On 15/08/2012 19:28, Olivier Bonvalet wrote:
> Hi,
>
> I have a strange problem with a btrfs partition : after an error, btrfs was
> forced readonly.
>
> So I try to umount it, to launch btrfsck, but it doesn't work :
>
I forgot, it was set readonly after that error :
Aug 15 09:44:33 sofia kernel: [29840.510826] ------------[ cut here
]------------
Aug 15 09:44:33 sofia kernel: [29840.510850] WARNING: at fs/btrfs/super.c:219
__btrfs_abort_transaction+0x3a/0x95 [btrfs]()
Aug 15 09:44:33 sofia kernel: [29840.510858] btrfs: Transaction aborted
Aug 15 09:44:33 sofia kernel: [29840.510860] Modules linked in: ipv6 btrfs
zram(C) nf_conntrack
Aug 15 09:44:33 sofia kernel: [29840.510872] Pid: 26524, comm: btrfs Tainted: G
C 2.6.44.7-dae-xen #2
Aug 15 09:44:33 sofia kernel: [29840.510879] Call Trace:
Aug 15 09:44:33 sofia kernel: [29840.510893] [<ffffffff8103c7cf>] ?
warn_slowpath_common+0x76/0x8a
Aug 15 09:44:33 sofia kernel: [29840.510901] [<ffffffff8103c87b>] ?
warn_slowpath_fmt+0x45/0x4a
Aug 15 09:44:33 sofia kernel: [29840.510924] [<ffffffffa0077346>] ?
btrfs_alloc_delayed_item+0x13/0x3b [btrfs]
Aug 15 09:44:33 sofia kernel: [29840.510941] [<ffffffffa00203d2>] ?
__btrfs_abort_transaction+0x3a/0x95 [btrfs]
Aug 15 09:44:33 sofia kernel: [29840.510964] [<ffffffffa0042c80>] ?
btrfs_unlink_subvol+0x1cf/0x255 [btrfs]
Aug 15 09:44:33 sofia kernel: [29840.510987] [<ffffffffa0062178>] ?
btrfs_ioctl_snap_destroy+0x2e0/0x42c [btrfs]
Aug 15 09:44:33 sofia kernel: [29840.511010] [<ffffffffa0064f8c>] ?
btrfs_ioctl+0x4f6/0xfce [btrfs]
Aug 15 09:44:33 sofia kernel: [29840.511022] [<ffffffff81021ffa>] ?
do_page_fault+0x274/0x2f2
Aug 15 09:44:33 sofia kernel: [29840.511031] [<ffffffff810d39ca>] ?
vfs_ioctl+0x1e/0x31
Aug 15 09:44:33 sofia kernel: [29840.511039] [<ffffffff810d41ba>] ?
do_vfs_ioctl+0x3bd/0x3ff
Aug 15 09:44:33 sofia kernel: [29840.511046] [<ffffffff810d4238>] ?
sys_ioctl+0x3c/0x60
Aug 15 09:44:33 sofia kernel: [29840.511055] [<ffffffff81304979>] ?
system_call_fastpath+0x16/0x1b
Aug 15 09:44:33 sofia kernel: [29840.511062] ---[ end trace 17eb064ed1556a08
]---
Aug 15 09:44:33 sofia kernel: [29840.511071] BTRFS error (device dm-1) in
btrfs_unlink_subvol:3098: error 28
Aug 15 09:44:33 sofia kernel: [29840.511077] btrfs is forced readonly
Aug 15 09:44:33 sofia kernel: [29840.511083] BTRFS error (device dm-1) in
btrfs_ioctl_snap_destroy:2026: error 28
then in logs I have this warnings :
Aug 15 09:51:42 sofia kernel: [30269.723855] ------------[ cut here
]------------
Aug 15 09:51:42 sofia kernel: [30269.723893] WARNING: at fs/btrfs/inode.c:6954
btrfs_destroy_inode+0x64/0x26c [btrfs]()
Aug 15 09:51:42 sofia kernel: [30269.723905] Modules linked in: ipv6 btrfs
zram(C) nf_conntrack
Aug 15 09:51:42 sofia kernel: [30269.723920] Pid: 27751, comm: ssh Tainted: G
WC 2.6.44.7-dae-xen #2
Aug 15 09:51:42 sofia kernel: [30269.723928] Call Trace:
Aug 15 09:51:42 sofia kernel: [30269.723939] [<ffffffff8103c7cf>] ?
warn_slowpath_common+0x76/0x8a
Aug 15 09:51:42 sofia kernel: [30269.723975] [<ffffffffa004678f>] ?
