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SubjectRe: Kernel falls apart under light memory pressure (i.e. linking vmlinux)
On Thu, May 19, 2011 at 10:16 AM, Andrew Lutomirski <luto@mit.edu> wrote:
> I just booted 2.6.38.6 with exactly two patches applied.  Config was
> the same as I emailed yesterday.  Userspace is F15.  First was
> "aesni-intel: Merge with fpu.ko" because dracut fails to boot my
> system without it.  Second was this (sorry for whitespace damage):
>
> diff --git a/mm/vmscan.c b/mm/vmscan.c
> index 0665520..3f44b81 100644
> --- a/mm/vmscan.c
> +++ b/mm/vmscan.c
> @@ -307,7 +307,7 @@ static void set_reclaim_mode(int priority, struct
> scan_control *sc,
>         */
>        if (sc->order > PAGE_ALLOC_COSTLY_ORDER)
>                sc->reclaim_mode |= syncmode;
> -       else if (sc->order && priority < DEF_PRIORITY - 2)
> +       else if ((sc->order && priority < DEF_PRIORITY - 2) ||
> priority <= DEF_PRIORITY / 3)
>                sc->reclaim_mode |= syncmode;
>        else
>                sc->reclaim_mode = RECLAIM_MODE_SINGLE | RECLAIM_MODE_ASYNC;
> @@ -1342,10 +1342,6 @@ static inline bool
> should_reclaim_stall(unsigned long nr_taken,
>        if (current_is_kswapd())
>                return false;
>
> -       /* Only stall on lumpy reclaim */
> -       if (sc->reclaim_mode & RECLAIM_MODE_SINGLE)
> -               return false;
> -
>        /* If we have relaimed everything on the isolated list, no stall */
>        if (nr_freed == nr_taken)
>                return false;
>
> I started GNOME and Firefox, enabled swap, and ran test_mempressure.sh
> 1500 1400 1.  The system quickly gave the attached oops.
>

I haven't applied Minchan's latest patch yet, but given the OOPS it
seems like the root cause might be something other than kswapd not
going sleep. So I applied this additional patch:

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 3f44b81..1beea0f 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -729,7 +729,15 @@ static unsigned long shrink_page_list(struct
list_head *page_list,
if (!trylock_page(page))
goto keep;

- VM_BUG_ON(PageActive(page));
+ if (PageActive(page)) {
+ printk(KERN_ERR "shrink_page_list
(nr_scanned=%lu nr_reclaimed=%lu nr_to_reclaim=%lu gfp_mask=%X) found
inactive
+ sc->nr_scanned, sc->nr_reclaimed,
+ sc->nr_to_reclaim, sc->gfp_mask, page,
+ page->flags);
+ //VM_BUG_ON(PageActive(page));
+ msleep(1);
+ continue;
+ }
VM_BUG_ON(page_zone(page) != zone);

sc->nr_scanned++;
and saw:

[ 63.609661] Adding 6291452k swap on /dev/mapper/vg_antithesis-swap.
