On 03/31/2015 06:54 PM, Andrew Morton wrote: >> [ 2896.340953] trinity-c6 R running task 27040 6561 9144 0x10000006 >> > [ 2896.342673] ffff8802e72576a8 ffff8802e7257758 ffffffffabfdd628 003c5e36ef1674fa >> > [ 2896.344267] ffff8801533e1588 ffff8801533e1560 ffff8802d3963778 ffff8802ad220000 >> > [ 2896.345824] ffff8802d3963000 0000000000000000 ffff8802e7250000 ffffed005ce4a002 >> > [ 2896.347286] Call Trace: >> > [ 2896.347784] ? trace_hardirqs_on_thunk (arch/x86/lib/thunk_64.S:42) >> > [ 2896.348977] preempt_schedule_common (./arch/x86/include/asm/preempt.h:77 (discriminator 1) kernel/sched/core.c:2867 (discriminator 1)) >> > [ 2896.350279] preempt_schedule (kernel/sched/core.c:2893) >> > [ 2896.351349] ___preempt_schedule (arch/x86/lib/thunk_64.S:51) >> > [ 2896.353782] __debug_check_no_obj_freed (lib/debugobjects.c:713) >> > [ 2896.360001] debug_check_no_obj_freed (lib/debugobjects.c:727) >> > [ 2896.361574] free_pages_prepare (mm/page_alloc.c:823) >> > [ 2896.362657] free_hot_cold_page (mm/page_alloc.c:1550) >> > [ 2896.363735] free_hot_cold_page_list (mm/page_alloc.c:1596 (discriminator 3)) >> > [ 2896.364846] release_pages (mm/swap.c:935) >> > [ 2896.367979] __pagevec_release (include/linux/pagevec.h:44 mm/swap.c:1013) >> > [ 2896.369149] shmem_undo_range (include/linux/pagevec.h:69 mm/shmem.c:446) >> > [ 2896.377070] shmem_truncate_range (mm/shmem.c:541) >> > [ 2896.378450] shmem_setattr (mm/shmem.c:577) >> > [ 2896.379556] notify_change (fs/attr.c:270) >> > [ 2896.382804] do_truncate (fs/open.c:62) >> > [ 2896.387739] do_sys_ftruncate.constprop.4 (fs/open.c:191) >> > [ 2896.389450] SyS_ftruncate (fs/open.c:199) >> > [ 2896.390879] tracesys_phase2 (arch/x86/kernel/entry_64.S:340) > OK, so shmem_undo_range() is full of cond_resched()s but it's holding > i_mutex for too long. Hugh, fix your junk! Ping on this one? It's causing lockups on all kernels... Thanks, Sasha -- 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>