Qu Wenruo 0bd9289c28 btrfs: Add threshold workqueue based on kernel workqueue ... The original btrfs_workers has thresholding functions to dynamically create or destroy kthreads. Though there is no such function in kernel workqueue because the worker is not created manually, we can still use the workqueue_set_max_active to simulated the behavior, mainly to achieve a better HDD performance by setting a high threshold on submit_workers. (Sadly, no resource can be saved) So in this patch, extra workqueue pending counters are introduced to dynamically change the max active of each btrfs_workqueue_struct, hoping to restore the behavior of the original thresholding function. Also, workqueue_set_max_active use a mutex to protect workqueue_struct, which is not meant to be called too frequently, so a new interval mechanism is applied, that will only call workqueue_set_max_active after a count of work is queued. Hoping to balance both the random and sequence performance on HDD. Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com> Tested-by: David Sterba <dsterba@suse.cz> Signed-off-by: Josef Bacik <jbacik@fb.com>		2014-03-10 15:17:04 -04:00
..
tests	Btrfs: convert printk to btrfs_ and fix BTRFS prefix	2014-01-28 13:20:05 -08:00
acl.c	btrfs: remove dead code	2014-01-28 13:19:50 -08:00
async-thread.c	btrfs: Add threshold workqueue based on kernel workqueue	2014-03-10 15:17:04 -04:00
async-thread.h	btrfs: Add threshold workqueue based on kernel workqueue	2014-03-10 15:17:04 -04:00
backref.c	Btrfs: skip locking when searching commit root	2014-03-10 15:16:55 -04:00
backref.h	Btrfs: allocate prelim_ref with a slab allocater	2013-09-01 08:16:27 -04:00
btrfs_inode.h	Btrfs: use signed integer instead of unsigned long integer for log transid	2014-03-10 15:16:42 -04:00
check-integrity.c	Btrfs: use btrfs_crc32c everywhere instead of libcrc32c	2014-02-03 09:01:27 -08:00
check-integrity.h	block: submit_bio_wait() conversions	2013-11-24 16:33:41 -07:00
compression.c	Btrfs: fix data corruption when reading/updating compressed extents	2014-02-08 17:57:15 -08:00
compression.h	btrfs: make static code static & remove dead code	2013-05-06 15:55:23 -04:00
ctree.c	Btrfs: correctly determine if blocks are shared in btrfs_compare_trees	2014-03-10 15:16:50 -04:00
ctree.h	Btrfs: just wait or commit our own log sub-transaction	2014-03-10 15:16:43 -04:00
delayed-inode.c	Btrfs: introduce the delayed inode ref deletion for the single link inode	2014-01-28 13:20:09 -08:00
delayed-inode.h	Btrfs: introduce the delayed inode ref deletion for the single link inode	2014-01-28 13:20:09 -08:00
delayed-ref.c	Btrfs: cleanup delayed-ref.c:find_ref_head()	2014-03-10 15:16:46 -04:00
delayed-ref.h	Btrfs: attach delayed ref updates to delayed ref heads	2014-01-28 13:20:25 -08:00
dev-replace.c	Btrfs: fix use-after-free in the finishing procedure of the device replace	2014-03-10 15:15:39 -04:00
dev-replace.h	Btrfs: add new sources for device replace code	2012-12-12 17:15:41 -05:00
dir-item.c	Btrfs: convert printk to btrfs_ and fix BTRFS prefix	2014-01-28 13:20:05 -08:00
disk-io.c	Btrfs: just wait or commit our own log sub-transaction	2014-03-10 15:16:43 -04:00
disk-io.h	Btrfs: add a sanity test for btrfs_split_item	2013-11-11 21:51:02 -05:00
export.c	btrfs: remove fs/btrfs/compat.h	2013-11-11 22:03:19 -05:00
export.h
extent_io.c	Btrfs: more efficient split extent state insertion	2014-03-10 15:16:57 -04:00
extent_io.h	Btrfs: move the extent buffer radix tree into the fs_info	2014-01-28 13:19:55 -08:00
extent_map.c	Btrfs: more efficient btrfs_drop_extent_cache	2014-03-10 15:16:57 -04:00
extent_map.h	Btrfs: more efficient btrfs_drop_extent_cache	2014-03-10 15:16:57 -04:00
extent-tree.c	Btrfs: don't loop forever if we can't run because of the tree mod log	2014-02-08 17:57:15 -08:00
file-item.c	Btrfs: convert printk to btrfs_ and fix BTRFS prefix	2014-01-28 13:20:05 -08:00
file.c	Btrfs: fix preallocate vs double nocow write	2014-03-10 15:17:00 -04:00
free-space-cache.c	Btrfs: convert printk to btrfs_ and fix BTRFS prefix	2014-01-28 13:20:05 -08:00
