Comment # 1 on bug 1186726 from 
~2 weeks after the first incident, on April 13, I saw this (related or not?)

> [49717.950150] artemis.mittagstun.de kernel: XFS (dm-0): Internal error XFS_WANT_CORRUPTED_RETURN at line 442 of file ../fs/xfs/libxfs/xfs_alloc.c.  Caller xfs_alloc_ag>
> [49717.950154] artemis.mittagstun.de kernel: CPU: 3 PID: 9934 Comm: vi Not tainted 5.3.18-lp152.69-default #1 openSUSE Leap 15.2
> [49717.950155] artemis.mittagstun.de kernel: Hardware name: FUJITSU LIFEBOOK S904/FJNB272, BIOS Version 1.20 07/25/2014
> [49717.950156] artemis.mittagstun.de kernel: Call Trace:
> [49717.950165] artemis.mittagstun.de kernel:  dump_stack+0x66/0x8b
> [49717.950195] artemis.mittagstun.de kernel:  xfs_alloc_fixup_trees+0x263/0x390 [xfs]
> [49717.950225] artemis.mittagstun.de kernel:  xfs_alloc_ag_vextent_near+0x8b7/0xb20 [xfs]
> [49717.950255] artemis.mittagstun.de kernel:  xfs_alloc_ag_vextent+0x140/0x150 [xfs]
> [49717.950284] artemis.mittagstun.de kernel:  xfs_alloc_vextent+0x3f3/0x560 [xfs]
> [49717.950315] artemis.mittagstun.de kernel:  xfs_bmap_btalloc+0x2f1/0x8d0 [xfs]
> [49717.950348] artemis.mittagstun.de kernel:  xfs_bmapi_allocate+0x106/0x2c0 [xfs]
> [49717.950386] artemis.mittagstun.de kernel:  xfs_bmapi_convert_delalloc+0x289/0x4b0 [xfs]
> [49717.950428] artemis.mittagstun.de kernel:  xfs_map_blocks+0x15d/0x3f0 [xfs]
> [49717.950479] artemis.mittagstun.de kernel:  xfs_do_writepage+0x10c/0x400 [xfs]
> [49717.950483] artemis.mittagstun.de kernel:  write_cache_pages+0x16b/0x400
> [49717.950515] artemis.mittagstun.de kernel:  ? xfs_vm_writepages+0xa0/0xa0 [xfs]
> [49717.950521] artemis.mittagstun.de kernel:  ? ecryptfs_write_inode_size_to_metadata+0x6b/0x190 [ecryptfs]
> [49717.950558] artemis.mittagstun.de kernel:  xfs_vm_writepages+0x64/0xa0 [xfs]
> [49717.950561] artemis.mittagstun.de kernel:  do_writepages+0x4b/0xe0
> [49717.950564] artemis.mittagstun.de kernel:  ? __filemap_fdatawrite_range+0xcb/0x100
> [49717.950566] artemis.mittagstun.de kernel:  __filemap_fdatawrite_range+0xcb/0x100
> [49717.950568] artemis.mittagstun.de kernel:  file_write_and_wait_range+0x5e/0xb0
> [49717.950609] artemis.mittagstun.de kernel:  xfs_file_fsync+0x5d/0x1d0 [xfs]
> [49717.950616] artemis.mittagstun.de kernel:  do_fsync+0x38/0x60
> [49717.950619] artemis.mittagstun.de kernel:  __x64_sys_fsync+0x10/0x20
> [49717.950623] artemis.mittagstun.de kernel:  do_syscall_64+0x65/0x1f0
> [49717.950627] artemis.mittagstun.de kernel:  entry_SYSCALL_64_after_hwframe+0x44/0xa9
> [49717.950630] artemis.mittagstun.de kernel: RIP: 0033:0x7f375b8095c4
> [49717.950632] artemis.mittagstun.de kernel: Code: c0 ff ff ff ff eb b7 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 8b 05 aa bb 20 00 48 63 ff 85 c0 75 13 b8 4a 00 00 >
> [49717.950633] artemis.mittagstun.de kernel: RSP: 002b:00007ffe187334e8 EFLAGS: 00000246 ORIG_RAX: 000000000000004a
> [49717.950635] artemis.mittagstun.de kernel: RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f375b8095c4
> [49717.950636] artemis.mittagstun.de kernel: RDX: 00007ffe18733390 RSI: 0000557116945a30 RDI: 0000000000000004
> [49717.950636] artemis.mittagstun.de kernel: RBP: 0000000000000001 R08: 00007ffe18733300 R09: 0000000000000001
> [49717.950637] artemis.mittagstun.de kernel: R10: 000000000000009d R11: 0000000000000246 R12: 0000557116fa0f70
> [49717.950638] artemis.mittagstun.de kernel: R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000000
> [49717.950648] artemis.mittagstun.de kernel: XFS (dm-0): page discard on page 00000000eedbe0be, inode 0x400da67, offset 24576.
