Messages in this thread | | | From | Justin Piszcz <> | Date | Tue, 21 May 2019 05:01:06 -0400 | Subject | Re: 5.1 and 5.1.1: BUG: unable to handle kernel paging request at ffffea0002030000 |
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On Mon, May 20, 2019 at 7:56 AM Mel Gorman <mgorman@techsingularity.net> wrote: > > On Sun, May 12, 2019 at 04:27:45AM -0400, Justin Piszcz wrote: > > Hello, > > > > I've turned off zram/zswap and I am still seeing the following during > > periods of heavy I/O, I am returning to 5.0.xx in the meantime. > > > > Kernel: 5.1.1 > > Arch: x86_64 > > Dist: Debian x86_64 > > > > [29967.019411] BUG: unable to handle kernel paging request at ffffea0002030000 > > [29967.019414] #PF error: [normal kernel read fault] > > [29967.019415] PGD 103ffee067 P4D 103ffee067 PUD 103ffed067 PMD 0 > > [29967.019417] Oops: 0000 [#1] SMP PTI > > [29967.019419] CPU: 10 PID: 77 Comm: khugepaged Tainted: G > > T 5.1.1 #4 > > [29967.019420] Hardware name: Supermicro X9SRL-F/X9SRL-F, BIOS 3.2 01/16/2015 > > [29967.019424] RIP: 0010:isolate_freepages_block+0xb9/0x310 > > [29967.019425] Code: 24 28 48 c1 e0 06 40 f6 c5 1f 48 89 44 24 20 49 > > 8d 45 79 48 89 44 24 18 44 89 f0 4d 89 ee 45 89 fd 41 89 c7 0f 84 ef > > 00 00 00 <48> 8b 03 41 83 c4 01 a9 00 00 01 00 75 0c 48 8b 43 08 a8 01 > > 0f 84 > > If you have debugging symbols installed, can you translate the faulting > address with the following? > > ADDR=`nm /path/to/vmlinux-or-debuginfo-file | grep "t isolate_freepages_block\$" | awk '{print $1}'` > addr2line -i -e vmlinux `printf "0x%lX" $((0x$ADDR+0xb9))`
Another event this morning, this occurred when copying a single ~25GB backup file from one block device device (3ware HW RAID) to a SW RAID-1 (mdadm):
With this event, it was a fault and khugepaged is not stuck at 100% but this may be related as the stack trace is similar where compaction_alloc is utilizing most of the CPU: https://lkml.org/lkml/2019/5/9/225
# ADDR=`nm /usr/src/linux/vmlinux | grep "t isolate_freepages_block\$" | awk '{print $1}'` # echo $ADDR ffffffff812274f0 # addr2line -i -e /usr/src/linux/vmlinux `printf "0x%lX" $((0x$ADDR+0x83d))` compaction.c:? # addr2line -i -e /usr/src/linux/vmlinux `printf "0x%lX" $((0x$ADDR+0x8d0))` compaction.c:?
# grep DEBUG_INFO /usr/src/linux/.config-5.1.3-2 CONFIG_DEBUG_INFO=y
I can help test again in a 2-3 weeks if needed but for now I need to return back to disabling transparent huge pages.