btrfs_destroy_inode+0x64/0x26c [btrfs]
Aug 15 09:51:42 sofia kernel: [30269.724010] [<ffffffffa004672b>] ?
btrfs_alloc_inode+0x1d9/0x1d9 [btrfs]
Aug 15 09:51:42 sofia kernel: [30269.724052] [<ffffffff810d9943>] ?
dispose_list+0x27/0x31
Aug 15 09:51:42 sofia kernel: [30269.724066] [<ffffffff810da65e>] ?
prune_icache_sb+0x2a7/0x2c2
Aug 15 09:51:42 sofia kernel: [30269.724086] [<ffffffff810c99e1>] ?
prune_super+0xcb/0x138
Aug 15 09:51:42 sofia kernel: [30269.724104] [<ffffffff8110276f>] ?
do_raw_spin_unlock.constprop.9+0xc/0xf
Aug 15 09:51:42 sofia kernel: [30269.724124] [<ffffffff8109b7d4>] ?
shrink_slab+0x120/0x19d
Aug 15 09:51:42 sofia kernel: [30269.724139] [<ffffffff8109d46f>] ?
do_try_to_free_pages+0x251/0x3ba
Aug 15 09:51:42 sofia kernel: [30269.724156] [<ffffffff8109d648>] ?
try_to_free_pages+0x70/0x75
Aug 15 09:51:42 sofia kernel: [30269.724172] [<ffffffff81097368>] ?
__alloc_pages_nodemask+0x4bf/0x773
Aug 15 09:51:42 sofia kernel: [30269.724191] [<ffffffff812fff66>] ?
kmalloc_large_node+0x4f/0x7f
Aug 15 09:51:42 sofia kernel: [30269.724204] [<ffffffff8126a4e1>] ?
__alloc_skb+0x6b/0x135
Aug 15 09:51:42 sofia kernel: [30269.724218] [<ffffffff81269103>] ?
sock_alloc_send_pskb+0xc7/0x2b5
Aug 15 09:51:42 sofia kernel: [30269.724234] [<ffffffff81005e67>] ?
get_phys_to_machine+0x12/0x5d
Aug 15 09:51:42 sofia kernel: [30269.724251] [<ffffffff81003b2a>] ?
mfn_to_pfn.part.24+0x52/0x77
Aug 15 09:51:42 sofia kernel: [30269.724271] [<ffffffff812db414>] ?
unix_stream_sendmsg+0x113/0x2b8
Aug 15 09:51:42 sofia kernel: [30269.724289] [<ffffffff8109557b>] ?
get_pageblock_flags_group+0x30/0x64
Aug 15 09:51:42 sofia kernel: [30269.724302] [<ffffffff81263de0>] ?
sock_aio_write+0xa3/0xbf
Aug 15 09:51:42 sofia kernel: [30269.724316] [<ffffffff81099e12>] ?
release_pages+0x120/0x12f
Aug 15 09:51:42 sofia kernel: [30269.724335] [<ffffffff810c6ec2>] ?
do_sync_write+0xae/0xe6
Aug 15 09:51:42 sofia kernel: [30269.724347] [<ffffffff810bf739>] ?
kmem_cache_free+0x11/0x69
Aug 15 09:51:42 sofia kernel: [30269.724361] [<ffffffff810aaed7>] ?
remove_vma+0x5c/0x63
Aug 15 09:51:42 sofia kernel: [30269.724371] [<ffffffff810ac047>] ?
do_munmap+0x2a7/0x2cf
Aug 15 09:51:42 sofia kernel: [30269.724385] [<ffffffff810c7634>] ?
vfs_write+0x9d/0xf8
Aug 15 09:51:42 sofia kernel: [30269.724396] [<ffffffff810c782f>] ?
sys_write+0x3e/0x6d
Aug 15 09:51:42 sofia kernel: [30269.724409] [<ffffffff81304979>] ?
system_call_fastpath+0x16/0x1b
Aug 15 09:51:42 sofia kernel: [30269.724421] ---[ end trace 17eb064ed1556a09
]---
Aug 15 09:51:42 sofia kernel: [30269.724428] ------------[ cut here
]------------
Aug 15 09:51:42 sofia kernel: [30269.724456] WARNING: at fs/btrfs/inode.c:6955
btrfs_destroy_inode+0x7b/0x26c [btrfs]()
Aug 15 09:51:42 sofia kernel: [30269.724470] Modules linked in: ipv6 btrfs
zram(C) nf_conntrack
Aug 15 09:51:42 sofia kernel: [30269.724487] Pid: 27751, comm: ssh Tainted: G
WC 2.6.44.7-dae-xen #2
Aug 15 09:51:42 sofia kernel: [30269.724499] Call Trace:
Aug 15 09:51:42 sofia kernel: [30269.724508] [<ffffffff8103c7cf>] ?
