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8d91012528
linux/fs/btrfs
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Jan Kara 8d91012528 btrfs: Make flush bios explicitely sync 
Commit b685d3d65a "block: treat REQ_FUA and REQ_PREFLUSH as
synchronous" removed REQ_SYNC flag from WRITE_{FUA|PREFLUSH|...}
definitions.  generic_make_request_checks() however strips REQ_FUA and
REQ_PREFLUSH flags from a bio when the storage doesn't report volatile
write cache and thus write effectively becomes asynchronous which can
lead to performance regressions

Fix the problem by making sure all bios which are synchronous are
properly marked with REQ_SYNC.

CC: David Sterba <dsterba@suse.com>
CC: linux-btrfs@vger.kernel.org
Fixes: b685d3d65a
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2017-05-16 15:42:01 +02:00
..
tests btrfs: remove unused qgroup members from btrfs_trans_handle 2017-04-18 14:07:25 +02:00
acl.c posix_acl: Clear SGID bit when setting file permissions 2016-09-22 10:55:32 +02:00
async-thread.c btrfs: fix crash when tracepoint arguments are freed by wq callbacks 2017-01-09 11:24:50 +01:00
async-thread.h btrfs: limit async_work allocation and worker func duration 2016-12-13 11:01:30 -08:00
backref.c btrfs: replace hardcoded value with SEQ_LAST macro 2017-04-18 14:07:25 +02:00
backref.h
btrfs_inode.h Btrfs: fix reported number of inode blocks 2017-04-26 16:27:26 +01:00
check-integrity.c btrfs: take an fs_info directly when the root is not used otherwise 2016-12-06 16:06:59 +01:00
check-integrity.h btrfs: take an fs_info directly when the root is not used otherwise 2016-12-06 16:06:59 +01:00
compression.c btrfs: convert compressed_bio.pending_bios from atomic_t to refcount_t 2017-04-18 14:07:24 +02:00
compression.h btrfs: derive maximum output size in the compression implementation 2017-02-28 14:26:36 +01:00
ctree.c btrfs: sink GFP flags parameter to tree_mod_log_insert_root 2017-04-18 14:07:26 +02:00
ctree.h btrfs: scrub: Introduce full stripe lock for RAID56 2017-04-18 14:07:27 +02:00
dedupe.h btrfs: expand cow_file_range() to support in-band dedup and subpage-blocksize 2016-07-26 13:52:25 +02:00
delayed-inode.c btrfs: convert btrfs_delayed_item.refs from atomic_t to refcount_t 2017-04-18 14:07:23 +02:00
delayed-inode.h btrfs: convert btrfs_delayed_item.refs from atomic_t to refcount_t 2017-04-18 14:07:23 +02:00
delayed-ref.c btrfs: convert btrfs_delayed_ref_node.refs from atomic_t to refcount_t 2017-04-18 14:07:23 +02:00
delayed-ref.h btrfs: convert btrfs_delayed_ref_node.refs from atomic_t to refcount_t 2017-04-18 14:07:23 +02:00
dev-replace.c Btrfs: switch to div64_u64 if with a u64 divisor 2017-04-18 14:07:26 +02:00
dev-replace.h btrfs: constify device path passed to relevant helpers 2017-02-28 14:26:07 +01:00
dir-item.c btrfs: do proper error handling in btrfs_insert_xattr_item 2017-02-28 14:27:11 +01:00
disk-io.c btrfs: Make flush bios explicitely sync 2017-05-16 15:42:01 +02:00
disk-io.h btrfs: convert btrfs_root.refs from atomic_t to refcount_t 2017-04-18 14:07:23 +02:00
export.c btrfs: Make btrfs_ino take a struct btrfs_inode 2017-02-14 15:50:51 +01:00
export.h
extent_io.c btrfs: fiemap: Cache and merge fiemap extent before submit it to user 2017-05-16 15:41:53 +02:00
extent_io.h Merge branch 'for-chris-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/fdmanana/linux into for-linus-4.12 2017-04-27 14:13:09 -07:00
extent_map.c btrfs: convert extent_map.refs from atomic_t to refcount_t 2017-04-18 14:07:23 +02:00
extent_map.h btrfs: convert extent_map.refs from atomic_t to refcount_t 2017-04-18 14:07:23 +02:00
extent-tree.c btrfs: scrub: Introduce full stripe lock for RAID56 2017-04-18 14:07:27 +02:00
file-item.c Merge branch 'for-chris-4.11-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux into for-linus-4.11 2017-02-28 14:35:09 -08:00
file.c Merge branch 'for-chris-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/fdmanana/linux into for-linus-4.12 2017-04-27 14:13:09 -07:00
