Hi I run dbench on btrfs, which is on file on xfs btrfs: disabling barriers on dev /dev/loop/0 ------------[ cut here ]------------ kernel BUG at mm/slub.c:1132! invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC last sysfs file: /sys/kernel/uevent_seqnum CPU 1 Modules linked in: Pid: 2078, comm: loop0 Not tainted 2.6.29-rc3-next-20090206 #1 RIP: 0010:[<ffffffff802c25ae>] [<ffffffff802c25ae>] __slab_alloc+0x41e/0x610 RSP: 0018:ffff88007b17d620 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 0000000000120012 RCX: 0000000000000010 RDX: 0000000000000000 RSI: ffffffff802c2301 RDI: ffffffff8026c12d RBP: ffff88007b17d670 R08: 0000000000000001 R09: 0000000000000000 R10: ffff88007dbbce40 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88007db82ed8 R14: ffff88007d2554a8 R15: ffff88007d255488 FS: 0000000000000000(0000) GS:ffff880004dd6000(0000) knlGS:0000000000000000 CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b CR2: 00007ff50c1bb000 CR3: 000000006c19d000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process loop0 (pid: 2078, threadinfo ffff88007b17c000, task ffff88007dbbce40) Stack: ffffffff802c27d9 ffffffff804379f7 ffffffff7d255488 0000001000120012 ffff88007b17d660 0000000000000000 0000000000000202 0000000000120012 ffff88007d255488 ffffffff804379f7 ffff88007b17d6b0 ffffffff802c2896 Call Trace: [<ffffffff802c27d9>] ? kmem_cache_alloc+0x39/0x100 [<ffffffff804379f7>] ? alloc_extent_state+0x17/0xa0 [<ffffffff804379f7>] ? alloc_extent_state+0x17/0xa0 [<ffffffff802c2896>] kmem_cache_alloc+0xf6/0x100 [<ffffffff804379f7>] alloc_extent_state+0x17/0xa0 [<ffffffff80439246>] clear_extent_bit+0x1a6/0x2e0 [<ffffffff80439cee>] try_release_extent_state+0x7e/0xa0 [<ffffffff80439e62>] try_release_extent_mapping+0x152/0x180 [<ffffffff802a0520>] ? __remove_mapping+0xd0/0x100 [<ffffffff804212f6>] __btrfs_releasepage+0x36/0x70 [<ffffffff80421355>] btrfs_releasepage+0x25/0x30 [<ffffffff8029391e>] try_to_release_page+0x2e/0x60 [<ffffffff802a1542>] shrink_page_list+0x572/0x860 [<ffffffff8062db3b>] ? _spin_unlock_irq+0x2b/0x60 [<ffffffff802a1ae1>] ? shrink_list+0x2b1/0x680 [<ffffffff802a1afd>] shrink_list+0x2cd/0x680 [<ffffffff802358a0>] ? sub_preempt_count+0xc0/0x130 [<ffffffff8062dbb2>] ? _spin_unlock_irqrestore+0x42/0x80 [<ffffffff80475890>] ? __up_write+0x70/0x120 [<ffffffff802a211b>] shrink_zone+0x26b/0x380 [<ffffffff802a2b35>] try_to_free_pages+0x255/0x3d0 [<ffffffff8029fc00>] ? isolate_pages_global+0x0/0x270 [<ffffffff8029a767>] __alloc_pages_internal+0x237/0x590 [<ffffffff80295545>] grab_cache_page_write_begin+0x85/0xd0 [<ffffffff8062b88c>] ? __mutex_lock_common+0x37c/0x4d0 [<ffffffff804fd7b3>] ? do_lo_send_aops+0x43/0x190 [<ffffffff802ee577>] block_write_begin+0x87/0xf0 [<ffffffff803eeee5>] xfs_vm_write_begin+0x25/0x30 [<ffffffff803ef270>] ? xfs_get_blocks+0x0/0x20 [<ffffffff802938eb>] pagecache_write_begin+0x1b/0x20 [<ffffffff804fd823>] do_lo_send_aops+0xb3/0x190 [<ffffffff8062db3b>] ? _spin_unlock_irq+0x2b/0x60 [<ffffffff802358a0>] ? sub_preempt_count+0xc0/0x130 [<ffffffff804fdd45>] loop_thread+0x445/0x4e0 [<ffffffff804fd770>] ? do_lo_send_aops+0x0/0x190 [<ffffffff80259420>] ? autoremove_wake_function+0x0/0x40 [<ffffffff804fd900>] ? loop_thread+0x0/0x4e0 [<ffffffff80258f76>] kthread+0x56/0x90 [<ffffffff8020ce5a>] child_rip+0xa/0x20 [<ffffffff80235759>] ? finish_task_switch+0x89/0x110 [<ffffffff8062db46>] ? _spin_unlock_irq+0x36/0x60 [<ffffffff8020c840>] ? restore_args+0x0/0x30 [<ffffffff80258f20>] ? kthread+0x0/0x90 [<ffffffff8020ce50>] ? child_rip+0x0/0x20 Code: e8 18 69 1b 00 e9 48 ff ff ff 31 c9 48 c7 c2 00 4f 81 80 89 c6 e8 93 7f fd ff 48 89 c3 48 85 c0 0f 85 73 fe ff ff e9 91 fd ff ff <0f> 0b eb fe 49 83 7f 60 00 90 0f 84 2d fd ff ff 4c 89 f7 e8 aa RIP [<ffffffff802c25ae>] __slab_alloc+0x41e/0x610 RSP <ffff88007b17d620>
On Fri, 2009-02-06 at 18:10 +0300, Alexander Beregalov wrote:> Hi > > I run dbench on btrfs, which is on file on xfs > > btrfs: disabling barriers on dev /dev/loop/0 > ------------[ cut here ]------------ > kernel BUG at mm/slub.c:1132! > invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC > last sysfs file: /sys/kernel/uevent_seqnumBtrfs hammers on slab caches quite a lot, can you reproduce this without loop or without btrfs? -chris -- To unsubscribe, send a message with ''unsubscribe linux-mm'' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don''t email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
2009/2/6 Alexander Beregalov <a.beregalov@gmail.com>:> Hi > > I run dbench on btrfs, which is on file on xfs > > btrfs: disabling barriers on dev /dev/loop/0 > ------------[ cut here ]------------ > kernel BUG at mm/slub.c:1132! > invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC > last sysfs file: /sys/kernel/uevent_seqnum > CPU 1 > Modules linked in: > Pid: 2078, comm: loop0 Not tainted 2.6.29-rc3-next-20090206 #1 > RIP: 0010:[<ffffffff802c25ae>] [<ffffffff802c25ae>] __slab_alloc+0x41e/0x610 > RSP: 0018:ffff88007b17d620 EFLAGS: 00010202 > RAX: 0000000000000000 RBX: 0000000000120012 RCX: 0000000000000010 > RDX: 0000000000000000 RSI: ffffffff802c2301 RDI: ffffffff8026c12d > RBP: ffff88007b17d670 R08: 0000000000000001 R09: 0000000000000000 > R10: ffff88007dbbce40 R11: 0000000000000000 R12: 0000000000000000 > R13: ffff88007db82ed8 R14: ffff88007d2554a8 R15: ffff88007d255488 > FS: 0000000000000000(0000) GS:ffff880004dd6000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b > CR2: 00007ff50c1bb000 CR3: 000000006c19d000 CR4: 00000000000006e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 > Process loop0 (pid: 2078, threadinfo ffff88007b17c000, task ffff88007dbbce40) > Stack: > ffffffff802c27d9 ffffffff804379f7 ffffffff7d255488 0000001000120012 > ffff88007b17d660 0000000000000000 0000000000000202 0000000000120012 > ffff88007d255488 ffffffff804379f7 ffff88007b17d6b0 ffffffff802c2896 > Call Trace: > [<ffffffff802c27d9>] ? kmem_cache_alloc+0x39/0x100 > [<ffffffff804379f7>] ? alloc_extent_state+0x17/0xa0 > [<ffffffff804379f7>] ? alloc_extent_state+0x17/0xa0 > [<ffffffff802c2896>] kmem_cache_alloc+0xf6/0x100 > [<ffffffff804379f7>] alloc_extent_state+0x17/0xa0 > [<ffffffff80439246>] clear_extent_bit+0x1a6/0x2e0 > [<ffffffff80439cee>] try_release_extent_state+0x7e/0xa0 > [<ffffffff80439e62>] try_release_extent_mapping+0x152/0x180 > [<ffffffff802a0520>] ? __remove_mapping+0xd0/0x100 > [<ffffffff804212f6>] __btrfs_releasepage+0x36/0x70 > [<ffffffff80421355>] btrfs_releasepage+0x25/0x30 > [<ffffffff8029391e>] try_to_release_page+0x2e/0x60 > [<ffffffff802a1542>] shrink_page_list+0x572/0x860 > [<ffffffff8062db3b>] ? _spin_unlock_irq+0x2b/0x60 > [<ffffffff802a1ae1>] ? shrink_list+0x2b1/0x680 > [<ffffffff802a1afd>] shrink_list+0x2cd/0x680 > [<ffffffff802358a0>] ? sub_preempt_count+0xc0/0x130 > [<ffffffff8062dbb2>] ? _spin_unlock_irqrestore+0x42/0x80 > [<ffffffff80475890>] ? __up_write+0x70/0x120 > [<ffffffff802a211b>] shrink_zone+0x26b/0x380 > [<ffffffff802a2b35>] try_to_free_pages+0x255/0x3d0 > [<ffffffff8029fc00>] ? isolate_pages_global+0x0/0x270 > [<ffffffff8029a767>] __alloc_pages_internal+0x237/0x590 > [<ffffffff80295545>] grab_cache_page_write_begin+0x85/0xd0 > [<ffffffff8062b88c>] ? __mutex_lock_common+0x37c/0x4d0 > [<ffffffff804fd7b3>] ? do_lo_send_aops+0x43/0x190 > [<ffffffff802ee577>] block_write_begin+0x87/0xf0 > [<ffffffff803eeee5>] xfs_vm_write_begin+0x25/0x30 > [<ffffffff803ef270>] ? xfs_get_blocks+0x0/0x20 > [<ffffffff802938eb>] pagecache_write_begin+0x1b/0x20 > [<ffffffff804fd823>] do_lo_send_aops+0xb3/0x190 > [<ffffffff8062db3b>] ? _spin_unlock_irq+0x2b/0x60 > [<ffffffff802358a0>] ? sub_preempt_count+0xc0/0x130 > [<ffffffff804fdd45>] loop_thread+0x445/0x4e0 > [<ffffffff804fd770>] ? do_lo_send_aops+0x0/0x190 > [<ffffffff80259420>] ? autoremove_wake_function+0x0/0x40 > [<ffffffff804fd900>] ? loop_thread+0x0/0x4e0 > [<ffffffff80258f76>] kthread+0x56/0x90 > [<ffffffff8020ce5a>] child_rip+0xa/0x20 > [<ffffffff80235759>] ? finish_task_switch+0x89/0x110 > [<ffffffff8062db46>] ? _spin_unlock_irq+0x36/0x60 > [<ffffffff8020c840>] ? restore_args+0x0/0x30 > [<ffffffff80258f20>] ? kthread+0x0/0x90 > [<ffffffff8020ce50>] ? child_rip+0x0/0x20 > > Code: e8 18 69 1b 00 e9 48 ff ff ff 31 c9 48 c7 c2 00 4f 81 80 89 c6 > e8 93 7f fd ff 48 89 c3 48 85 c0 0f 85 73 fe ff ff e9 91 fd ff ff <0f> > 0b eb fe 49 83 7f 60 00 90 0f 84 2d fd ff ff 4c 89 f7 e8 aa > RIP [<ffffffff802c25ae>] __slab_alloc+0x41e/0x610 > RSP <ffff88007b17d620> > --In the call stack, the flags parameter for kmem_cache_alloc is same as the gfp_flags parameter btrfs_releasepage gets. I guess the oops is due to __GFP_HIGHMEM is passed to kmem_cache_alloc. Regards Yan Zheng -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
2009/2/6 Chris Mason <chris.mason@oracle.com>:> On Fri, 2009-02-06 at 18:10 +0300, Alexander Beregalov wrote: >> Hi >> >> I run dbench on btrfs, which is on file on xfs >> >> btrfs: disabling barriers on dev /dev/loop/0 >> ------------[ cut here ]------------ >> kernel BUG at mm/slub.c:1132! >> invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC >> last sysfs file: /sys/kernel/uevent_seqnum > > Btrfs hammers on slab caches quite a lot, can you reproduce this without > loop or without btrfs?Hi Chris No, I can not reproduce it without loop. -- To unsubscribe, send a message with ''unsubscribe linux-mm'' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don''t email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>