complete: added to ring ffff8801f7e5a280 at [81]
[ 2966.642932] aio_complete: ffff8800c85fc000[82]: ffff8801f7e5a280: 0000000000605100 0 1000 0
[ 2966.642933] aio_complete: added to ring ffff8801f7e5a280 at [82]
[ 2966.642935] aio_complete: ffff8800c85fc000[83]: ffff8801f7e5a280: 0000000000605140 0 1000 0
[ 2966.642936] aio_complete: added to ring ffff8801f7e5a280 at [83]
[ 2966.642939] aio_complete: ffff8800c85fc000[84]: ffff8801f7e5a280: 0000000000605180 0 1000 0
[ 2966.642939] aio_complete: added to ring ffff8801f7e5a280 at [84]
[ 2966.642942] aio_complete: ffff8800c85fc000[85]: ffff8801f7e5a280: 00000000006051c0 0 1000 0
[ 2966.642943] aio_complete: added to ring ffff8801f7e5a280 at [85]
[ 2966.642945] aio_complete: ffff8800c85fc000[86]: ffff8801f7e5a280: 0000000000605200 0 1000 0
[ 2966.642946] aio_complete: added to ring ffff8801f7e5a280 at [86]
[ 2966.642949] aio_complete: ffff8800c85fc000[87]: ffff8801f7e5a280: 0000000000605240 0 1000 0
[ 2966.642950] aio_complete: added to ring ffff8801f7e5a280 at [87]
[ 2966.642952] aio_complete: ffff8800c85fc000[88]: ffff8801f7e5a280: 0000000000605280 0 1000 0
[ 2966.642953] aio_complete: added to ring ffff8801f7e5a280 at [88]
[ 2966.642955] aio_complete: ffff8800c85fc000[89]: ffff8801f7e5a280: 00000000006052c0 0 1000 0
[ 2966.642956] aio_complete: added to ring ffff8801f7e5a280 at [89]
[ 2966.642959] aio_complete: ffff8800c85fc000[90]: ffff8801f7e5a280: 0000000000605300 0 1000 0
[ 2966.642960] aio_complete: added to ring ffff8801f7e5a280 at [90]
[ 2966.642962] aio_complete: ffff8800c85fc000[91]: ffff8801f7e5a280: 0000000000605340 0 1000 0
[ 2966.642963] aio_complete: added to ring ffff8801f7e5a280 at [91]
[ 2966.642966] aio_complete: ffff8800c85fc000[92]: ffff8801f7e5a280: 0000000000605380 0 1000 0
[ 2966.642967] aio_complete: added to ring ffff8801f7e5a280 at [92]
[ 2966.642969] aio_complete: ffff8800c85fc000[93]: ffff8801f7e5a280: 00000000006053c0 0 1000 0
[ 2966.642970] aio_complete: added to ring ffff8801f7e5a280 at [93]
[ 2966.642973] aio_complete: ffff8800c85fc000[94]: ffff8801f7e5a280: 0000000000605400 0 1000 0
[ 2966.642974] aio_complete: added to ring ffff8801f7e5a280 at [94]
[ 2966.642976] aio_complete: ffff8800c85fc000[95]: ffff8801f7e5a280: 0000000000605440 0 1000 0
[ 2966.642977] aio_complete: added to ring ffff8801f7e5a280 at [95]
[ 2966.642979] aio_complete: ffff8800c85fc000[96]: ffff8801f7e5a280: 0000000000605480 0 1000 0
[ 2966.642980] aio_complete: added to ring ffff8801f7e5a280 at [96]
[ 2966.642983] aio_complete: ffff8800c85fc000[97]: ffff8801f7e5a280: 00000000006054c0 0 1000 0
[ 2966.642984] aio_complete: added to ring ffff8801f7e5a280 at [97]
[ 2966.642986] aio_complete: ffff8800c85fc000[98]: ffff8801f7e5a280: 0000000000605500 0 1000 0
[ 2966.642987] aio_complete: added to ring ffff8801f7e5a280 at [98]
[ 2966.642989] aio_complete: ffff8800c85fc000[99]: ffff8801f7e5a280: 0000000000605540 0 1000 0
[ 2966.642990] aio_complete: added to ring ffff8801f7e5a280 at [99]
[ 2966.642993] aio_complete: ffff8800c85fc000[100]: ffff8801f7e5a280: 0000000000605580 0 1000 0
[ 2966.642994] aio_complete: added to ring ffff8801f7e5a280 at [100]
[ 2966.642998] aio_complete: ffff8800c85fc000[101]: ffff8801f7e5a280: 00000000006055c0 0 1000 0
[ 2966.642998] aio_complete: added to ring ffff8801f7e5a280 at [101]
[ 2966.643001] aio_complete: ffff8800c85fc000[102]: ffff8801f7e5a280: 0000000000605600 0 1000 0
[ 2966.643002] aio_complete: added to ring ffff8801f7e5a280 at [102]
[ 2966.643004] aio_complete: ffff8800c85fc000[103]: ffff8801f7e5a280: 0000000000605640 0 1000 0
[ 2966.643005] aio_complete: added to ring ffff8801f7e5a280 at [103]
[ 2966.643008] aio_complete: ffff8800c85fc000[104]: ffff8801f7e5a280: 0000000000605680 0 1000 0
[ 2966.643009] aio_complete: added to ring ffff8801f7e5a280 at [104]
[ 2966.643011] aio_complete: ffff8800c85fc000[105]: ffff8801f7e5a280: 00000000006056c0 0 1000 0
[ 2966.643012] aio_complete: added to ring ffff8801f7e5a280 at [105]
[ 2966.643015] aio_complete: ffff8800c85fc000[106]: ffff8801f7e5a280: 0000000000605700 0 1000 0
[ 2966.643016] aio_complete: added to ring ffff8801f7e5a280 at [106]
[ 2966.643018] aio_complete: ffff8800c85fc000[107]: ffff8801f7e5a280: 0000000000605740 0 1000 0