free-space-cache.c btrfs: use clear_page where appropriate 2017-04-18 14:07:26 +02:00
free-space-cache.h btrfs: free-space-cache, clean up unnecessary root arguments 2017-02-17 12:03:56 +01:00
free-space-tree.c btrfs: remove unused parameter from clean_tree_block 2017-02-17 12:03:51 +01:00
free-space-tree.h
hash.c btrfs: advertise which crc32c implementation is being used at module load 2016-06-06 14:08:28 +02:00
hash.h btrfs: advertise which crc32c implementation is being used at module load 2016-06-06 14:08:28 +02:00
inode-item.c btrfs: take an fs_info directly when the root is not used otherwise 2016-12-06 16:06:59 +01:00
inode-map.c btrfs: all btrfs_delalloc_release_metadata take btrfs_inode 2017-02-28 11:30:07 +01:00
inode-map.h
inode.c Merge branch 'for-chris-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/fdmanana/linux into for-linus-4.12 2017-04-27 14:13:09 -07:00
ioctl.c btrfs: track exclusive filesystem operation in flags 2017-04-18 14:07:25 +02:00
Kconfig
locking.c
locking.h
lzo.c btrfs: derive maximum output size in the compression implementation 2017-02-28 14:26:36 +01:00
Makefile
math.h
ordered-data.c btrfs: convert btrfs_ordered_extent.refs from atomic_t to refcount_t 2017-04-18 14:07:23 +02:00
ordered-data.h btrfs: convert btrfs_ordered_extent.refs from atomic_t to refcount_t 2017-04-18 14:07:23 +02:00
orphan.c
print-tree.c btrfs: take an fs_info directly when the root is not used otherwise 2016-12-06 16:06:59 +01:00
print-tree.h btrfs: take an fs_info directly when the root is not used otherwise 2016-12-06 16:06:59 +01:00
props.c btrfs: Make btrfs_ino take a struct btrfs_inode 2017-02-14 15:50:51 +01:00
props.h
qgroup.c btrfs: qgroup: Re-arrange tracepoint timing to co-operate with reserved space tracepoint 2017-04-18 14:07:26 +02:00
qgroup.h btrfs: qgroup: Re-arrange tracepoint timing to co-operate with reserved space tracepoint 2017-04-18 14:07:26 +02:00
raid56.c btrfs: Wait for in-flight bios before freeing target device for raid56 2017-04-18 14:07:26 +02:00
raid56.h btrfs: take an fs_info directly when the root is not used otherwise 2016-12-06 16:06:59 +01:00
rcu-string.h
reada.c btrfs: remove local blocksize variable in reada_find_extent 2017-04-18 14:07:25 +02:00
relocation.c btrfs: Make btrfs_orphan_add take btrfs_inode 2017-02-28 11:30:10 +01:00
root-tree.c btrfs: Use ktime_get_real_ts for root ctime 2017-04-18 14:07:27 +02:00
scrub.c btrfs: scrub: Fix RAID56 recovery race condition 2017-04-18 14:07:27 +02:00
send.c Btrfs: send, fix file hole not being preserved due to inline extent 2017-04-26 16:27:25 +01:00
send.h
struct-funcs.c btrfs: fix string and comment grammatical issues and typos 2016-05-25 22:35:14 +02:00
super.c btrfs: No need to check !(flags & MS_RDONLY) twice 2017-04-18 14:07:25 +02:00
sysfs.c btrfs: convert printk(KERN_* to use pr_* calls 2016-09-26 18:08:44 +02:00
sysfs.h
transaction.c btrfs: qgroup: Fix qgroup corruption caused by inode_cache mount option 2017-04-18 14:07:26 +02:00
transaction.h btrfs: remove unused qgroup members from btrfs_trans_handle 2017-04-18 14:07:25 +02:00
tree-defrag.c
tree-log.c btrfs: convert extent_map.refs from atomic_t to refcount_t 2017-04-18 14:07:23 +02:00
tree-log.h btrfs: Make btrfs_del_inode_ref take btrfs_inode 2017-02-14 15:50:54 +01:00
ulist.c btrfs: ulist: rename ulist_fini to ulist_release 2017-02-17 12:03:50 +01:00
ulist.h btrfs: ulist: rename ulist_fini to ulist_release 2017-02-17 12:03:50 +01:00
uuid-tree.c btrfs: return the actual error value from from btrfs_uuid_tree_iterate 2016-12-19 18:08:15 +01:00
volumes.c btrfs: fix the gfp_mask for the reada_zones radix tree 2017-05-04 16:56:11 -07:00
volumes.h btrfs: delete unused member nobarriers 2017-04-18 16:12:07 +02:00
xattr.c btrfs: fix over-80 lines introduced by previous cleanups 2017-02-14 15:50:57 +01:00
xattr.h btrfs: Switch to generic xattr handlers 2016-05-17 19:17:09 -04:00
zlib.c btrfs: derive maximum output size in the compression implementation 2017-02-28 14:26:36 +01:00