Priority:-1 extents:1 across:6291452k
[ 70.148767] shrink_page_list (nr_scanned=33620 nr_reclaimed=2122
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea00014220d0
with flags=100000000008005D
[ 70.148929] shrink_page_list (nr_scanned=23477 nr_reclaimed=2198
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0001423f38
with flags=100000000008005D
[ 70.150036] shrink_page_list (nr_scanned=33620 nr_reclaimed=2122
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0001422060
with flags=100000000008005D
[ 70.150132] shrink_page_list (nr_scanned=23507 nr_reclaimed=2198
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea00014249f0
with flags=100000000008005D
[ 70.152032] shrink_page_list (nr_scanned=23507 nr_reclaimed=2198
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0001424a28
with flags=100000000008005D
[ 70.152123] shrink_page_list (nr_scanned=33632 nr_reclaimed=2122
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea00014224c0
with flags=100000000008005D
[ 70.154027] shrink_page_list (nr_scanned=23507 nr_reclaimed=2198
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0001424a60
with flags=100000000008005D
[ 70.154180] shrink_page_list (nr_scanned=33733 nr_reclaimed=2122
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0001424bb0
with flags=100000000008005D
[ 70.156022] shrink_page_list (nr_scanned=23507 nr_reclaimed=2198
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0001424a98
with flags=100000000008005D
[ 70.156247] shrink_page_list (nr_scanned=33930 nr_reclaimed=2168
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea000125e860
with flags=100000000002004D
[ 70.158035] shrink_page_list (nr_scanned=23507 nr_reclaimed=2198
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0001424ad0
with flags=100000000008005D
[ 70.158101] shrink_page_list (nr_scanned=33930 nr_reclaimed=2168
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea000125f238
with flags=100000000002004D
[ 70.160010] shrink_page_list (nr_scanned=23507 nr_reclaimed=2198
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0001424b08
with flags=100000000008005D
[ 70.160075] shrink_page_list (nr_scanned=33930 nr_reclaimed=2168
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea000125f200
with flags=100000000002004D
[ 70.162013] shrink_page_list (nr_scanned=23507 nr_reclaimed=2198
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0001424b40
with flags=100000000008005D
[ 70.162080] shrink_page_list (nr_scanned=33930 nr_reclaimed=2168
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea000125f1c8
with flags=100000000002004D
[ 70.164015] shrink_page_list (nr_scanned=23507 nr_reclaimed=2198
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0001424b78
with flags=100000000008005D
[ 70.168859] shrink_page_list (nr_scanned=24706 nr_reclaimed=2239
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea00012ae030
with flags=1000000000080049
[ 70.168959] shrink_page_list (nr_scanned=40170 nr_reclaimed=2787
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea000125b488
with flags=100000000008005D
[ 70.170004] shrink_page_list (nr_scanned=24706 nr_reclaimed=2239
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea00012adf88
with flags=1000000000080049
[ 70.175980] shrink_page_list (nr_scanned=566 nr_reclaimed=81
nr_to_reclaim=32 gfp_mask=2005A) found inactive page ffffea0000e00f18
with flags=100000000002004D
[ 70.176140] shrink_page_list (nr_scanned=846 nr_reclaimed=94
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000df2428
with flags=100000000002004D
[ 70.176160] shrink_page_list (nr_scanned=41061 nr_reclaimed=2787
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000df29d8
with flags=100000000002004D
[ 70.176364] shrink_page_list (nr_scanned=28440 nr_reclaimed=2350
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000de9240
with flags=100000000002004D
[ 70.178086] shrink_page_list (nr_scanned=41061 nr_reclaimed=2787
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000df2a10
with flags=100000000002004D
[ 70.178161] shrink_page_list (nr_scanned=846 nr_reclaimed=94
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000df2268
with flags=100000000002004D
[ 70.178189] shrink_page_list (nr_scanned=28493 nr_reclaimed=2350
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000de92b0
with flags=100000000002004D
[ 70.178215] shrink_page_list (nr_scanned=618 nr_reclaimed=117
nr_to_reclaim=32 gfp_mask=2005A) found inactive page ffffea0000de98d0