[ 2966.643019] aio_complete: added to ring ffff8801f7e5a280 at [107]
[ 2966.643022] aio_complete: ffff8800c85fc000[108]: ffff8801f7e5a280: 0000000000605780 0 1000 0
[ 2966.643023] aio_complete: added to ring ffff8801f7e5a280 at [108]
[ 2966.643025] aio_complete: ffff8800c85fc000[109]: ffff8801f7e5a280: 00000000006057c0 0 1000 0
[ 2966.643026] aio_complete: added to ring ffff8801f7e5a280 at [109]
[ 2966.643028] aio_complete: ffff8800c85fc000[110]: ffff8801f7e5a280: 0000000000605800 0 1000 0
[ 2966.643029] aio_complete: added to ring ffff8801f7e5a280 at [110]
[ 2966.643032] aio_complete: ffff8800c85fc000[111]: ffff8801f7e5a280: 0000000000605840 0 1000 0
[ 2966.643033] aio_complete: added to ring ffff8801f7e5a280 at [111]
[ 2966.643035] aio_complete: ffff8800c85fc000[112]: ffff8801f7e5a280: 0000000000605880 0 1000 0
[ 2966.643036] aio_complete: added to ring ffff8801f7e5a280 at [112]
[ 2966.643038] aio_complete: ffff8800c85fc000[113]: ffff8801f7e5a280: 00000000006058c0 0 1000 0
[ 2966.643039] aio_complete: added to ring ffff8801f7e5a280 at [113]
[ 2966.643042] aio_complete: ffff8800c85fc000[114]: ffff8801f7e5a280: 0000000000605900 0 1000 0
[ 2966.643043] aio_complete: added to ring ffff8801f7e5a280 at [114]
[ 2966.643045] aio_complete: ffff8800c85fc000[115]: ffff8801f7e5a280: 0000000000605940 0 1000 0
[ 2966.643046] aio_complete: added to ring ffff8801f7e5a280 at [115]
[ 2966.643049] aio_complete: ffff8800c85fc000[116]: ffff8801f7e5a280: 0000000000605980 0 1000 0
[ 2966.643049] aio_complete: added to ring ffff8801f7e5a280 at [116]
[ 2966.643052] aio_complete: ffff8800c85fc000[117]: ffff8801f7e5a280: 00000000006059c0 0 1000 0
[ 2966.643053] aio_complete: added to ring ffff8801f7e5a280 at [117]
[ 2966.643055] aio_complete: ffff8800c85fc000[118]: ffff8801f7e5a280: 0000000000605a00 0 1000 0
[ 2966.643056] aio_complete: added to ring ffff8801f7e5a280 at [118]
[ 2966.643059] aio_complete: ffff8800c85fc000[119]: ffff8801f7e5a280: 0000000000605a40 0 1000 0
[ 2966.643060] aio_complete: added to ring ffff8801f7e5a280 at [119]
[ 2966.643063] aio_complete: ffff8800c85fc000[120]: ffff8801f7e5a280: 0000000000605a80 0 1000 0
[ 2966.643064] aio_complete: added to ring ffff8801f7e5a280 at [120]
[ 2966.643066] aio_complete: ffff8800c85fc000[121]: ffff8801f7e5a280: 0000000000605ac0 0 1000 0
[ 2966.643067] aio_complete: added to ring ffff8801f7e5a280 at [121]
[ 2966.643069] aio_complete: ffff8800c85fc000[122]: ffff8801f7e5a280: 0000000000605b00 0 1000 0
[ 2966.643070] aio_complete: added to ring ffff8801f7e5a280 at [122]
[ 2966.643073] aio_complete: ffff8800c85fc000[123]: ffff8801f7e5a280: 0000000000605b40 0 1000 0
[ 2966.643074] aio_complete: added to ring ffff8801f7e5a280 at [123]
[ 2966.643076] aio_complete: ffff8800c85fc000[124]: ffff8801f7e5a280: 0000000000605b80 0 1000 0
[ 2966.643077] aio_complete: added to ring ffff8801f7e5a280 at [124]
[ 2966.643079] aio_complete: ffff8800c85fc000[125]: ffff8801f7e5a280: 0000000000605bc0 0 1000 0
[ 2966.643080] aio_complete: added to ring ffff8801f7e5a280 at [125]
[ 2966.643083] aio_complete: ffff8800c85fc000[126]: ffff8801f7e5a280: 0000000000605c00 0 1000 0
[ 2966.643084] aio_complete: added to ring ffff8801f7e5a280 at [126]
[ 2966.643086] aio_complete: ffff8800c85fc000[0]: ffff8801f7e5a280: 0000000000605c40 0 1000 0
[ 2966.643087] aio_complete: added to ring ffff8801f7e5a280 at [0]
[ 2966.643089] aio_complete: ffff8800c85fc000[1]: ffff8801f7e5a280: 0000000000605c80 0 1000 0
[ 2966.643090] aio_complete: added to ring ffff8801f7e5a280 at [1]
[ 2966.643147] aio_read_events_ring: h0 t1 m127
[ 2966.643149] aio_read_events_ring: 1 h1 t1
[ 2966.643150] aio_read_events_ring: h1 t1 m127
[ 2966.699376] aio_read_events_ring: h0 t0 m511
[ 2966.699386] aio_read_events_ring: h0 t0 m511
[ 2966.699389] aio_read_events_ring: h0 t0 m511
[ 2966.799574] aio_read_events_ring: h0 t0 m511
[ 3048.065378] aio_setup_ring: pid(1025) page[0]->count=3
[ 3048.065380] aio_setup_ring: attempting mmap of 4096 bytes
[ 3048.065382] aio_setup_ring: mmap address: 0x7f6cae9aa000
[ 3048.065383] ioctx_alloc: allocated ioctx ffff8800b6e4b200[140104762564608]: mm=ffff8800b6da9000 mask=0x7f
[ 3048.065556] aio_complete: ffff8800b6e4b200[1]: ffff8800b6786e00: 0000000000603cc0 0 1000 0