> [49717.950658] artemis.mittagstun.de kernel: XFS (dm-0): writeback error on sector 26277768
> [49729.665621] artemis.mittagstun.de kernel: XFS (dm-0): Internal error XFS_WANT_CORRUPTED_RETURN at line 442 of file ../fs/xfs/libxfs/xfs_alloc.c.  Caller xfs_alloc_ag>
> [49729.665625] artemis.mittagstun.de kernel: CPU: 3 PID: 9934 Comm: vi Not tainted 5.3.18-lp152.69-default #1 openSUSE Leap 15.2
> [49729.665626] artemis.mittagstun.de kernel: Hardware name: FUJITSU LIFEBOOK S904/FJNB272, BIOS Version 1.20 07/25/2014
> [49729.665627] artemis.mittagstun.de kernel: Call Trace:
> [49729.665636] artemis.mittagstun.de kernel:  dump_stack+0x66/0x8b
> [49729.665667] artemis.mittagstun.de kernel:  xfs_alloc_fixup_trees+0x263/0x390 [xfs]
> [49729.665697] artemis.mittagstun.de kernel:  xfs_alloc_ag_vextent_near+0x8b7/0xb20 [xfs]
> [49729.665728] artemis.mittagstun.de kernel:  xfs_alloc_ag_vextent+0x140/0x150 [xfs]
> [49729.665757] artemis.mittagstun.de kernel:  xfs_alloc_vextent+0x3f3/0x560 [xfs]
> [49729.665789] artemis.mittagstun.de kernel:  xfs_bmap_btalloc+0x2f1/0x8d0 [xfs]
> [49729.665821] artemis.mittagstun.de kernel:  xfs_bmapi_allocate+0x106/0x2c0 [xfs]
> [49729.665853] artemis.mittagstun.de kernel:  xfs_bmapi_convert_delalloc+0x289/0x4b0 [xfs]
> [49729.665896] artemis.mittagstun.de kernel:  xfs_map_blocks+0x15d/0x3f0 [xfs]
> [49729.665936] artemis.mittagstun.de kernel:  xfs_do_writepage+0x10c/0x400 [xfs]
> [49729.665941] artemis.mittagstun.de kernel:  write_cache_pages+0x16b/0x400
> [49729.665977] artemis.mittagstun.de kernel:  ? xfs_vm_writepages+0xa0/0xa0 [xfs]
> [49729.665984] artemis.mittagstun.de kernel:  ? ecryptfs_write_inode_size_to_metadata+0x6b/0x190 [ecryptfs]
> [49729.666019] artemis.mittagstun.de kernel:  xfs_vm_writepages+0x64/0xa0 [xfs]
> [49729.666023] artemis.mittagstun.de kernel:  do_writepages+0x4b/0xe0
> [49729.666026] artemis.mittagstun.de kernel:  ? __filemap_fdatawrite_range+0xcb/0x100
> [49729.666028] artemis.mittagstun.de kernel:  __filemap_fdatawrite_range+0xcb/0x100
> [49729.666030] artemis.mittagstun.de kernel:  file_write_and_wait_range+0x5e/0xb0
> [49729.666083] artemis.mittagstun.de kernel:  xfs_file_fsync+0x5d/0x1d0 [xfs]
> [49729.666088] artemis.mittagstun.de kernel:  do_fsync+0x38/0x60
> [49729.666091] artemis.mittagstun.de kernel:  __x64_sys_fsync+0x10/0x20
> [49729.666094] artemis.mittagstun.de kernel:  do_syscall_64+0x65/0x1f0
> [49729.666098] artemis.mittagstun.de kernel:  entry_SYSCALL_64_after_hwframe+0x44/0xa9
> [49729.666100] artemis.mittagstun.de kernel: RIP: 0033:0x7f375b8095c4
> [49729.666102] artemis.mittagstun.de kernel: Code: c0 ff ff ff ff eb b7 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 8b 05 aa bb 20 00 48 63 ff 85 c0 75 13 b8 4a 00 00 >
> [49729.666103] artemis.mittagstun.de kernel: RSP: 002b:00007ffe187334e8 EFLAGS: 00000246 ORIG_RAX: 000000000000004a
> [49729.666105] artemis.mittagstun.de kernel: RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f375b8095c4
> [49729.666106] artemis.mittagstun.de kernel: RDX: 00007ffe18733390 RSI: 0000557116945a30 RDI: 0000000000000004
> [49729.666106] artemis.mittagstun.de kernel: RBP: 0000000000000001 R08: 00007ffe18733300 R09: 0000000000000001
> [49729.666107] artemis.mittagstun.de kernel: R10: 00007ffe18733410 R11: 0000000000000246 R12: 0000557116fa0f70
> [49729.666108] artemis.mittagstun.de kernel: R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000000
> [49729.666116] artemis.mittagstun.de kernel: XFS (dm-0): page discard on page 00000000eedbe0be, inode 0x400da67, offset 24576.
