forked from Minki/linux
2a85d9cac1
[13654.480669] ====================================================== [13654.480905] [ INFO: possible circular locking dependency detected ] [13654.481003] 3.12.0+ #4 Tainted: G W O [13654.481060] ------------------------------------------------------- [13654.481060] btrfs-transacti/9347 is trying to acquire lock: [13654.481060] (&(&root->ordered_extent_lock)->rlock){+.+...}, at: [<ffffffffa02d30a1>] btrfs_cleanup_transaction+0x271/0x570 [btrfs] [13654.481060] but task is already holding lock: [13654.481060] (&(&fs_info->ordered_root_lock)->rlock){+.+...}, at: [<ffffffffa02d3015>] btrfs_cleanup_transaction+0x1e5/0x570 [btrfs] [13654.481060] which lock already depends on the new lock. [13654.481060] the existing dependency chain (in reverse order) is: [13654.481060] -> #1 (&(&fs_info->ordered_root_lock)->rlock){+.+...}: [13654.481060] [<ffffffff810c4103>] lock_acquire+0x93/0x130 [13654.481060] [<ffffffff81689991>] _raw_spin_lock+0x41/0x50 [13654.481060] [<ffffffffa02f011b>] __btrfs_add_ordered_extent+0x39b/0x450 [btrfs] [13654.481060] [<ffffffffa02f0202>] btrfs_add_ordered_extent+0x32/0x40 [btrfs] [13654.481060] [<ffffffffa02df6aa>] run_delalloc_nocow+0x78a/0x9d0 [btrfs] [13654.481060] [<ffffffffa02dfc0d>] run_delalloc_range+0x31d/0x390 [btrfs] [13654.481060] [<ffffffffa02f7c00>] __extent_writepage+0x310/0x780 [btrfs] [13654.481060] [<ffffffffa02f830a>] extent_write_cache_pages.isra.29.constprop.48+0x29a/0x410 [btrfs] [13654.481060] [<ffffffffa02f879d>] extent_writepages+0x4d/0x70 [btrfs] [13654.481060] [<ffffffffa02d9f68>] btrfs_writepages+0x28/0x30 [btrfs] [13654.481060] [<ffffffff8114be91>] do_writepages+0x21/0x50 [13654.481060] [<ffffffff81140d49>] __filemap_fdatawrite_range+0x59/0x60 [13654.481060] [<ffffffff81140e13>] filemap_fdatawrite_range+0x13/0x20 [13654.481060] [<ffffffffa02f1db9>] btrfs_wait_ordered_range+0x49/0x140 [btrfs] [13654.481060] [<ffffffffa0318fe2>] __btrfs_write_out_cache+0x682/0x8b0 [btrfs] [13654.481060] [<ffffffffa031952d>] btrfs_write_out_cache+0x8d/0xe0 [btrfs] [13654.481060] [<ffffffffa02c7083>] btrfs_write_dirty_block_groups+0x593/0x680 [btrfs] [13654.481060] [<ffffffffa0345307>] commit_cowonly_roots+0x14b/0x20d [btrfs] [13654.481060] [<ffffffffa02d7c1a>] btrfs_commit_transaction+0x43a/0x9d0 [btrfs] [13654.481060] [<ffffffffa030061a>] btrfs_create_uuid_tree+0x5a/0x100 [btrfs] [13654.481060] [<ffffffffa02d5a8a>] open_ctree+0x21da/0x2210 [btrfs] [13654.481060] [<ffffffffa02ab6fe>] btrfs_mount+0x68e/0x870 [btrfs] [13654.481060] [<ffffffff811b2409>] mount_fs+0x39/0x1b0 [13654.481060] [<ffffffff811cd653>] vfs_kern_mount+0x63/0xf0 [13654.481060] [<ffffffff811cfcce>] do_mount+0x23e/0xa90 [13654.481060] [<ffffffff811d05a3>] SyS_mount+0x83/0xc0 [13654.481060] [<ffffffff81692b52>] system_call_fastpath+0x16/0x1b [13654.481060] -> #0 (&(&root->ordered_extent_lock)->rlock){+.+...