[ 3048.065558] aio_complete: added to ring ffff8800b6786e00 at [1]
[ 3048.065561] aio_complete: ffff8800b6e4b200[2]: ffff8800b6786e00: 0000000000603d00 0 1000 0
[ 3048.065562] aio_complete: added to ring ffff8800b6786e00 at [2]
[ 3048.065565] aio_complete: ffff8800b6e4b200[3]: ffff8800b6786e00: 0000000000603d40 0 1000 0
[ 3048.065566] aio_complete: added to ring ffff8800b6786e00 at [3]
[ 3048.065569] aio_complete: ffff8800b6e4b200[4]: ffff8800b6786e00: 0000000000603d80 0 1000 0
[ 3048.065570] aio_complete: added to ring ffff8800b6786e00 at [4]
[ 3048.065573] aio_complete: ffff8800b6e4b200[5]: ffff8800b6786e00: 0000000000603dc0 0 1000 0
[ 3048.065574] aio_complete: added to ring ffff8800b6786e00 at [5]
[ 3048.065591] aio_complete: ffff8800b6e4b200[6]: ffff8800b6786e00: 0000000000603e00 0 1000 0
[ 3048.065595] aio_complete: added to ring ffff8800b6786e00 at [6]
[ 3048.065602] aio_complete: ffff8800b6e4b200[7]: ffff8800b6786e00: 0000000000603e40 0 1000 0
[ 3048.065603] aio_complete: added to ring ffff8800b6786e00 at [7]
[ 3048.065607] aio_complete: ffff8800b6e4b200[8]: ffff8800b6786e00: 0000000000603e80 0 1000 0
[ 3048.065608] aio_complete: added to ring ffff8800b6786e00 at [8]
[ 3048.065611] aio_complete: ffff8800b6e4b200[9]: ffff8800b6786e00: 0000000000603ec0 0 1000 0
[ 3048.065612] aio_complete: added to ring ffff8800b6786e00 at [9]
[ 3048.065615] aio_complete: ffff8800b6e4b200[10]: ffff8800b6786e00: 0000000000603f00 0 1000 0
[ 3048.065616] aio_complete: added to ring ffff8800b6786e00 at [10]
[ 3048.065619] aio_complete: ffff8800b6e4b200[11]: ffff8800b6786e00: 0000000000603f40 0 1000 0
[ 3048.065620] aio_complete: added to ring ffff8800b6786e00 at [11]
[ 3048.065623] aio_complete: ffff8800b6e4b200[12]: ffff8800b6786e00: 0000000000603f80 0 1000 0
[ 3048.065623] aio_complete: added to ring ffff8800b6786e00 at [12]
[ 3048.065626] aio_complete: ffff8800b6e4b200[13]: ffff8800b6786e00: 0000000000603fc0 0 1000 0
[ 3048.065627] aio_complete: added to ring ffff8800b6786e00 at [13]
[ 3048.065631] aio_complete: ffff8800b6e4b200[14]: ffff8800b6786e00: 0000000000604000 0 1000 0
[ 3048.065632] aio_complete: added to ring ffff8800b6786e00 at [14]
[ 3048.065635] aio_complete: ffff8800b6e4b200[15]: ffff8800b6786e00: 0000000000604040 0 1000 0
[ 3048.065635] aio_complete: added to ring ffff8800b6786e00 at [15]
[ 3048.065638] aio_complete: ffff8800b6e4b200[16]: ffff8800b6786e00: 0000000000604080 0 1000 0
[ 3048.065639] aio_complete: added to ring ffff8800b6786e00 at [16]
[ 3048.065642] aio_complete: ffff8800b6e4b200[17]: ffff8800b6786e00: 00000000006040c0 0 1000 0
[ 3048.065643] aio_complete: added to ring ffff8800b6786e00 at [17]
[ 3048.065646] aio_complete: ffff8800b6e4b200[18]: ffff8800b6786e00: 0000000000604100 0 1000 0
[ 3048.065647] aio_complete: added to ring ffff8800b6786e00 at [18]
[ 3048.065650] aio_complete: ffff8800b6e4b200[19]: ffff8800b6786e00: 0000000000604140 0 1000 0
[ 3048.065651] aio_complete: added to ring ffff8800b6786e00 at [19]
[ 3048.065654] aio_complete: ffff8800b6e4b200[20]: ffff8800b6786e00: 0000000000604180 0 1000 0
[ 3048.065655] aio_complete: added to ring ffff8800b6786e00 at [20]
[ 3048.065658] aio_complete: ffff8800b6e4b200[21]: ffff8800b6786e00: 00000000006041c0 0 1000 0
[ 3048.065659] aio_complete: added to ring ffff8800b6786e00 at [21]
[ 3048.065663] aio_complete: ffff8800b6e4b200[22]: ffff8800b6786e00: 0000000000604200 0 1000 0
[ 3048.065664] aio_complete: added to ring ffff8800b6786e00 at [22]
[ 3048.065668] aio_complete: ffff8800b6e4b200[23]: ffff8800b6786e00: 0000000000604240 0 1000 0
[ 3048.065669] aio_complete: added to ring ffff8800b6786e00 at [23]
[ 3048.065672] aio_complete: ffff8800b6e4b200[24]: ffff8800b6786e00: 0000000000604280 0 1000 0
[ 3048.065672] aio_complete: added to ring ffff8800b6786e00 at [24]
[ 3048.065676] aio_complete: ffff8800b6e4b200[25]: ffff8800b6786e00: 00000000006042c0 0 1000 0
[ 3048.065677] aio_complete: added to ring ffff8800b6786e00 at [25]
[ 3048.065680] aio_complete: ffff8800b6e4b200[26]: ffff8800b6786e00: 0000000000604300 0 1000 0
[ 3048.065681] aio_complete: added to ring ffff8800b6786e00 at [26]
[ 3048.065690] aio_complete: ffff8800b6e4b200[27]: ffff8800b6786e00: 0000000000604340 0 1000 0