warn_slowpath_common+0x76/0x8a
Aug 15 09:51:42 sofia kernel: [30269.724536] [<ffffffffa00467a6>] ?
btrfs_destroy_inode+0x7b/0x26c [btrfs]
Aug 15 09:51:42 sofia kernel: [30269.724569] [<ffffffffa004672b>] ?
btrfs_alloc_inode+0x1d9/0x1d9 [btrfs]
Aug 15 09:51:42 sofia kernel: [30269.724582] [<ffffffff810d9943>] ?
dispose_list+0x27/0x31
Aug 15 09:51:42 sofia kernel: [30269.724591] [<ffffffff810da65e>] ?
prune_icache_sb+0x2a7/0x2c2
Aug 15 09:51:42 sofia kernel: [30269.724602] [<ffffffff810c99e1>] ?
prune_super+0xcb/0x138
Aug 15 09:51:42 sofia kernel: [30269.724611] [<ffffffff8110276f>] ?
do_raw_spin_unlock.constprop.9+0xc/0xf
Aug 15 09:51:42 sofia kernel: [30269.724622] [<ffffffff8109b7d4>] ?
shrink_slab+0x120/0x19d
Aug 15 09:51:42 sofia kernel: [30269.724632] [<ffffffff8109d46f>] ?
do_try_to_free_pages+0x251/0x3ba
Aug 15 09:51:42 sofia kernel: [30269.724643] [<ffffffff8109d648>] ?
try_to_free_pages+0x70/0x75
Aug 15 09:51:42 sofia kernel: [30269.724663] [<ffffffff81097368>] ?
__alloc_pages_nodemask+0x4bf/0x773
Aug 15 09:51:42 sofia kernel: [30269.724734] [<ffffffff812fff66>] ?
kmalloc_large_node+0x4f/0x7f
Aug 15 09:51:42 sofia kernel: [30269.724747] [<ffffffff8126a4e1>] ?
__alloc_skb+0x6b/0x135
Aug 15 09:51:42 sofia kernel: [30269.724758] [<ffffffff81269103>] ?
sock_alloc_send_pskb+0xc7/0x2b5
Aug 15 09:51:42 sofia kernel: [30269.724775] [<ffffffff81005e67>] ?
get_phys_to_machine+0x12/0x5d
Aug 15 09:51:42 sofia kernel: [30269.724786] [<ffffffff81003b2a>] ?
mfn_to_pfn.part.24+0x52/0x77
Aug 15 09:51:42 sofia kernel: [30269.724797] [<ffffffff812db414>] ?
unix_stream_sendmsg+0x113/0x2b8
Aug 15 09:51:42 sofia kernel: [30269.724805] [<ffffffff8109557b>] ?
get_pageblock_flags_group+0x30/0x64
Aug 15 09:51:42 sofia kernel: [30269.724813] [<ffffffff81263de0>] ?
sock_aio_write+0xa3/0xbf
Aug 15 09:51:42 sofia kernel: [30269.724819] [<ffffffff81099e12>] ?
release_pages+0x120/0x12f
Aug 15 09:51:42 sofia kernel: [30269.724827] [<ffffffff810c6ec2>] ?
do_sync_write+0xae/0xe6
Aug 15 09:51:42 sofia kernel: [30269.724834] [<ffffffff810bf739>] ?
kmem_cache_free+0x11/0x69
Aug 15 09:51:42 sofia kernel: [30269.724840] [<ffffffff810aaed7>] ?
remove_vma+0x5c/0x63
Aug 15 09:51:42 sofia kernel: [30269.724846] [<ffffffff810ac047>] ?
do_munmap+0x2a7/0x2cf
Aug 15 09:51:42 sofia kernel: [30269.724852] [<ffffffff810c7634>] ?
vfs_write+0x9d/0xf8
Aug 15 09:51:42 sofia kernel: [30269.724859] [<ffffffff810c782f>] ?
sys_write+0x3e/0x6d
Aug 15 09:51:42 sofia kernel: [30269.724865] [<ffffffff81304979>] ?
system_call_fastpath+0x16/0x1b
Aug 15 09:51:42 sofia kernel: [30269.724871] ---[ end trace 17eb064ed1556a0a
]---
Aug 15 09:51:42 sofia kernel: [30269.724876] ------------[ cut here
]------------
Aug 15 09:51:42 sofia kernel: [30269.724896] WARNING: at fs/btrfs/inode.c:6957
btrfs_destroy_inode+0xab/0x26c [btrfs]()
Aug 15 09:51:42 sofia kernel: [30269.724903] Modules linked in: ipv6 btrfs
zram(C) nf_conntrack
Aug 15 09:51:42 sofia kernel: [30269.724914] Pid: 27751, comm: ssh Tainted: G
WC 2.6.44.7-dae-xen #2
Aug 15 09:51:42 sofia kernel: [30269.724920] Call Trace:
Aug 15 09:51:42 sofia kernel: [30269.724925] [<ffffffff8103c7cf>] ?
