AcoSail/kernel_optimize_test
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a6d8654d88
kernel_optimize_test/fs/btrfs
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Filipe Manana a6d8654d88 Btrfs: fix deadlock when using free space tree due to block group creation 
When modifying the free space tree we can end up COWing one of its extent
buffers which in turn might result in allocating a new chunk, which in
turn can result in flushing (finish creation) of pending block groups. If
that happens we can deadlock because creating a pending block group needs
to update the free space tree, and if any of the updates tries to modify
the same extent buffer that we are COWing, we end up in a deadlock since
we try to write lock twice the same extent buffer.

So fix this by skipping pending block group creation if we are COWing an
extent buffer from the free space tree. This is a case missed by commit
5ce555578e ("Btrfs: fix deadlock when writing out free space caches").

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=202173
Fixes: 5ce555578e ("Btrfs: fix deadlock when writing out free space caches")
CC: stable@vger.kernel.org # 4.18+
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2019-01-09 14:52:36 +01:00
..
tests btrfs: remove always true if branch in find_delalloc_range 2018-12-17 14:51:44 +01:00
acl.c btrfs: remove unnecessary curly braces in btrfs_get_acl 2018-08-06 13:12:41 +02:00
async-thread.c
async-thread.h
backref.c btrfs: Fix typos in comments and strings 2018-12-17 14:51:50 +01:00
backref.h
btrfs_inode.h Btrfs: fix fsync of files with multiple hard links in new directories 2018-12-17 14:51:43 +01:00
check-integrity.c btrfs: Fix typos in comments and strings 2018-12-17 14:51:50 +01:00
check-integrity.h
compression.c btrfs: Fix typos in comments and strings 2018-12-17 14:51:50 +01:00
compression.h btrfs: compression: Add linux/sizes.h for compression.h 2018-05-29 18:13:00 +02:00
ctree.c Btrfs: fix deadlock when using free space tree due to block group creation 2019-01-09 14:52:36 +01:00
ctree.h btrfs: catch cow on deleting snapshots 2018-12-17 14:51:48 +01:00
dedupe.h
delayed-inode.c Btrfs: kill btrfs_clear_path_blocking 2018-10-15 17:23:38 +02:00
delayed-inode.h Btrfs: delayed-inode: use rb_first_cached for ins_root and del_root 2018-10-15 17:23:33 +02:00
delayed-ref.c btrfs: introduce delayed_refs_rsv 2018-12-17 14:51:46 +01:00
delayed-ref.h btrfs: add btrfs_delete_ref_head helper 2018-12-17 14:51:46 +01:00
dev-replace.c btrfs: Fix typos in comments and strings 2018-12-17 14:51:50 +01:00
dev-replace.h btrfs: dev-replace: open code trivial locking helpers 2018-12-17 14:51:45 +01:00
dir-item.c btrfs: Remove root parameter from btrfs_insert_dir_item 2018-10-15 17:23:25 +02:00
disk-io.c btrfs: Fix typos in comments and strings 2018-12-17 14:51:50 +01:00
disk-io.h btrfs: drop extra enum initialization where using defaults 2018-12-17 14:51:43 +01:00
export.c btrfs: Remove 'objectid' member from struct btrfs_root 2018-10-15 17:23:25 +02:00
export.h
extent_io.c btrfs: Fix typos in comments and strings 2018-12-17 14:51:50 +01:00
extent_io.h btrfs: Fix typos in comments and strings 2018-12-17 14:51:50 +01:00
extent_map.c btrfs: Fix typos in comments and strings 2018-12-17 14:51:50 +01:00
extent_map.h btrfs: switch EXTENT_FLAG_* to enums 2018-12-17 14:51:43 +01:00