free-space-cache.h	Btrfs: remove path arg from btrfs_truncate_free_space_cache	2013-11-11 21:51:33 -05:00
hash.c	Btrfs: fix btrfs boot when compiled as built-in	2014-01-28 13:20:31 -08:00
hash.h	Btrfs: fix btrfs boot when compiled as built-in	2014-01-28 13:20:31 -08:00
inode-item.c	btrfs: cleanup: removed unused 'btrfs_get_inode_ref_index'	2014-01-28 13:19:39 -08:00
inode-map.c	btrfs: Use WARN_ON()'s return value in place of WARN_ON(1)	2013-11-11 22:11:53 -05:00
inode-map.h
inode.c	Btrfs: fix preallocate vs double nocow write	2014-03-10 15:17:00 -04:00
ioctl.c	btrfs: Fix 32/64-bit problem with BTRFS_SET_RECEIVED_SUBVOL ioctl	2014-03-10 15:15:40 -04:00
Kconfig	Btrfs: fix btrfs boot when compiled as built-in	2014-01-28 13:20:31 -08:00
locking.c	btrfs: make static code static & remove dead code	2013-05-06 15:55:23 -04:00
locking.h	Btrfs: remove btrfs_try_spin_lock	2013-03-14 14:57:10 -04:00
lzo.c	Btrfs: convert printk to btrfs_ and fix BTRFS prefix	2014-01-28 13:20:05 -08:00
Makefile	Btrfs: fix btrfs boot when compiled as built-in	2014-01-28 13:20:31 -08:00
math.h	Btrfs: cleanup duplicated division functions	2012-12-11 13:31:30 -05:00
ordered-data.c	Btrfs: don't mix the ordered extents of all files together during logging the inodes	2014-03-10 15:15:36 -04:00
ordered-data.h	Btrfs: don't mix the ordered extents of all files together during logging the inodes	2014-03-10 15:15:36 -04:00
orphan.c	btrfs: expand btrfs_find_item() to include find_orphan_item functionality	2014-01-28 13:19:37 -08:00
print-tree.c	Btrfs: don't use ram_bytes for uncompressed inline items	2014-01-29 07:06:29 -08:00
print-tree.h	btrfs: make static code static & remove dead code	2013-05-06 15:55:23 -04:00
props.c	Btrfs: add support for inode properties	2014-01-28 13:20:24 -08:00
props.h	Btrfs: add support for inode properties	2014-01-28 13:20:24 -08:00
qgroup.c	Btrfs: fix qgroup rescan to work with skinny metadata	2014-01-28 13:20:27 -08:00
raid56.c	btrfs: remove fs/btrfs/compat.h	2013-11-11 22:03:19 -05:00
raid56.h	Btrfs: RAID5 and RAID6	2013-02-01 14:24:23 -05:00
rcu-string.h	Btrfs: use rcu to protect device->name	2012-06-14 21:29:16 -04:00
reada.c	Btrfs: convert printk to btrfs_ and fix BTRFS prefix	2014-01-28 13:20:05 -08:00
relocation.c	Btrfs: fix an oops when we fail to relocate tree blocks	2014-01-28 13:20:14 -08:00
root-tree.c	btrfs: Use PTR_ERR_OR_ZERO	2014-03-10 15:16:51 -04:00
scrub.c	Btrfs: wake up @scrub_pause_wait as much as we can	2014-03-10 15:16:54 -04:00
send.c	Btrfs: skip search tree for REG files	2014-03-10 15:17:01 -04:00
send.h	btrfs: make static code static & remove dead code	2013-05-06 15:55:23 -04:00
struct-funcs.c	Btrfs: rewrite BTRFS_SETGET_FUNCS	2012-07-23 16:28:06 -04:00
super.c	btrfs: wake up transaction thread upon remount	2014-03-10 15:16:45 -04:00
sysfs.c	btrfs: add simple debugfs interface	2014-03-10 15:15:51 -04:00
sysfs.h	btrfs: add simple debugfs interface	2014-03-10 15:15:51 -04:00
transaction.c	Btrfs: cancel scrub on transaction abortion	2014-03-10 15:16:54 -04:00
transaction.h	Btrfs: make fsync latency less sucky	2014-01-28 13:20:25 -08:00
tree-defrag.c	Btrfs: cleanup dead code of defragment	2013-11-11 21:59:45 -05:00
tree-log.c	Btrfs: stop joining the log transaction if sync log fails	2014-03-10 15:16:44 -04:00
tree-log.h	Btrfs: just wait or commit our own log sub-transaction	2014-03-10 15:16:43 -04:00
ulist.c	Btrfs: do not export ulist functions	2014-01-29 07:06:27 -08:00
ulist.h	Btrfs: do not export ulist functions	2014-01-29 07:06:27 -08:00
uuid-tree.c	Btrfs: convert printk to btrfs_ and fix BTRFS prefix	2014-01-28 13:20:05 -08:00
volumes.c	btrfs: Cleanup the unused struct async_sched.	2014-03-10 15:17:02 -04:00
volumes.h	Btrfs: fix use-after-free in the finishing procedure of the device replace	2014-03-10 15:15:39 -04:00
xattr.c	Btrfs: add support for inode properties	2014-01-28 13:20:24 -08:00
xattr.h
zlib.c	Btrfs: convert printk to btrfs_ and fix BTRFS prefix	2014-01-28 13:20:05 -08:00