with flags=100000000002004D
[ 70.180063] shrink_page_list (nr_scanned=618 nr_reclaimed=117
nr_to_reclaim=32 gfp_mask=2005A) found inactive page ffffea0000de9908
with flags=100000000002004D
[ 70.180081] shrink_page_list (nr_scanned=28493 nr_reclaimed=2350
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000de9320
with flags=100000000002004D
[ 70.180192] shrink_page_list (nr_scanned=897 nr_reclaimed=136
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000dea0e8
with flags=100000000002004D
[ 70.180197] shrink_page_list (nr_scanned=41119 nr_reclaimed=2787
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000deac80
with flags=100000000002004D
[ 70.182031] shrink_page_list (nr_scanned=618 nr_reclaimed=117
nr_to_reclaim=32 gfp_mask=2005A) found inactive page ffffea0000de9940
with flags=100000000002004D
[ 70.182048] shrink_page_list (nr_scanned=41119 nr_reclaimed=2787
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000deacb8
with flags=100000000002004D
[ 70.182063] shrink_page_list (nr_scanned=28493 nr_reclaimed=2350
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000de9358
with flags=100000000002004D
[ 70.182079] shrink_page_list (nr_scanned=897 nr_reclaimed=136
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000dea120
with flags=100000000002004D
[ 70.183986] shrink_page_list (nr_scanned=28493 nr_reclaimed=2350
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000de9828
with flags=100000000002004D
[ 70.183990] shrink_page_list (nr_scanned=41119 nr_reclaimed=2787
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000deacf0
with flags=100000000002004D
[ 70.183993] shrink_page_list (nr_scanned=897 nr_reclaimed=136
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000dea158
with flags=100000000002004D
[ 70.185982] shrink_page_list (nr_scanned=897 nr_reclaimed=136
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000dea190
with flags=100000000002004D
[ 70.185986] shrink_page_list (nr_scanned=41119 nr_reclaimed=2787
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000deadd0
with flags=100000000002004D
[ 70.186117] shrink_page_list (nr_scanned=28621 nr_reclaimed=2382
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000da5118
with flags=100000000002004D
[ 70.187991] shrink_page_list (nr_scanned=897 nr_reclaimed=136
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000dea1c8
with flags=100000000002004D
[ 70.187994] shrink_page_list (nr_scanned=41119 nr_reclaimed=2787
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000deae40
with flags=100000000002004D
[ 70.187998] shrink_page_list (nr_scanned=28621 nr_reclaimed=2382
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000da5348
with flags=100000000002004D
[ 70.189977] shrink_page_list (nr_scanned=28621 nr_reclaimed=2382
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000da5540
with flags=100000000002004D
[ 70.189980] shrink_page_list (nr_scanned=41119 nr_reclaimed=2787
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000deae78
with flags=100000000002004D
[ 70.190026] shrink_page_list (nr_scanned=950 nr_reclaimed=136
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000da5b98
with flags=100000000002004D
[ 70.191975] shrink_page_list (nr_scanned=41119 nr_reclaimed=2787
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000deaeb0
with flags=100000000002004D
[ 70.191982] shrink_page_list (nr_scanned=28621 nr_reclaimed=2382
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000da5578
with flags=100000000002004D
[ 70.192096] shrink_page_list (nr_scanned=1149 nr_reclaimed=170
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000da5c78
with flags=100000000002004D
[ 70.193973] shrink_page_list (nr_scanned=41119 nr_reclaimed=2787
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000deaee8
with flags=100000000002004D
[ 70.194025] shrink_page_list (nr_scanned=1213 nr_reclaimed=170
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000da5ff8
with flags=100000000002004D
[ 70.194190] shrink_page_list (nr_scanned=28849 nr_reclaimed=2414
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000da6a78
with flags=100000000002004D
[ 70.195970] shrink_page_list (nr_scanned=1213 nr_reclaimed=170
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000da6378
with flags=100000000002004D
[ 70.195981] shrink_page_list (nr_scanned=28849 nr_reclaimed=2414
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000da6ab0
