(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). On Wed, 19 Jun 2013 08:03:23 +0000 (UTC) bugzilla-daemon@xxxxxxxxxxxxxxxxxxx wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=59901 > > Summary: OOM deadlock > Product: Memory Management > Version: 2.5 > Kernel Version: v3.10-rc6 > Platform: All > OS/Version: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: Other > AssignedTo: akpm@xxxxxxxxxxxxxxxxxxxx > ReportedBy: bvanassche@xxxxxxx > Regression: No > > > Apparently with kernel v3.10-rc6 when triggering an OOM enough times the mm > subsystem locks up (haven't tried any other kernel versions yet). Leaving the > following script running for a few minutes is sufficient to trigger the lockup: > > #!/bin/bash > swapoff -a > while true; do > free="$(free | sed -n > 's|.*buffers/cache:[[:blank:]]*[^[:blank:]]*[[:blank:]]*||p')" > for ((i=free-15000;i<free;i+=1000)); do > echo "size $i KB ..." > dd if=/dev/zero of=/dev/null bs=${i}K count=1 > done > done > > When the lockup occurs sometimes the following kernel messages are generated: > > [ 840.360097] INFO: task rtkit-daemon:1538 blocked for more than 120 seconds. > [ 840.360117] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this > [ 840.360122] rtkit-daemon D ffffffffffffffff 0 1538 1 0x00000000 > [ 840.360129] ffff880029d19dc0 0000000000000046 ffff880029d10000 > ffff880029d19 > [ 840.360136] ffff880029d19fd8 ffff880029d19fd8 ffff880036dc0000 > ffff880029d10 > [ 840.360142] ffff880029d10000 ffff88003bc347f0 ffff88003bc347f8 > ffff88003bc34 > [ 840.360149] Call Trace: > [ 840.360158] [<ffffffff8152b9e9>] schedule+0x29/0x70 > [ 840.360162] [<ffffffff8152c415>] rwsem_down_write_failed+0xe5/0x190 > [ 840.360167] [<ffffffff8108046d>] ? sched_clock_local+0x1d/0x90 > [ 840.360173] [<ffffffff81245d23>] call_rwsem_down_write_failed+0x13/0x20 > [ 840.360177] [<ffffffff8152a1aa>] ? down_write+0x9a/0xc0 > [ 840.360182] [<ffffffff811330e4>] ? vm_mmap_pgoff+0x54/0xb0 > [ 840.360186] [<ffffffff811330e4>] vm_mmap_pgoff+0x54/0xb0 > [ 840.360190] [<ffffffff8114561b>] SyS_mmap_pgoff+0x5b/0x280 > [ 840.360194] [<ffffffff81245dbe>] ? trace_hardirqs_on_thunk+0x3a/0x3f > [ 840.360198] [<ffffffff81006882>] SyS_mmap+0x22/0x30 > [ 840.360208] [<ffffffff815367d9>] system_call_fastpath+0x16/0x1b > [ 840.360211] 1 lock held by rtkit-daemon/1538: > [ 840.360213] #0: (&mm->mmap_sem){++++++}, at: [<ffffffff811330e4>] > vm_mmap_p > > -- > Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email > ------- You are receiving this mail because: ------- > You are the assignee for the bug. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>