> [49729.666129] artemis.mittagstun.de kernel: XFS (dm-0): writeback error on sector 26277744
> [49754.062137] artemis.mittagstun.de kernel: XFS (dm-0): Internal error XFS_WANT_CORRUPTED_RETURN at line 442 of file ../fs/xfs/libxfs/xfs_alloc.c.  Caller xfs_alloc_ag>
> [49754.062141] artemis.mittagstun.de kernel: CPU: 1 PID: 9934 Comm: vi Not tainted 5.3.18-lp152.69-default #1 openSUSE Leap 15.2
> [49754.062142] artemis.mittagstun.de kernel: Hardware name: FUJITSU LIFEBOOK S904/FJNB272, BIOS Version 1.20 07/25/2014
> [49754.062143] artemis.mittagstun.de kernel: Call Trace:
> [49754.062154] artemis.mittagstun.de kernel:  dump_stack+0x66/0x8b
> [49754.062184] artemis.mittagstun.de kernel:  xfs_alloc_fixup_trees+0x263/0x390 [xfs]
> [49754.062216] artemis.mittagstun.de kernel:  xfs_alloc_ag_vextent_near+0x8b7/0xb20 [xfs]
> [49754.062245] artemis.mittagstun.de kernel:  xfs_alloc_ag_vextent+0x140/0x150 [xfs]
> [49754.062274] artemis.mittagstun.de kernel:  xfs_alloc_vextent+0x3f3/0x560 [xfs]
> [49754.062305] artemis.mittagstun.de kernel:  xfs_bmap_btalloc+0x2f1/0x8d0 [xfs]
> [49754.062338] artemis.mittagstun.de kernel:  xfs_bmapi_allocate+0x106/0x2c0 [xfs]
> [49754.062369] artemis.mittagstun.de kernel:  xfs_bmapi_convert_delalloc+0x289/0x4b0 [xfs]
> [49754.062413] artemis.mittagstun.de kernel:  xfs_map_blocks+0x15d/0x3f0 [xfs]
> [49754.062453] artemis.mittagstun.de kernel:  xfs_do_writepage+0x10c/0x400 [xfs]
> [49754.062458] artemis.mittagstun.de kernel:  write_cache_pages+0x16b/0x400
> [49754.062495] artemis.mittagstun.de kernel:  ? xfs_vm_writepages+0xa0/0xa0 [xfs]
> [49754.062501] artemis.mittagstun.de kernel:  ? ecryptfs_write_inode_size_to_metadata+0x6b/0x190 [ecryptfs]
> [49754.062536] artemis.mittagstun.de kernel:  xfs_vm_writepages+0x64/0xa0 [xfs]
> [49754.062540] artemis.mittagstun.de kernel:  do_writepages+0x4b/0xe0
> [49754.062543] artemis.mittagstun.de kernel:  ? __filemap_fdatawrite_range+0xcb/0x100
> [49754.062545] artemis.mittagstun.de kernel:  __filemap_fdatawrite_range+0xcb/0x100
> [49754.062547] artemis.mittagstun.de kernel:  file_write_and_wait_range+0x5e/0xb0
> [49754.062589] artemis.mittagstun.de kernel:  xfs_file_fsync+0x5d/0x1d0 [xfs]
> [49754.062595] artemis.mittagstun.de kernel:  do_fsync+0x38/0x60
> [49754.062599] artemis.mittagstun.de kernel:  __x64_sys_fsync+0x10/0x20
> [49754.062602] artemis.mittagstun.de kernel:  do_syscall_64+0x65/0x1f0
> [49754.062606] artemis.mittagstun.de kernel:  entry_SYSCALL_64_after_hwframe+0x44/0xa9
> [49754.062608] artemis.mittagstun.de kernel: RIP: 0033:0x7f375b8095c4
> [49754.062611] artemis.mittagstun.de kernel: Code: c0 ff ff ff ff eb b7 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 8b 05 aa bb 20 00 48 63 ff 85 c0 75 13 b8 4a 00 00 >
> [49754.062612] artemis.mittagstun.de kernel: RSP: 002b:00007ffe187334e8 EFLAGS: 00000246 ORIG_RAX: 000000000000004a
> [49754.062614] artemis.mittagstun.de kernel: RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f375b8095c4
> [49754.062615] artemis.mittagstun.de kernel: RDX: 00007ffe18733390 RSI: 0000557116945a30 RDI: 0000000000000004
> [49754.062616] artemis.mittagstun.de kernel: RBP: 0000000000000001 R08: 00007ffe18733300 R09: 0000000000000001
> [49754.062617] artemis.mittagstun.de kernel: R10: 00007ffe18733410 R11: 0000000000000246 R12: 0000557116fa0f70
> [49754.062618] artemis.mittagstun.de kernel: R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000000
> [49754.062627] artemis.mittagstun.de kernel: XFS (dm-0): page discard on page 00000000eedbe0be, inode 0x400da67, offset 24576.
> [49754.062636] artemis.mittagstun.de kernel: XFS (dm-0): writeback error on sector 26277784

This was seen once more on Apr 25, but not any more after that.

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