with flags=100000000002004D
[ 70.196022] shrink_page_list (nr_scanned=41176 nr_reclaimed=2821
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000da7178
with flags=100000000002004D
[ 70.197975] shrink_page_list (nr_scanned=1213 nr_reclaimed=170
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000da66c0
with flags=100000000002004D
[ 70.197982] shrink_page_list (nr_scanned=28849 nr_reclaimed=2414
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000da7140
with flags=100000000002004D
[ 70.198197] shrink_page_list (nr_scanned=41527 nr_reclaimed=2920
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000daa198
with flags=100000000002004D
[ 70.199965] shrink_page_list (nr_scanned=41527 nr_reclaimed=2920
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000daa4a8
with flags=100000000002004D
[ 70.200070] shrink_page_list (nr_scanned=1341 nr_reclaimed=205
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000daaa58
with flags=100000000002004D
[ 70.200116] shrink_page_list (nr_scanned=28963 nr_reclaimed=2414
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d90188
with flags=100000000002004D
[ 70.201962] shrink_page_list (nr_scanned=1341 nr_reclaimed=205
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000daaac8
with flags=100000000002004D
[ 70.201965] shrink_page_list (nr_scanned=41527 nr_reclaimed=2920
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000daa4e0
with flags=100000000002004D
[ 70.202069] shrink_page_list (nr_scanned=29077 nr_reclaimed=2460
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d907e0
with flags=100000000002004D
[ 70.203959] shrink_page_list (nr_scanned=29077 nr_reclaimed=2460
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d90818
with flags=100000000002004D
[ 70.203964] shrink_page_list (nr_scanned=41527 nr_reclaimed=2920
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000daa630
with flags=100000000002004D
[ 70.204009] shrink_page_list (nr_scanned=1399 nr_reclaimed=205
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d90b28
with flags=100000000002004D
[ 70.205955] shrink_page_list (nr_scanned=1399 nr_reclaimed=205
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d90b98
with flags=100000000002004D
[ 70.205959] shrink_page_list (nr_scanned=41527 nr_reclaimed=2920
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000daa8d0
with flags=100000000002004D
[ 70.205962] shrink_page_list (nr_scanned=29077 nr_reclaimed=2460
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d90850
with flags=100000000002004D
[ 70.207962] shrink_page_list (nr_scanned=1399 nr_reclaimed=205
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d90bd0
with flags=100000000002004D
[ 70.207968] shrink_page_list (nr_scanned=29077 nr_reclaimed=2460
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d90888
with flags=100000000002004D
[ 70.208015] shrink_page_list (nr_scanned=41591 nr_reclaimed=2920
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d90f88
with flags=100000000002004D
[ 70.209950] shrink_page_list (nr_scanned=1399 nr_reclaimed=205
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d90d20
with flags=100000000002004D
[ 70.209954] shrink_page_list (nr_scanned=41591 nr_reclaimed=2920
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d917a0
with flags=100000000002004D
[ 70.210095] shrink_page_list (nr_scanned=29077 nr_reclaimed=2460
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d908f8
with flags=100000000002004D
[ 70.211948] shrink_page_list (nr_scanned=1399 nr_reclaimed=205
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d90d58
with flags=100000000002004D
[ 70.211952] shrink_page_list (nr_scanned=41591 nr_reclaimed=2920
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d91ab0
with flags=100000000002004D
[ 70.211955] shrink_page_list (nr_scanned=29077 nr_reclaimed=2460
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d90af0
with flags=100000000002004D
[ 70.213946] shrink_page_list (nr_scanned=1399 nr_reclaimed=205
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d90f18
with flags=100000000002004D
[ 70.213949] shrink_page_list (nr_scanned=41591 nr_reclaimed=2920
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d91c70
with flags=100000000002004D
[ 70.214034] shrink_page_list (nr_scanned=29165 nr_reclaimed=2460
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d92648
with flags=100000000002004D
[ 70.215944] shrink_page_list (nr_scanned=41591 nr_reclaimed=2920