[43775.068702] BUG: unable to handle kernel paging request at ffffea0002250000 [43775.068706] #PF error: [normal kernel read fault] [43775.068707] PGD 103ffee067 P4D 103ffee067 PUD 103ffed067 PMD 0 [43775.068709] Oops: 0000 [#1] SMP PTI [43775.068711] CPU: 1 PID: 77 Comm: khugepaged Tainted: G T 5.1.3 #2 [43775.068712] Hardware name: Supermicro X9SRL-F/X9SRL-F, BIOS 3.2 01/16/2015 [43775.068717] RIP: 0010:isolate_freepages_block+0xb9/0x310 [43775.068718] Code: 24 28 48 c1 e0 06 40 f6 c5 1f 48 89 44 24 20 49 8d 45 79 48 89 44 24 18 44 89 f0 4d 89 ee 45 89 fd 41 89 c7 0f 84 ef 00 00 00 <48> 8b 03 41 83 c4 01 a9 00 00 01 00 75 0c 48 8b 43 08 a8 01 0f 84 [43775.068719] RSP: 0018:ffffc900003a7860 EFLAGS: 00010246 [43775.068720] RAX: 0000000000000000 RBX: ffffea0002250000 RCX: ffffc900003a7b69 [43775.068721] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff828c4d90 [43775.068721] RBP: 0000000000089400 R08: 0000000000000001 R09: 0000000000000000 [43775.068722] R10: 0000000000000202 R11: ffffffff828c49d0 R12: 0000000000000000 [43775.068723] R13: 0000000000000000 R14: ffffc900003a7af0 R15: 0000000000000000 [43775.068724] FS: 0000000000000000(0000) GS:ffff88903f840000(0000) knlGS:0000000000000000 [43775.068725] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [43775.068725] CR2: ffffea0002250000 CR3: 000000000280e002 CR4: 00000000001606e0 [43775.068726] Call Trace: [43775.068730] compaction_alloc+0x83d/0x8d0 [43775.068732] migrate_pages+0x30d/0x750 [43775.068734] ? isolate_migratepages_block+0xa10/0xa10 [43775.068735] ? __reset_isolation_suitable+0x110/0x110 [43775.068736] compact_zone+0x684/0xa70 [43775.068738] compact_zone_order+0x109/0x150 [43775.068741] ? schedule_timeout+0x1ba/0x290 [43775.068743] ? record_times+0x13/0xa0 [43775.068744] try_to_compact_pages+0x10d/0x220 [43775.068747] __alloc_pages_direct_compact+0x93/0x180 [43775.068748] __alloc_pages_nodemask+0x6c7/0xe20 [43775.068751] ? __wake_up_common_lock+0xb0/0xb0 [43775.068752] khugepaged+0x31f/0x19c0 [43775.068754] ? __wake_up_common_lock+0xb0/0xb0 [43775.068755] ? __wake_up_common_lock+0xb0/0xb0 [43775.068756] ? collapse_shmem.isra.4+0xc20/0xc20 [43775.068759] kthread+0x10a/0x120 [43775.068761] ? __kthread_create_on_node+0x1b0/0x1b0 [43775.068762] ret_from_fork+0x35/0x40 [43775.068763] CR2: ffffea0002250000 [43775.068764] ---[ end trace 1f63fc0e799750fe ]--- [43775.068766] RIP: 0010:isolate_freepages_block+0xb9/0x310 [43775.068767] Code: 24 28 48 c1 e0 06 40 f6 c5 1f 48 89 44 24 20 49 8d 45 79 48 89 44 24 18 44 89 f0 4d 89 ee 45 89 fd 41 89 c7 0f 84 ef 00 00 00 <48> 8b 03 41 83 c4 01 a9 00 00 01 00 75 0c 48 8b 43 08 a8 01 0f 84 [43775.068767] RSP: 0018:ffffc900003a7860 EFLAGS: 00010246 [43775.068768] RAX: 0000000000000000 RBX: ffffea0002250000 RCX: ffffc900003a7b69 [43775.068769] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff828c4d90 [43775.068770] RBP: 0000000000089400 R08: 0000000000000001 R09: 0000000000000000 [43775.068770] R10: 0000000000000202 R11: ffffffff828c49d0 R12: 0000000000000000 [43775.068771] R13: 0000000000000000 R14: ffffc900003a7af0 R15: 0000000000000000 [43775.068772] FS: 0000000000000000(0000) GS:ffff88903f840000(0000) knlGS:0000000000000000 [43775.068773] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [43775.068773] CR2: ffffea0002250000 CR3: 000000000280e002 CR4: 00000000001606e0
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