[ 3048.065691] aio_complete: added to ring ffff8800b6786e00 at [27]
[ 3048.065694] aio_complete: ffff8800b6e4b200[28]: ffff8800b6786e00: 0000000000604380 0 1000 0
[ 3048.065694] aio_complete: added to ring ffff8800b6786e00 at [28]
[ 3048.065697] aio_complete: ffff8800b6e4b200[29]: ffff8800b6786e00: 00000000006043c0 0 1000 0
[ 3048.065715] aio_complete: added to ring ffff8800b6786e00 at [29]
[ 3048.065721] aio_complete: ffff8800b6e4b200[30]: ffff8800b6786e00: 0000000000604400 0 1000 0
[ 3048.065722] aio_complete: added to ring ffff8800b6786e00 at [30]
[ 3048.065736] aio_complete: ffff8800b6e4b200[31]: ffff8800b6786e00: 0000000000604440 0 1000 0
[ 3048.065738] aio_complete: added to ring ffff8800b6786e00 at [31]
[ 3048.065744] aio_complete: ffff8800b6e4b200[32]: ffff8800b6786e00: 0000000000604480 0 1000 0
[ 3048.065745] aio_complete: added to ring ffff8800b6786e00 at [32]
[ 3048.065748] aio_complete: ffff8800b6e4b200[33]: ffff8800b6786e00: 00000000006044c0 0 1000 0
[ 3048.065749] aio_complete: added to ring ffff8800b6786e00 at [33]
[ 3048.065761] aio_complete: ffff8800b6e4b200[34]: ffff8800b6786e00: 0000000000604500 0 1000 0
[ 3048.065762] aio_complete: added to ring ffff8800b6786e00 at [34]
[ 3048.065765] aio_complete: ffff8800b6e4b200[35]: ffff8800b6786e00: 0000000000604540 0 1000 0
[ 3048.065765] aio_complete: added to ring ffff8800b6786e00 at [35]
[ 3048.065770] aio_complete: ffff8800b6e4b200[36]: ffff8800b6786e00: 0000000000604580 0 1000 0
[ 3048.065771] aio_complete: added to ring ffff8800b6786e00 at [36]
[ 3048.065773] aio_complete: ffff8800b6e4b200[37]: ffff8800b6786e00: 00000000006045c0 0 1000 0
[ 3048.065774] aio_complete: added to ring ffff8800b6786e00 at [37]
[ 3048.065777] aio_complete: ffff8800b6e4b200[38]: ffff8800b6786e00: 0000000000604600 0 1000 0
[ 3048.065778] aio_complete: added to ring ffff8800b6786e00 at [38]
[ 3048.065781] aio_complete: ffff8800b6e4b200[39]: ffff8800b6786e00: 0000000000604640 0 1000 0
[ 3048.065782] aio_complete: added to ring ffff8800b6786e00 at [39]
[ 3048.065785] aio_complete: ffff8800b6e4b200[40]: ffff8800b6786e00: 0000000000604680 0 1000 0
[ 3048.065786] aio_complete: added to ring ffff8800b6786e00 at [40]
[ 3048.065789] aio_complete: ffff8800b6e4b200[41]: ffff8800b6786e00: 00000000006046c0 0 1000 0
[ 3048.065790] aio_complete: added to ring ffff8800b6786e00 at [41]
[ 3048.065793] aio_complete: ffff8800b6e4b200[42]: ffff8800b6786e00: 0000000000604700 0 1000 0
[ 3048.065794] aio_complete: added to ring ffff8800b6786e00 at [42]
[ 3048.065797] aio_complete: ffff8800b6e4b200[43]: ffff8800b6786e00: 0000000000604740 0 1000 0
[ 3048.065798] aio_complete: added to ring ffff8800b6786e00 at [43]
[ 3048.065801] aio_complete: ffff8800b6e4b200[44]: ffff8800b6786e00: 0000000000604780 0 1000 0
[ 3048.065802] aio_complete: added to ring ffff8800b6786e00 at [44]
[ 3048.065805] aio_complete: ffff8800b6e4b200[45]: ffff8800b6786e00: 00000000006047c0 0 1000 0
[ 3048.065806] aio_complete: added to ring ffff8800b6786e00 at [45]
[ 3048.065809] aio_complete: ffff8800b6e4b200[46]: ffff8800b6786e00: 0000000000604800 0 1000 0
[ 3048.065809] aio_complete: added to ring ffff8800b6786e00 at [46]
[ 3048.065812] aio_complete: ffff8800b6e4b200[47]: ffff8800b6786e00: 0000000000604840 0 1000 0
[ 3048.065813] aio_complete: added to ring ffff8800b6786e00 at [47]
[ 3048.065816] aio_complete: ffff8800b6e4b200[48]: ffff8800b6786e00: 0000000000604880 0 1000 0
[ 3048.065817] aio_complete: added to ring ffff8800b6786e00 at [48]
[ 3048.065820] aio_complete: ffff8800b6e4b200[49]: ffff8800b6786e00: 00000000006048c0 0 1000 0
[ 3048.065820] aio_complete: added to ring ffff8800b6786e00 at [49]
[ 3048.065824] aio_complete: ffff8800b6e4b200[50]: ffff8800b6786e00: 0000000000604900 0 1000 0
[ 3048.065825] aio_complete: added to ring ffff8800b6786e00 at [50]
[ 3048.065827] aio_complete: ffff8800b6e4b200[51]: ffff8800b6786e00: 0000000000604940 0 1000 0
[ 3048.065828] aio_complete: added to ring ffff8800b6786e00 at [51]
[ 3048.065831] aio_complete: ffff8800b6e4b200[52]: ffff8800b6786e00: 0000000000604980 0 1000 0
[ 3048.065832] aio_complete: added to ring ffff8800b6786e00 at [52]
[ 3048.065834] aio_complete: ffff8800b6e4b200[53]: ffff8800b6786e00: 00000000006049c0 0 1000 0
[ 3048.065835] aio_complete: added to ring ffff8800b6786e00 at [53]