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d91ca8
with flags=100000000002004D
[ 70.215948] shrink_page_list (nr_scanned=29165 nr_reclaimed=2460
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d92680
with flags=100000000002004D
[ 70.216002] shrink_page_list (nr_scanned=1462 nr_reclaimed=247
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d92728
with flags=100000000002004D
[ 70.217949] shrink_page_list (nr_scanned=1462 nr_reclaimed=247
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d92760
with flags=100000000002004D
[ 70.217952] shrink_page_list (nr_scanned=41591 nr_reclaimed=2920
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d925d8
with flags=100000000002004D
[ 70.218017] shrink_page_list (nr_scanned=29202 nr_reclaimed=2460
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d93bf0
with flags=100000000002004D
[ 70.219939] shrink_page_list (nr_scanned=41591 nr_reclaimed=2920
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d92610
with flags=100000000002004D
[ 70.220036] shrink_page_list (nr_scanned=29266 nr_reclaimed=2460
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d94018
with flags=100000000002004D
[ 70.220054] shrink_page_list (nr_scanned=1562 nr_reclaimed=290
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000dcdbe0
with flags=100000000002004D
[ 70.221934] shrink_page_list (nr_scanned=29266 nr_reclaimed=2460
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d940c0
with flags=100000000002004D
[ 70.221938] shrink_page_list (nr_scanned=1562 nr_reclaimed=290
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d95470
with flags=100000000002004D
[ 70.222585] shrink_page_list (nr_scanned=42665 nr_reclaimed=3127
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d8d7f8
with flags=100000000002004D
[ 70.223931] shrink_page_list (nr_scanned=29266 nr_reclaimed=2460
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d94130
with flags=100000000002004D
[ 70.223935] shrink_page_list (nr_scanned=42665 nr_reclaimed=3127
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d8d830
with flags=100000000002004D
[ 70.223976] shrink_page_list (nr_scanned=1612 nr_reclaimed=290
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d8f238
with flags=100000000002004D
[ 70.225929] shrink_page_list (nr_scanned=42665 nr_reclaimed=3127
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d8f468
with flags=100000000002004D
[ 70.225932] shrink_page_list (nr_scanned=1612 nr_reclaimed=290
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d8f158
with flags=100000000002004D
[ 70.225935] shrink_page_list (nr_scanned=29266 nr_reclaimed=2460
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d941a0
with flags=100000000002004D
[ 70.227934] shrink_page_list (nr_scanned=29266 nr_reclaimed=2460
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d944b0
with flags=100000000002004D
[ 70.228134] shrink_page_list (nr_scanned=42824 nr_reclaimed=3199
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d76cd8
with flags=100000000002004D
[ 70.228427] shrink_page_list (nr_scanned=2225 nr_reclaimed=409
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d7ad28
with flags=100000000002004D
[ 70.230232] shrink_page_list (nr_scanned=43013 nr_reclaimed=3247
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d695d0
with flags=100000000002004D
[ 70.230251] shrink_page_list (nr_scanned=2405 nr_reclaimed=458
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d69870
with flags=100000000002004D
[ 70.230446] shrink_page_list (nr_scanned=29609 nr_reclaimed=2544
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d6b978
with flags=100000000002004D
[ 70.231920] shrink_page_list (nr_scanned=29609 nr_reclaimed=2544
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d6b898
with flags=100000000002004D
[ 70.231924] shrink_page_list (nr_scanned=2405 nr_reclaimed=458
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d6a018
with flags=100000000002004D
[ 70.231927] shrink_page_list (nr_scanned=43013 nr_reclaimed=3247
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d69608
with flags=100000000002004D
[ 70.233918] shrink_page_list (nr_scanned=43013 nr_reclaimed=3247
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d69640
with flags=100000000002004D
[ 70.233921] shrink_page_list (nr_scanned=2405 nr_reclaimed=458
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d6a050
with flags=100000000002004D
[ 70.233925] shrink_page_list (nr_scanned=29609 nr_reclaimed=2544