extent-tree.c btrfs: Fix typos in comments and strings 2018-12-17 14:51:50 +01:00
file-item.c btrfs: replace btrfs_io_bio::end_io with a simple helper 2018-12-17 14:51:40 +01:00
file.c btrfs: Fix typos in comments and strings 2018-12-17 14:51:50 +01:00
free-space-cache.c Btrfs: fix deadlock on tree root leaf when finding free extent 2018-11-06 16:42:32 +01:00
free-space-cache.h
free-space-tree.c btrfs: use EXPORT_FOR_TESTS for conditionally exported functions 2018-12-17 14:51:37 +01:00
free-space-tree.h btrfs: Remove fs_info argument from add_to_free_space_tree 2018-05-28 18:07:36 +02:00
inode-item.c
inode-map.c btrfs: prune unused includes 2018-08-06 13:12:43 +02:00
inode-map.h
inode.c btrfs: Fix typos in comments and strings 2018-12-17 14:51:50 +01:00
ioctl.c Btrfs: fix race between reflink/dedupe and relocation 2019-01-09 14:52:25 +01:00
Kconfig
locking.c btrfs: replace waitqueue_actvie with cond_wake_up 2018-05-28 18:23:09 +02:00
locking.h
lzo.c btrfs: Fix typos in comments and strings 2018-12-17 14:51:50 +01:00
Makefile
math.h
ordered-data.c Btrfs: remove no longer used stuff for tracking pending ordered extents 2018-12-17 14:51:25 +01:00
ordered-data.h btrfs: switch BTRFS_ORDERED_* to enums 2018-12-17 14:51:43 +01:00
orphan.c
print-tree.c btrfs: annotate unlikely branches after V0 extent type removal 2018-08-06 13:12:41 +02:00
print-tree.h
props.c
props.h
qgroup.c btrfs: Fix typos in comments and strings 2018-12-17 14:51:50 +01:00
qgroup.h btrfs: Fix typos in comments and strings 2018-12-17 14:51:50 +01:00
raid56.c btrfs: Fix typos in comments and strings 2018-12-17 14:51:50 +01:00
raid56.h
rcu-string.h
reada.c btrfs: dev-replace: open code trivial locking helpers 2018-12-17 14:51:45 +01:00
ref-verify.c btrfs: Fix typos in comments and strings 2018-12-17 14:51:50 +01:00
ref-verify.h
relocation.c btrfs: Fix typos in comments and strings 2018-12-17 14:51:50 +01:00
root-tree.c btrfs: Remove fs_info from btrfs_add_root_ref 2018-08-06 13:13:00 +02:00
scrub.c btrfs: Fix typos in comments and strings 2018-12-17 14:51:50 +01:00
send.c btrfs: Fix typos in comments and strings 2018-12-17 14:51:50 +01:00
send.h
struct-funcs.c btrfs: prune unused includes 2018-08-06 13:12:43 +02:00
super.c btrfs: Fix typos in comments and strings 2018-12-17 14:51:50 +01:00
sysfs.c btrfs: Add sysfs support for metadata_uuid feature 2018-12-17 14:51:37 +01:00
sysfs.h btrfs: drop extra enum initialization where using defaults 2018-12-17 14:51:43 +01:00
transaction.c btrfs: Fix typos in comments and strings 2018-12-17 14:51:50 +01:00
transaction.h btrfs: drop extra enum initialization where using defaults 2018-12-17 14:51:43 +01:00
tree-checker.c btrfs: Fix typos in comments and strings 2018-12-17 14:51:50 +01:00
tree-checker.h
tree-defrag.c
tree-log.c btrfs: Fix typos in comments and strings 2018-12-17 14:51:50 +01:00
tree-log.h Btrfs: remove no longer used io_err from btrfs_log_ctx 2018-12-17 14:51:31 +01:00
ulist.c
ulist.h
uuid-tree.c btrfs: Remove fs_info argument from btrfs_uuid_tree_rem 2018-05-30 16:46:53 +02:00
volumes.c btrfs: Fix typos in comments and strings 2018-12-17 14:51:50 +01:00
volumes.h btrfs: remove btrfs_bio_end_io_t 2018-12-17 14:51:40 +01:00
xattr.c Btrfs: use nofs context when initializing security xattrs to avoid deadlock 2018-12-17 14:51:49 +01:00
xattr.h
zlib.c
zstd.c