[ 3048.065838] aio_complete: ffff8800b6e4b200[54]: ffff8800b6786e00: 0000000000604a00 0 1000 0
[ 3048.065839] aio_complete: added to ring ffff8800b6786e00 at [54]
[ 3048.065842] aio_complete: ffff8800b6e4b200[55]: ffff8800b6786e00: 0000000000604a40 0 1000 0
[ 3048.065843] aio_complete: added to ring ffff8800b6786e00 at [55]
[ 3048.065858] aio_complete: ffff8800b6e4b200[56]: ffff8800b6786e00: 0000000000604a80 0 1000 0
[ 3048.065860] aio_complete: added to ring ffff8800b6786e00 at [56]
[ 3048.065865] aio_complete: ffff8800b6e4b200[57]: ffff8800b6786e00: 0000000000604ac0 0 1000 0
[ 3048.065866] aio_complete: added to ring ffff8800b6786e00 at [57]
[ 3048.065870] aio_complete: ffff8800b6e4b200[58]: ffff8800b6786e00: 0000000000604b00 0 1000 0
[ 3048.065870] aio_complete: added to ring ffff8800b6786e00 at [58]
[ 3048.065873] aio_complete: ffff8800b6e4b200[59]: ffff8800b6786e00: 0000000000604b40 0 1000 0
[ 3048.065874] aio_complete: added to ring ffff8800b6786e00 at [59]
[ 3048.065877] aio_complete: ffff8800b6e4b200[60]: ffff8800b6786e00: 0000000000604b80 0 1000 0
[ 3048.065878] aio_complete: added to ring ffff8800b6786e00 at [60]
[ 3048.065881] aio_complete: ffff8800b6e4b200[61]: ffff8800b6786e00: 0000000000604bc0 0 1000 0
[ 3048.065882] aio_complete: added to ring ffff8800b6786e00 at [61]
[ 3048.065884] aio_complete: ffff8800b6e4b200[62]: ffff8800b6786e00: 0000000000604c00 0 1000 0
[ 3048.065885] aio_complete: added to ring ffff8800b6786e00 at [62]
[ 3048.065888] aio_complete: ffff8800b6e4b200[63]: ffff8800b6786e00: 0000000000604c40 0 1000 0
[ 3048.065889] aio_complete: added to ring ffff8800b6786e00 at [63]
[ 3048.065893] aio_complete: ffff8800b6e4b200[64]: ffff8800b6786e00: 0000000000604c80 0 1000 0
[ 3048.065894] aio_complete: added to ring ffff8800b6786e00 at [64]
[ 3048.066254] aio_complete: ffff8800b6e4b200[65]: ffff8800b6786e00: 0000000000604cc0 0 1000 0
[ 3048.066258] aio_complete: added to ring ffff8800b6786e00 at [65]
[ 3048.066269] aio_complete: ffff8800b6e4b200[66]: ffff8800b6786e00: 0000000000604d00 0 1000 0
[ 3048.066274] aio_complete: added to ring ffff8800b6786e00 at [66]
[ 3048.066284] aio_complete: ffff8800b6e4b200[67]: ffff8800b6786e00: 0000000000604d40 0 1000 0
[ 3048.066287] aio_complete: added to ring ffff8800b6786e00 at [67]
[ 3048.066298] aio_complete: ffff8800b6e4b200[68]: ffff8800b6786e00: 0000000000604d80 0 1000 0
[ 3048.066301] aio_complete: added to ring ffff8800b6786e00 at [68]
[ 3048.066312] aio_complete: ffff8800b6e4b200[69]: ffff8800b6786e00: 0000000000604dc0 0 1000 0
[ 3048.066315] aio_complete: added to ring ffff8800b6786e00 at [69]
[ 3048.066326] aio_complete: ffff8800b6e4b200[70]: ffff8800b6786e00: 0000000000604e00 0 1000 0
[ 3048.066329] aio_complete: added to ring ffff8800b6786e00 at [70]
[ 3048.066340] aio_complete: ffff8800b6e4b200[71]: ffff8800b6786e00: 0000000000604e40 0 1000 0
[ 3048.066343] aio_complete: added to ring ffff8800b6786e00 at [71]
[ 3048.066354] aio_complete: ffff8800b6e4b200[72]: ffff8800b6786e00: 0000000000604e80 0 1000 0
[ 3048.066357] aio_complete: added to ring ffff8800b6786e00 at [72]
[ 3048.066370] aio_complete: ffff8800b6e4b200[73]: ffff8800b6786e00: 0000000000604ec0 0 1000 0
[ 3048.066373] aio_complete: added to ring ffff8800b6786e00 at [73]
[ 3048.066383] aio_complete: ffff8800b6e4b200[74]: ffff8800b6786e00: 0000000000604f00 0 1000 0
[ 3048.066387] aio_complete: added to ring ffff8800b6786e00 at [74]
[ 3048.066398] aio_complete: ffff8800b6e4b200[75]: ffff8800b6786e00: 0000000000604f40 0 1000 0
[ 3048.066401] aio_complete: added to ring ffff8800b6786e00 at [75]
[ 3048.066412] aio_complete: ffff8800b6e4b200[76]: ffff8800b6786e00: 0000000000604f80 0 1000 0
[ 3048.066416] aio_complete: added to ring ffff8800b6786e00 at [76]
[ 3048.066426] aio_complete: ffff8800b6e4b200[77]: ffff8800b6786e00: 0000000000604fc0 0 1000 0
[ 3048.066432] aio_complete: added to ring ffff8800b6786e00 at [77]
[ 3048.066446] aio_complete: ffff8800b6e4b200[78]: ffff8800b6786e00: 0000000000605000 0 1000 0
[ 3048.066449] aio_complete: added to ring ffff8800b6786e00 at [78]
[ 3048.066460] aio_complete: ffff8800b6e4b200[79]: ffff8800b6786e00: 0000000000605040 0 1000 0
[ 3048.066463] aio_complete: added to ring ffff8800b6786e00 at [79]