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d6b6a0
with flags=100000000002004D
[ 70.235916] shrink_page_list (nr_scanned=43013 nr_reclaimed=3247
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d69720
with flags=100000000002004D
[ 70.235920] shrink_page_list (nr_scanned=2405 nr_reclaimed=458
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d6a088
with flags=100000000002004D
[ 70.236115] shrink_page_list (nr_scanned=29846 nr_reclaimed=2578
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d6cf58
with flags=100000000002004D
[ 70.237922] shrink_page_list (nr_scanned=29846 nr_reclaimed=2578
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d6cf90
with flags=100000000002004D
[ 70.237926] shrink_page_list (nr_scanned=43013 nr_reclaimed=3247
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d69758
with flags=100000000002004D
[ 70.237929] shrink_page_list (nr_scanned=2405 nr_reclaimed=458
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d6a130
with flags=100000000002004D
[ 70.239910] shrink_page_list (nr_scanned=29846 nr_reclaimed=2578
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d6cfc8
with flags=100000000002004D
[ 70.239914] shrink_page_list (nr_scanned=43013 nr_reclaimed=3247
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d697c8
with flags=100000000002004D
[ 70.239917] shrink_page_list (nr_scanned=2405 nr_reclaimed=458
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d6a168
with flags=100000000002004D
[ 70.241908] shrink_page_list (nr_scanned=43013 nr_reclaimed=3247
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d69800
with flags=100000000002004D
[ 70.241911] shrink_page_list (nr_scanned=2405 nr_reclaimed=458
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d6a1a0
with flags=100000000002004D
[ 70.241917] shrink_page_list (nr_scanned=29846 nr_reclaimed=2578
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d6d000
with flags=100000000002004D
[ 70.243906] shrink_page_list (nr_scanned=29846 nr_reclaimed=2578
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d6d038
with flags=100000000002004D
[ 70.243909] shrink_page_list (nr_scanned=43013 nr_reclaimed=3247
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d69838
with flags=100000000002004D
[ 70.243913] shrink_page_list (nr_scanned=2405 nr_reclaimed=458
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d6a408
with flags=100000000002004D
[ 70.245906] shrink_page_list (nr_scanned=29846 nr_reclaimed=2578
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d6d070
with flags=100000000002004D
[ 70.245977] shrink_page_list (nr_scanned=43067 nr_reclaimed=3282
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d6e1f0
with flags=100000000002004D
[ 70.245982] shrink_page_list (nr_scanned=2456 nr_reclaimed=502
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d6d428
with flags=100000000002004D
[ 70.247909] shrink_page_list (nr_scanned=43067 nr_reclaimed=3282
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d6e228
with flags=100000000002004D
[ 70.247912] shrink_page_list (nr_scanned=2456 nr_reclaimed=502
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d6d508
with flags=100000000002004D
[ 70.247915] shrink_page_list (nr_scanned=29846 nr_reclaimed=2578
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d6d0a8
with flags=100000000002004D
[ 70.249897] shrink_page_list (nr_scanned=29846 nr_reclaimed=2578
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d6d230
with flags=100000000002004D
[ 70.249901] shrink_page_list (nr_scanned=43067 nr_reclaimed=3282
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d6e260
with flags=100000000002004D
[ 70.249941] shrink_page_list (nr_scanned=2510 nr_reclaimed=502
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d70330
with flags=100000000002004D
[ 70.251895] shrink_page_list (nr_scanned=43067 nr_reclaimed=3282
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d6e298
with flags=100000000002004D
[ 70.251899] shrink_page_list (nr_scanned=2510 nr_reclaimed=502
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d702f8
with flags=100000000002004D
[ 70.251911] shrink_page_list (nr_scanned=29846 nr_reclaimed=2578
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d6d2a0
with flags=100000000002004D
[ 70.253891] shrink_page_list (nr_scanned=29846 nr_reclaimed=2578
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d6d2d8
with flags=100000000002004D