}: [13654.481060] [<ffffffff810c340a>] __lock_acquire+0x150a/0x1a70 [13654.481060] [<ffffffff810c4103>] lock_acquire+0x93/0x130 [13654.481060] [<ffffffff81689991>] _raw_spin_lock+0x41/0x50 [13654.481060] [<ffffffffa02d30a1>] btrfs_cleanup_transaction+0x271/0x570 [btrfs] [13654.481060] [<ffffffffa02d35ce>] transaction_kthread+0x22e/0x270 [btrfs] [13654.481060] [<ffffffff81079efa>] kthread+0xea/0xf0 [13654.481060] [<ffffffff81692aac>] ret_from_fork+0x7c/0xb0 [13654.481060] other info that might help us debug this: [13654.481060] Possible unsafe locking scenario: [13654.481060] CPU0 CPU1 [13654.481060] ---- ---- [13654.481060] lock(&(&fs_info->ordered_root_lock)->rlock); [13654.481060] lock(&(&root->ordered_extent_lock)->rlock); [13654.481060] lock(&(&fs_info->ordered_root_lock)->rlock); [13654.481060] lock(&(&root->ordered_extent_lock)->rlock); [13654.481060] *** DEADLOCK *** [...] ====================================================== btrfs_destroy_all_ordered_extents() gets &fs_info->ordered_root_lock __BEFORE__ acquiring &root->ordered_extent_lock, while btrfs_[add,remove]_ordered_extent() acquires &fs_info->ordered_root_lock __AFTER__ getting &root->ordered_extent_lock. This patch fixes the above problem. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: Josef Bacik <jbacik@fb.com> |
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.. | ||
9p | ||
adfs | ||
affs | ||
afs | ||
autofs4 | ||
befs | ||
bfs | ||
btrfs | ||
cachefiles | ||
ceph | ||
cifs | ||
coda | ||
configfs | ||
cramfs | ||
debugfs | ||
devpts | ||
dlm | ||
ecryptfs | ||
efivarfs | ||
efs | ||
exofs | ||
exportfs | ||
ext2 | ||
ext3 | ||
ext4 | ||
f2fs | ||
fat | ||
freevxfs | ||
fscache | ||
fuse | ||
gfs2 | ||
hfs | ||
hfsplus | ||
hostfs | ||
hpfs | ||
hppfs | ||
hugetlbfs | ||
isofs | ||
jbd | ||
jbd2 | ||
jffs2 | ||
jfs | ||
lockd | ||
logfs | ||
minix | ||
ncpfs | ||
nfs | ||
nfs_common | ||
nfsd | ||
nilfs2 | ||
nls | ||
notify | ||
ntfs | ||
ocfs2 | ||
omfs | ||
openpromfs | ||
proc | ||
pstore | ||
qnx4 | ||
qnx6 | ||
quota | ||
ramfs | ||
reiserfs | ||
romfs | ||
squashfs | ||
sysfs | ||
sysv | ||
ubifs | ||
udf | ||
ufs | ||
xfs | ||
aio.c | ||
anon_inodes.c | ||
attr.c | ||
bad_inode.c | ||
binfmt_aout.c | ||
binfmt_elf_fdpic.c | ||
binfmt_elf.c | ||
binfmt_em86.c | ||
binfmt_flat.c | ||
binfmt_misc.c | ||
binfmt_script.c | ||
binfmt_som.c | ||
bio-integrity.c | ||
bio.c | ||
block_dev.c | ||
buffer.c | ||
char_dev.c | ||
compat_binfmt_elf.c | ||
compat_ioctl.c | ||
compat.c | ||
coredump.c | ||
coredump.h | ||
dcache.c | ||
dcookies.c | ||
direct-io.c | ||
drop_caches.c | ||
eventfd.c | ||
eventpoll.c | ||
exec.c | ||
fcntl.c | ||
fhandle.c | ||
file_table.c | ||
file.c | ||
filesystems.c | ||
fs_struct.c | ||
fs-writeback.c | ||
generic_acl.c | ||
inode.c | ||
internal.h | ||
ioctl.c | ||
ioprio.c | ||
Kconfig | ||
Kconfig.binfmt | ||
libfs.c | ||
locks.c | ||
Makefile | ||
mbcache.c | ||
mount.h | ||
mpage.c | ||
namei.c | ||
namespace.c | ||
no-block.c | ||
open.c | ||
pipe.c | ||
pnode.c | ||
pnode.h | ||
posix_acl.c | ||
proc_namespace.c | ||
read_write.c | ||
readdir.c | ||
select.c | ||
seq_file.c | ||
signalfd.c | ||
splice.c | ||
stack.c | ||
stat.c | ||
statfs.c | ||
super.c | ||
sync.c | ||
timerfd.c | ||
utimes.c | ||
xattr_acl.c | ||
xattr.c |