[ 3048.066474] aio_complete: ffff8800b6e4b200[80]: ffff8800b6786e00: 0000000000605080 0 1000 0
[ 3048.066477] aio_complete: added to ring ffff8800b6786e00 at [80]
[ 3048.066488] aio_complete: ffff8800b6e4b200[81]: ffff8800b6786e00: 00000000006050c0 0 1000 0
[ 3048.066492] aio_complete: added to ring ffff8800b6786e00 at [81]
[ 3048.066502] aio_complete: ffff8800b6e4b200[82]: ffff8800b6786e00: 0000000000605100 0 1000 0
[ 3048.066507] aio_complete: added to ring ffff8800b6786e00 at [82]
[ 3048.066518] aio_complete: ffff8800b6e4b200[83]: ffff8800b6786e00: 0000000000605140 0 1000 0
[ 3048.066521] aio_complete: added to ring ffff8800b6786e00 at [83]
[ 3048.066532] aio_complete: ffff8800b6e4b200[84]: ffff8800b6786e00: 0000000000605180 0 1000 0
[ 3048.066536] aio_complete: added to ring ffff8800b6786e00 at [84]
[ 3048.066547] aio_complete: ffff8800b6e4b200[85]: ffff8800b6786e00: 00000000006051c0 0 1000 0
[ 3048.066550] aio_complete: added to ring ffff8800b6786e00 at [85]
[ 3048.066561] aio_complete: ffff8800b6e4b200[86]: ffff8800b6786e00: 0000000000605200 0 1000 0
[ 3048.066565] aio_complete: added to ring ffff8800b6786e00 at [86]
[ 3048.066576] aio_complete: ffff8800b6e4b200[87]: ffff8800b6786e00: 0000000000605240 0 1000 0
[ 3048.066579] aio_complete: added to ring ffff8800b6786e00 at [87]
[ 3048.066590] aio_complete: ffff8800b6e4b200[88]: ffff8800b6786e00: 0000000000605280 0 1000 0
[ 3048.066594] aio_complete: added to ring ffff8800b6786e00 at [88]
[ 3048.066605] aio_complete: ffff8800b6e4b200[89]: ffff8800b6786e00: 00000000006052c0 0 1000 0
[ 3048.066608] aio_complete: added to ring ffff8800b6786e00 at [89]
[ 3048.066619] aio_complete: ffff8800b6e4b200[90]: ffff8800b6786e00: 0000000000605300 0 1000 0
[ 3048.066623] aio_complete: added to ring ffff8800b6786e00 at [90]
[ 3048.066633] aio_complete: ffff8800b6e4b200[91]: ffff8800b6786e00: 0000000000605340 0 1000 0
[ 3048.066638] aio_complete: added to ring ffff8800b6786e00 at [91]
[ 3048.066652] aio_complete: ffff8800b6e4b200[92]: ffff8800b6786e00: 0000000000605380 0 1000 0
[ 3048.066655] aio_complete: added to ring ffff8800b6786e00 at [92]
[ 3048.066666] aio_complete: ffff8800b6e4b200[93]: ffff8800b6786e00: 00000000006053c0 0 1000 0
[ 3048.066670] aio_complete: added to ring ffff8800b6786e00 at [93]
[ 3048.066681] aio_complete: ffff8800b6e4b200[94]: ffff8800b6786e00: 0000000000605400 0 1000 0
[ 3048.066684] aio_complete: added to ring ffff8800b6786e00 at [94]
[ 3048.066696] aio_complete: ffff8800b6e4b200[95]: ffff8800b6786e00: 0000000000605440 0 1000 0
[ 3048.066699] aio_complete: added to ring ffff8800b6786e00 at [95]
[ 3048.066716] aio_complete: ffff8800b6e4b200[96]: ffff8800b6786e00: 0000000000605480 0 1000 0
[ 3048.066720] aio_complete: added to ring ffff8800b6786e00 at [96]
[ 3048.066731] aio_complete: ffff8800b6e4b200[97]: ffff8800b6786e00: 00000000006054c0 0 1000 0
[ 3048.066734] aio_complete: added to ring ffff8800b6786e00 at [97]
[ 3048.066745] aio_complete: ffff8800b6e4b200[98]: ffff8800b6786e00: 0000000000605500 0 1000 0
[ 3048.066750] aio_complete: added to ring ffff8800b6786e00 at [98]
[ 3048.066761] aio_complete: ffff8800b6e4b200[99]: ffff8800b6786e00: 0000000000605540 0 1000 0
[ 3048.066764] aio_complete: added to ring ffff8800b6786e00 at [99]
[ 3048.066775] aio_complete: ffff8800b6e4b200[100]: ffff8800b6786e00: 0000000000605580 0 1000 0
[ 3048.066779] aio_complete: added to ring ffff8800b6786e00 at [100]
[ 3048.066790] aio_complete: ffff8800b6e4b200[101]: ffff8800b6786e00: 00000000006055c0 0 1000 0
[ 3048.066794] aio_complete: added to ring ffff8800b6786e00 at [101]
[ 3048.066805] aio_complete: ffff8800b6e4b200[102]: ffff8800b6786e00: 0000000000605600 0 1000 0
[ 3048.066808] aio_complete: added to ring ffff8800b6786e00 at [102]
[ 3048.066820] aio_complete: ffff8800b6e4b200[103]: ffff8800b6786e00: 0000000000605640 0 1000 0
[ 3048.066823] aio_complete: added to ring ffff8800b6786e00 at [103]
[ 3048.066834] aio_complete: ffff8800b6e4b200[104]: ffff8800b6786e00: 0000000000605680 0 1000 0
[ 3048.066837] aio_complete: added to ring ffff8800b6786e00 at [104]
[ 3048.066848] aio_complete: ffff8800b6e4b200[105]: ffff8800b6786e00: 00000000006056c0 0 1000 0
