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65b51a009e
android_kernel_xiaomi_sm8350/fs/btrfs
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Chris Mason 65b51a009e btrfs_search_slot: reduce lock contention by cowing in two stages 
A btree block cow has two parts, the first is to allocate a destination
block and the second is to copy the old bock over.

The first part needs locks in the extent allocation tree, and may need to
do IO.  This changeset splits that into a separate function that can be
called without any tree locks held.

btrfs_search_slot is changed to drop its path and start over if it has
to COW a contended block.  This often means that many writers will
pre-alloc a new destination for a the same contended block, but they
cache their prealloc for later use on lower levels in the tree.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
2008-09-25 11:04:06 -04:00
..
acl.c Btrfs: Add ACL support 2008-09-25 11:04:05 -04:00
async-thread.c Btrfs: Fix streaming read performance with checksumming on 2008-09-25 11:04:05 -04:00
async-thread.h Btrfs: Worker thread optimizations 2008-09-25 11:04:03 -04:00
bit-radix.c Btrfs: trivial include fixups 2007-07-11 10:00:37 -04:00
bit-radix.h Btrfs: add GPLv2 2007-06-12 09:07:21 -04:00
btrfs_inode.h Btrfs: Create orphan inode records to prevent lost files after a crash 2008-09-25 11:04:05 -04:00
compat.h Btrfs: Add workaround for AppArmor changing remove_suid() 2008-09-25 11:04:02 -04:00
COPYING Btrfs: add GPLv2 2007-06-12 09:07:21 -04:00
crc32c.h Btrfs: Endianess bug fix for v0.13 with kernels 2008-09-25 11:04:01 -04:00
ctree.c btrfs_search_slot: reduce lock contention by cowing in two stages 2008-09-25 11:04:06 -04:00
ctree.h btrfs_search_slot: reduce lock contention by cowing in two stages 2008-09-25 11:04:06 -04:00
dir-item.c Btrfs: implement memory reclaim for leaf reference cache 2008-09-25 11:04:05 -04:00
disk-io.c Btrfs: Fix streaming read performance with checksumming on 2008-09-25 11:04:05 -04:00
disk-io.h Btrfs: Online btree defragmentation fixes 2008-09-25 11:04:04 -04:00
extent_io.c Btrfs: Add compatibility for kernels >= 2.6.27-rc1 2008-09-25 11:04:05 -04:00
extent_io.h Btrfs: Fix some data=ordered related data corruptions 2008-09-25 11:04:05 -04:00
extent_map.c Btrfs: Use assert_spin_locked instead of spin_trylock 2008-09-25 11:04:05 -04:00
extent_map.h Btrfs: Fix some data=ordered related data corruptions 2008-09-25 11:04:05 -04:00
extent-tree.c btrfs_search_slot: reduce lock contention by cowing in two stages 2008-09-25 11:04:06 -04:00
file-item.c Btrfs: Fix streaming read performance with checksumming on 2008-09-25 11:04:05 -04:00
file.c Btrfs: Improve and cleanup locking done by walk_down_tree 2008-09-25 11:04:06 -04:00
hash.c btrfs-progs: Stop stomping on 'name' input parameter 2008-09-25 11:04:01 -04:00
hash.h Btrfs: unaligned access fixes 2008-09-25 11:04:00 -04:00
inode-item.c Btrfs: Implement new dir index format 2008-09-25 11:04:05 -04:00
inode-map.c Btrfs: Replace the big fs_mutex with a collection of other locks 2008-09-25 11:04:03 -04:00
inode.c Btrfs: Drop some debugging around the extent_map pinned flag 2008-09-25 11:04:05 -04:00
INSTALL Btrfs: Documentation update 2007-06-22 14:49:31 -04:00
ioctl.c Btrfs: Improve and cleanup locking done by walk_down_tree 2008-09-25 11:04:06 -04:00
ioctl.h Btrfs: transaction ioctls 2008-09-25 11:04:03 -04:00
locking.c btrfs_search_slot: reduce lock contention by cowing in two stages 2008-09-25 11:04:06 -04:00
locking.h btrfs_search_slot: reduce lock contention by cowing in two stages 2008-09-25 11:04:06 -04:00
Makefile Btrfs: Add a leaf reference cache 2008-09-25 11:04:05 -04:00
ordered-data.c Btrfs: Fix the defragmention code and the block relocation code for data=ordered 2008-09-25 11:04:05 -04:00
ordered-data.h Btrfs: Fix the defragmention code and the block relocation code for data=ordered 2008-09-25 11:04:05 -04:00
orphan.c Btrfs: Create orphan inode records to prevent lost files after a crash 2008-09-25 11:04:05 -04:00
print-tree.c Btrfs: implement memory reclaim for leaf reference cache 2008-09-25 11:04:05 -04:00
print-tree.h Btrfs: Create extent_buffer interface for large blocksizes 2008-09-25 11:03:56 -04:00
ref-cache.c Btrfs: implement memory reclaim for leaf reference cache 2008-09-25 11:04:05 -04:00
ref-cache.h Btrfs: implement memory reclaim for leaf reference cache 2008-09-25 11:04:05 -04:00
root-tree.c Btrfs: Fix deadlock while searching for dead roots on mount 2008-09-25 11:04:04 -04:00
struct-funcs.c Btrfs: unaligned access fixes 2008-09-25 11:04:00 -04:00
super.c Btrfs: Add ACL support 2008-09-25 11:04:05 -04:00
sysfs.c Btrfs: Disable sysfs files on older kernels 2008-09-25 11:04:00 -04:00
TODO Btrfs: add GPLv2 2007-06-12 09:07:21 -04:00
transaction.c btrfs_search_slot: reduce lock contention by cowing in two stages 2008-09-25 11:04:06 -04:00
transaction.h Btrfs: Update and fix mount -o nodatacow 2008-09-25 11:04:05 -04:00
tree-defrag.c Btrfs: Online btree defragmentation fixes 2008-09-25 11:04:04 -04:00
version.sh Btrfs: Fix version.sh when used outside of an hg repo 2008-09-25 11:04:05 -04:00
volumes.c Btrfs: Hold a reference on bios during submit_bio, add some extra bio checks 2008-09-25 11:04:05 -04:00
volumes.h Btrfs: Add async worker threads for pre and post IO checksumming 2008-09-25 11:04:03 -04:00
xattr.c Btrfs: Add ACL support 2008-09-25 11:04:05 -04:00
xattr.h xattr support for btrfs 2008-09-25 11:03:57 -04:00