[ 70.253895] shrink_page_list (nr_scanned=2510 nr_reclaimed=502
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d70288
with flags=100000000002004D
[ 70.253898] shrink_page_list (nr_scanned=43067 nr_reclaimed=3282
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d6e2d0
with flags=100000000002004D
[ 70.255888] shrink_page_list (nr_scanned=29846 nr_reclaimed=2578
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d6d310
with flags=100000000002004D
[ 70.255893] shrink_page_list (nr_scanned=43067 nr_reclaimed=3282
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d6e308
with flags=100000000002004D
[ 70.255896] shrink_page_list (nr_scanned=2510 nr_reclaimed=502
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d70250
with flags=100000000002004D
[ 70.257896] shrink_page_list (nr_scanned=43067 nr_reclaimed=3282
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d6e420
with flags=100000000002004D
[ 70.257900] shrink_page_list (nr_scanned=2510 nr_reclaimed=502
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d70218
with flags=100000000002004D
[ 70.257903] shrink_page_list (nr_scanned=29846 nr_reclaimed=2578
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d6d348
with flags=100000000002004D
[ 70.259885] shrink_page_list (nr_scanned=43067 nr_reclaimed=3282
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d6e458
with flags=100000000002004D
[ 70.259889] shrink_page_list (nr_scanned=2510 nr_reclaimed=502
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d701a8
with flags=100000000002004D
[ 70.259892] shrink_page_list (nr_scanned=29846 nr_reclaimed=2578
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d6d380
with flags=100000000002004D
[ 70.261883] shrink_page_list (nr_scanned=43067 nr_reclaimed=3282
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d6e490
with flags=100000000002004D
[ 70.261886] shrink_page_list (nr_scanned=2510 nr_reclaimed=502
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d70138
with flags=100000000002004D
[ 70.261971] shrink_page_list (nr_scanned=29929 nr_reclaimed=2578
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d726a0
with flags=100000000002004D
[ 70.263882] shrink_page_list (nr_scanned=2510 nr_reclaimed=502
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d700c8
with flags=100000000002004D
[ 70.263976] shrink_page_list (nr_scanned=43067 nr_reclaimed=3282
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d6e650
with flags=100000000002004D
[ 70.264520] shrink_page_list (nr_scanned=30546 nr_reclaimed=2709
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d4dad8
with flags=100000000002004D
[ 70.266038] shrink_page_list (nr_scanned=30674 nr_reclaimed=2741
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d50bd8
with flags=100000000002004D
[ 70.266122] shrink_page_list (nr_scanned=43361 nr_reclaimed=3364
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d51818
with flags=100000000002004D
[ 70.266387] shrink_page_list (nr_scanned=2848 nr_reclaimed=627
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d57890
with flags=100000000002004D
[ 70.268009] shrink_page_list (nr_scanned=30754 nr_reclaimed=2741
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d57d28
with flags=100000000002004D
[ 70.268014] shrink_page_list (nr_scanned=2904 nr_reclaimed=627
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d42eb0
with flags=100000000002004D
[ 70.268070] shrink_page_list (nr_scanned=43559 nr_reclaimed=3419
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d433b8
with flags=100000000002004D
[ 70.269875] shrink_page_list (nr_scanned=2904 nr_reclaimed=627
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d42ee8
with flags=100000000002004D
[ 70.270288] shrink_page_list (nr_scanned=44119 nr_reclaimed=3492
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d1f350
with flags=100000000002004D
[ 70.270814] shrink_page_list (nr_scanned=31538 nr_reclaimed=2904
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d08bb0
with flags=100000000002004D
[ 70.271870] shrink_page_list (nr_scanned=44119 nr_reclaimed=3492
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d1f318
with flags=100000000002004D
[ 70.271874] shrink_page_list (nr_scanned=2904 nr_reclaimed=627
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d42f20
with flags=100000000002004D
[ 70.271963] shrink_page_list (nr_scanned=31617 nr_reclaimed=2904
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d08c58