warn_slowpath_common+0x76/0x8a
Aug 15 09:51:42 sofia kernel: [30269.724946] [<ffffffffa00467d6>] ?
btrfs_destroy_inode+0xab/0x26c [btrfs]
Aug 15 09:51:42 sofia kernel: [30269.724966] [<ffffffffa004672b>] ?
btrfs_alloc_inode+0x1d9/0x1d9 [btrfs]
Aug 15 09:51:42 sofia kernel: [30269.724974] [<ffffffff810d9943>] ?
dispose_list+0x27/0x31
Aug 15 09:51:42 sofia kernel: [30269.724980] [<ffffffff810da65e>] ?
prune_icache_sb+0x2a7/0x2c2
Aug 15 09:51:42 sofia kernel: [30269.724987] [<ffffffff810c99e1>] ?
prune_super+0xcb/0x138
Aug 15 09:51:42 sofia kernel: [30269.724993] [<ffffffff8110276f>] ?
do_raw_spin_unlock.constprop.9+0xc/0xf
Aug 15 09:51:42 sofia kernel: [30269.725001] [<ffffffff8109b7d4>] ?
shrink_slab+0x120/0x19d
Aug 15 09:51:42 sofia kernel: [30269.725008] [<ffffffff8109d46f>] ?
do_try_to_free_pages+0x251/0x3ba
Aug 15 09:51:42 sofia kernel: [30269.725015] [<ffffffff8109d648>] ?
try_to_free_pages+0x70/0x75
Aug 15 09:51:42 sofia kernel: [30269.725023] [<ffffffff81097368>] ?
__alloc_pages_nodemask+0x4bf/0x773
Aug 15 09:51:42 sofia kernel: [30269.725030] [<ffffffff812fff66>] ?
kmalloc_large_node+0x4f/0x7f
Aug 15 09:51:42 sofia kernel: [30269.925127] [<ffffffff8126a4e1>] ?
__alloc_skb+0x6b/0x135
Aug 15 09:51:42 sofia kernel: [30269.925150] [<ffffffff81269103>] ?
sock_alloc_send_pskb+0xc7/0x2b5
Aug 15 09:51:42 sofia kernel: [30269.925171] [<ffffffff81005e67>] ?
get_phys_to_machine+0x12/0x5d
Aug 15 09:51:42 sofia kernel: [30269.925190] [<ffffffff81003b2a>] ?
mfn_to_pfn.part.24+0x52/0x77
Aug 15 09:51:42 sofia kernel: [30269.925208] [<ffffffff812db414>] ?
unix_stream_sendmsg+0x113/0x2b8
Aug 15 09:51:42 sofia kernel: [30269.925226] [<ffffffff8109557b>] ?
get_pageblock_flags_group+0x30/0x64
Aug 15 09:51:42 sofia kernel: [30269.925241] [<ffffffff81263de0>] ?
sock_aio_write+0xa3/0xbf
Aug 15 09:51:42 sofia kernel: [30269.925259] [<ffffffff81099e12>] ?
release_pages+0x120/0x12f
Aug 15 09:51:42 sofia kernel: [30269.925276] [<ffffffff810c6ec2>] ?
do_sync_write+0xae/0xe6
Aug 15 09:51:42 sofia kernel: [30269.925292] [<ffffffff810bf739>] ?
kmem_cache_free+0x11/0x69
Aug 15 09:51:42 sofia kernel: [30269.925309] [<ffffffff810aaed7>] ?
remove_vma+0x5c/0x63
Aug 15 09:51:42 sofia kernel: [30269.925323] [<ffffffff810ac047>] ?
do_munmap+0x2a7/0x2cf
Aug 15 09:51:42 sofia kernel: [30269.925339] [<ffffffff810c7634>] ?
vfs_write+0x9d/0xf8
Aug 15 09:51:42 sofia kernel: [30269.925356] [<ffffffff810c782f>] ?
sys_write+0x3e/0x6d
Aug 15 09:51:42 sofia kernel: [30269.925373] [<ffffffff81304979>] ?
system_call_fastpath+0x16/0x1b
Aug 15 09:51:42 sofia kernel: [30269.925386] ---[ end trace 17eb064ed1556a0b
]---
But nothing about the umount (some hours later).
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