[ 3048.067233] aio_complete: added to ring ffff8800b6786e00 at [105]
[ 3048.067850] aio_complete: ffff8800b6e4b200[106]: ffff8800b6786e00: 0000000000605700 0 1000 0
[ 3048.067855] aio_complete: added to ring ffff8800b6786e00 at [106]
[ 3048.067868] aio_complete: ffff8800b6e4b200[107]: ffff8800b6786e00: 0000000000605740 0 1000 0
[ 3048.067872] aio_complete: added to ring ffff8800b6786e00 at [107]
[ 3048.067883] aio_complete: ffff8800b6e4b200[108]: ffff8800b6786e00: 0000000000605780 0 1000 0
[ 3048.067886] aio_complete: added to ring ffff8800b6786e00 at [108]
[ 3048.067897] aio_complete: ffff8800b6e4b200[109]: ffff8800b6786e00: 00000000006057c0 0 1000 0
[ 3048.067901] aio_complete: added to ring ffff8800b6786e00 at [109]
[ 3048.067911] aio_complete: ffff8800b6e4b200[110]: ffff8800b6786e00: 0000000000605800 0 1000 0
[ 3048.067915] aio_complete: added to ring ffff8800b6786e00 at [110]
[ 3048.067926] aio_complete: ffff8800b6e4b200[111]: ffff8800b6786e00: 0000000000605840 0 1000 0
[ 3048.067930] aio_complete: added to ring ffff8800b6786e00 at [111]
[ 3048.067941] aio_complete: ffff8800b6e4b200[112]: ffff8800b6786e00: 0000000000605880 0 1000 0
[ 3048.067956] aio_complete: added to ring ffff8800b6786e00 at [112]
[ 3048.067973] aio_complete: ffff8800b6e4b200[113]: ffff8800b6786e00: 00000000006058c0 0 1000 0
[ 3048.067983] aio_complete: added to ring ffff8800b6786e00 at [113]
[ 3048.068000] aio_complete: ffff8800b6e4b200[114]: ffff8800b6786e00: 0000000000605900 0 1000 0
[ 3048.068010] aio_complete: added to ring ffff8800b6786e00 at [114]
[ 3048.068266] aio_complete: ffff8800b6e4b200[115]: ffff8800b6786e00: 0000000000605940 0 1000 0
[ 3048.068275] aio_complete: added to ring ffff8800b6786e00 at [115]
[ 3048.068292] aio_complete: ffff8800b6e4b200[116]: ffff8800b6786e00: 0000000000605980 0 1000 0
[ 3048.068301] aio_complete: added to ring ffff8800b6786e00 at [116]
[ 3048.068320] aio_complete: ffff8800b6e4b200[117]: ffff8800b6786e00: 00000000006059c0 0 1000 0
[ 3048.068323] aio_complete: added to ring ffff8800b6786e00 at [117]
[ 3048.068334] aio_complete: ffff8800b6e4b200[118]: ffff8800b6786e00: 0000000000605a00 0 1000 0
[ 3048.068337] aio_complete: added to ring ffff8800b6786e00 at [118]
[ 3048.068348] aio_complete: ffff8800b6e4b200[119]: ffff8800b6786e00: 0000000000605a40 0 1000 0
[ 3048.068351] aio_complete: added to ring ffff8800b6786e00 at [119]
[ 3048.068366] aio_complete: ffff8800b6e4b200[120]: ffff8800b6786e00: 0000000000605a80 0 1000 0
[ 3048.068370] aio_complete: added to ring ffff8800b6786e00 at [120]
[ 3048.068381] aio_complete: ffff8800b6e4b200[121]: ffff8800b6786e00: 0000000000605ac0 0 1000 0
[ 3048.068384] aio_complete: added to ring ffff8800b6786e00 at [121]
[ 3048.068395] aio_complete: ffff8800b6e4b200[122]: ffff8800b6786e00: 0000000000605b00 0 1000 0
[ 3048.068399] aio_complete: added to ring ffff8800b6786e00 at [122]
[ 3048.068410] aio_complete: ffff8800b6e4b200[123]: ffff8800b6786e00: 0000000000605b40 0 1000 0
[ 3048.068414] aio_complete: added to ring ffff8800b6786e00 at [123]
[ 3048.068436] aio_complete: ffff8800b6e4b200[124]: ffff8800b6786e00: 0000000000605b80 0 1000 0
[ 3048.068444] aio_complete: added to ring ffff8800b6786e00 at [124]
[ 3048.068462] aio_complete: ffff8800b6e4b200[125]: ffff8800b6786e00: 0000000000605bc0 0 1000 0
[ 3048.068472] aio_complete: added to ring ffff8800b6786e00 at [125]
[ 3048.068489] aio_complete: ffff8800b6e4b200[126]: ffff8800b6786e00: 0000000000605c00 0 1000 0
[ 3048.068498] aio_complete: added to ring ffff8800b6786e00 at [126]
[ 3048.068658] aio_read_events_ring: h0 t126 m127
[ 3048.068664] aio_read_events_ring: 126 h126 t126
[ 3048.068717] aio_complete: ffff8800b6e4b200[0]: ffff8800b6786e00: 0000000000605c40 0 1000 0
[ 3048.068721] aio_complete: added to ring ffff8800b6786e00 at [0]
[ 3048.068733] aio_complete: ffff8800b6e4b200[1]: ffff8800b6786e00: 0000000000605c80 0 1000 0
[ 3048.068736] aio_complete: added to ring ffff8800b6786e00 at [1]
[ 3048.068757] aio_read_events_ring: h126 t1 m127
[ 3048.068761] aio_read_events_ring: 2 h1 t1
[ 3048.079517] free_ioctx: freeing ffff8800b6e4b200
[ 3048.079525] aio_free_ring: pid(1005) [0] page->count=2
/*
* aio_bug.c
*
* Copyright (C) 2014, Dan Aloni, Kernelim Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/

