Hi!
ceph is a very powerful thing.
it kills ext3:
[49531.320004] [<ffffffff811d3c4c>] ext3_new_blocks+0x40c/0x6b0
[49531.320004] [<ffffffff811d3f11>] ext3_new_block+0x21/0x30
[49531.320004] [<ffffffff811e798e>] ext3_xattr_block_set+0x2ae/0x790
[49531.320004] [<ffffffff811e86ba>] ext3_xattr_set_handle+0x30a/0x4c0
[49531.320004] [<ffffffff811e88f5>] ext3_xattr_set+0x85/0xe0
[49531.320004] [<ffffffff81277053>] ?
security_inode_exec_permission+0x23/0x30
[49531.320004] [<ffffffff811e8ae9>] ext3_xattr_user_set+0x49/0x50
[49531.320004] [<ffffffff811818e4>] generic_setxattr+0x74/0x90
[49531.320004] [<ffffffff811820c0>] __vfs_setxattr_noperm+0x50/0x1a0
[49531.320004] [<ffffffff8116adb8>] ? inode_permission+0xa8/0xd0
[49531.320004] [<ffffffff811822cc>] vfs_setxattr+0xbc/0xc0
[49531.320004] [<ffffffff81182392>] setxattr+0xc2/0x150
[49531.320004] [<ffffffff8114fec0>] ? kmem_cache_free+0x20/0x110
[49531.320004] [<ffffffff8116ae33>] ? putname+0x33/0x50
[49531.320004] [<ffffffff8116ef84>] ? user_path_at+0x64/0xa0
[49531.320004] [<ffffffff815d3493>] ? schedule+0x3d3/0xa00
[49531.320004] [<ffffffff81099c7b>] ? sys_futex+0x7b/0x180
[49531.320004] [<ffffffff811824b5>] sys_setxattr+0x95/0xb0
[49531.320004] [<ffffffff815ddec2>] system_call_fastpath+0x16/0x1b
it kills btrfs:
[91970.322381] [<ffffffff81062bbf>] warn_slowpath_common+0x7f/0xc0
[91970.322385] [<ffffffff81062c1a>] warn_slowpath_null+0x1a/0x20
[91970.322394] [<ffffffffa01a1b58>] btrfs_alloc_free_block+0x1f8/0x330
[btrfs]
[91970.322403] [<ffffffffa018f6cf>] __btrfs_cow_block+0x14f/0x600 [btrfs]
[91970.322414] [<ffffffffa01ab5c0>] ? btrfs_buffer_uptodate+0x50/0x70
[btrfs]
[91970.322422] [<ffffffffa018fc93>] btrfs_cow_block+0x113/0x240 [btrfs]
[91970.322431] [<ffffffffa0194c15>] btrfs_search_slot+0x555/0x850 [btrfs]
[91970.322441] [<ffffffffa01a82af>] btrfs_lookup_inode+0x2f/0xa0 [btrfs]
[91970.322453] [<ffffffffa01b597e>] btrfs_update_inode+0x5e/0x100 [btrfs]
[91970.322464] [<ffffffffa01b9957>] btrfs_truncate+0x587/0x600 [btrfs]
[91970.322476] [<ffffffffa01b9cef>] btrfs_setsize+0x4f/0xd0 [btrfs]
[91970.322488] [<ffffffffa01b9e2c>] btrfs_setattr+0xbc/0xd0 [btrfs]
[91970.322492] [<ffffffff8117aa89>] notify_change+0x189/0x370
[91970.322496] [<ffffffff8115eb11>] do_truncate+0x61/0x90
[91970.322500] [<ffffffff8116a323>] ? generic_permission+0x23/0xd0
[91970.322504] [<ffffffff8116bec2>] ? get_write_access+0x42/0x70
[91970.322507] [<ffffffff8115ecca>] sys_truncate+0x18a/0x1a0
[91970.322512] [<ffffffff815ddec2>] system_call_fastpath+0x16/0x1b
[91973.333974] [<ffffffff81062bbf>] warn_slowpath_common+0x7f/0xc0
[91973.333978] [<ffffffff81062c1a>] warn_slowpath_null+0x1a/0x20
[91973.333990] [<ffffffffa01b568b>] btrfs_orphan_commit_root+0xbb/0xd0
[btrfs]
[91973.334001] [<ffffffffa01aee84>] commit_fs_roots.clone.20+0x94/0x120
[btrfs]
[91973.334013] [<ffffffffa01afc62>]
btrfs_commit_transaction+0x342/0x7c0 [btrfs]
[91973.334017] [<ffffffff810846d0>] ? wake_up_bit+0x40/0x40
[91973.334021] [<ffffffff81051dd1>] ? finish_task_switch+0x41/0xe0
[91973.334033] [<ffffffffa01b00e0>] ?
btrfs_commit_transaction+0x7c0/0x7c0 [btrfs]
[91973.334044] [<ffffffffa01b00ff>] do_async_commit+0x1f/0x30 [btrfs]
[91973.334048] [<ffffffff8107ecdd>] process_one_work+0x11d/0x420
[91973.334052] [<ffffffff8107f799>] worker_thread+0x169/0x360
[91973.334055] [<ffffffff8107f630>] ? manage_workers.clone.21+0x240/0x240
[91973.334059] [<ffffffff81083f36>] kthread+0x96/0xa0
[91973.334063] [<ffffffff815defe4>] kernel_thread_helper+0x4/0x10
[91973.334067] [<ffffffff81083ea0>] ? flush_kthread_worker+0xb0/0xb0
[91973.334070] [<ffffffff815defe0>] ? gs_change+0x13/0x13
I choose what to kill next? XFS may be? (bloodthirsty grins).
WBR,
Fyodor.
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