with flags=100000000002004D
[ 70.273867] shrink_page_list (nr_scanned=44119 nr_reclaimed=3492
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d1f2e0
with flags=100000000002004D
[ 70.273870] shrink_page_list (nr_scanned=2904 nr_reclaimed=627
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d42fc8
with flags=100000000002004D
[ 70.273874] shrink_page_list (nr_scanned=31617 nr_reclaimed=2904
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d08d38
with flags=100000000002004D
[ 70.275864] shrink_page_list (nr_scanned=44119 nr_reclaimed=3492
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000d1f2a8
with flags=100000000002004D
[ 70.275867] shrink_page_list (nr_scanned=2904 nr_reclaimed=627
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d431c0
with flags=100000000002004D
[ 70.275870] shrink_page_list (nr_scanned=31617 nr_reclaimed=2904
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000d08ec0
with flags=100000000002004D
[ 70.277926] shrink_page_list (nr_scanned=2904 nr_reclaimed=627
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000d431f8
with flags=100000000002004D
[ 70.278125] shrink_page_list (nr_scanned=44344 nr_reclaimed=3492
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000cf79d0
with flags=100000000002004D
[ 70.278222] shrink_page_list (nr_scanned=31962 nr_reclaimed=2978
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000cf7e30
with flags=100000000002004D
[ 70.279858] shrink_page_list (nr_scanned=31962 nr_reclaimed=2978
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000cf7f80
with flags=100000000002004D
[ 70.279930] shrink_page_list (nr_scanned=2954 nr_reclaimed=664
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000cf8fb0
with flags=100000000002004D
[ 70.281855] shrink_page_list (nr_scanned=31962 nr_reclaimed=2978
nr_to_reclaim=32 gfp_mask=11212) found inactive page ffffea0000cf7fb8
with flags=100000000002004D
[ 70.286255] shrink_page_list (nr_scanned=6204 nr_reclaimed=1203
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000eca388
with flags=100000000002004D
[ 70.287863] shrink_page_list (nr_scanned=6204 nr_reclaimed=1203
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000eca350
with flags=100000000002004D
[ 70.289847] shrink_page_list (nr_scanned=6204 nr_reclaimed=1203
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000eca318
with flags=100000000002004D
[ 70.290123] shrink_page_list (nr_scanned=58419 nr_reclaimed=4751
nr_to_reclaim=32 gfp_mask=11210) found inactive page ffffea0000ed8200
with flags=1000000000000841
[ 70.291845] shrink_page_list (nr_scanned=6204 nr_reclaimed=1203
nr_to_reclaim=32 gfp_mask=200D2) found inactive page ffffea0000eca2e0
with flags=100000000002004D
[ 70.400259] shrink_page_list (nr_scanned=618 nr_reclaimed=117
nr_to_reclaim=32 gfp_mask=2005A) found inactive page ffffea0000de9eb8
with flags=100000000002004D
[ 70.403707] shrink_page_list (nr_scanned=618 nr_reclaimed=117
nr_to_reclaim=32 gfp_mask=2005A) found inactive page ffffea0000de9ef0
with flags=100000000002004D
[ 70.406705] shrink_page_list (nr_scanned=618 nr_reclaimed=117
nr_to_reclaim=32 gfp_mask=2005A) found inactive page ffffea0000de9f60
with flags=100000000002004D
[ 70.409706] shrink_page_list (nr_scanned=618 nr_reclaimed=117
nr_to_reclaim=32 gfp_mask=2005A) found inactive page ffffea0000de9f98
with flags=100000000002004D
[ 70.412711] shrink_page_list (nr_scanned=618 nr_reclaimed=117
nr_to_reclaim=32 gfp_mask=2005A) found inactive page ffffea0000de9fd0
with flags=100000000002004D
[ 70.415697] shrink_page_list (nr_scanned=618 nr_reclaimed=117
nr_to_reclaim=32 gfp_mask=2005A) found inactive page ffffea0000dea008
with flags=100000000002004D
[ 70.418828] shrink_page_list (nr_scanned=682 nr_reclaimed=117
nr_to_reclaim=32 gfp_mask=2005A) found inactive page ffffea0001a4f650
with flags=1000000000020849
[ 70.421696] shrink_page_list (nr_scanned=682 nr_reclaimed=117
nr_to_reclaim=32 gfp_mask=2005A) found inactive page ffffea00000824b0
with flags=1000000000020849
Right after that happened, I hit ctrl-c to kill test_mempressure.sh.
The system was OK until I typed sync, and then everything hung.

I'm really confused. shrink_inactive_list in
RECLAIM_MODE_LUMPYRECLAIM will call one of the isolate_pages functions
with ISOLATE_BOTH. The resulting list goes into shrink_page_list,
which does VM_BUG_ON(PageActive(page)).

How is that supposed to work?

--Andy
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