#include <assert.h>
#include <errno.h>
#include <libaio.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/mman.h>

#define MAX_IOS 128

const int max_events = 32;
const int io_size = 0x1000;
io_context_t io_ctx;
struct iocb io[MAX_IOS];
struct iocb *iops[MAX_IOS];
struct iovec iovecs[MAX_IOS];
struct io_event events[MAX_IOS];
char *data;

long submitted = 0;
long completed = 0;
long pending = 0;

void prune(void)
{
int ret;

ret = io_getevents(io_ctx, pending, MAX_IOS, events, NULL);
if (ret > 0) {
printf("Completed: %d\n", ret);
completed += ret;
pending -= ret;
}
}

int main(int argc, char **argv)
{
int ret;
int fd;
const char *filename = "aio_bug_temp";
long i, to_submit;
struct iocb **iocb_sub;

ret = io_setup(max_events, &io_ctx);
assert(!ret);

unlink(filename);
fd = open(filename, O_CREAT | O_RDWR | O_DIRECT, 0644);
assert(fd >= 0);

ret = ftruncate(fd, MAX_IOS * io_size);
assert(!ret);

data = mmap(NULL, io_size * MAX_IOS, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
assert(data != MAP_FAILED);

for (i = 0; i < MAX_IOS; i++) {
iops[i] = &io[i];
io[i].data = io;
iovecs[i].iov_base = &data[io_size * i];
iovecs[i].iov_len = io_size;
io_prep_preadv(&io[i], fd, &iovecs[i], 1, 0);
}

to_submit = MAX_IOS;
iocb_sub = iops;

while (submitted < MAX_IOS) {
printf("Submitting: %ld\n", to_submit);

ret = io_submit(io_ctx, to_submit, iocb_sub);
if (ret >= 0) {
printf("Submitted: %d\n", ret);
submitted += ret;
iocb_sub += ret;
pending += ret;
to_submit -= ret;
} else {
if (ret == -EAGAIN) {
printf("Submitted too much, that's okay\n");
prune();
}
}
}

prune();
io_destroy(io_ctx);

close(fd);

printf("Verifying...\n");

assert(completed == submitted);

printf("OK\n");

return 0;
}

/*
*
* Good output:
*
* Submitting: 128
* Submitted: 126
* Submitting: 2
* Submitted too much, that's okay
* Completed: 126
* Submitting: 2
* Submitted: 2
* Completed: 2
* Verifying...
* OK
*
* Bad output:
*
* Submitting: 128
* Submitted: 128
* <program stuck, IO/s swallowed>
*
*/
\
 
 \ /
  Last update: 2014-08-19 19:21    [W:0.173 / U:0.412 seconds]
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