Chris Mason 323ac95bce Btrfs: don't read leaf blocks containing only checksums during truncate ... Checksum items take up a significant portion of the metadata for large files. It is possible to avoid reading them during truncates by checking the keys in the higher level nodes. If a given leaf is followed by another leaf where the lowest key is a checksum item from the same file, we know we can safely delete the leaf without reading it. For a 32GB file on a 6 drive raid0 array, Btrfs needs 8s to delete the file with a cold cache. It is read bound during the run. With this change, Btrfs is able to delete the file in 0.5s Signed-off-by: Chris Mason <chris.mason@oracle.com>		2008-10-01 19:05:46 -04:00
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acl.c	Btrfs: optimize btrget/set/removexattr	2008-09-25 11:04:07 -04:00
async-thread.c	Btrfs: fix multi-device code to use raid policies set by mkfs	2008-09-30 19:36:34 -04:00
async-thread.h	Btrfs: add and improve comments	2008-09-29 15:18:18 -04:00
btrfs_inode.h	Btrfs: add and improve comments	2008-09-29 15:18:18 -04:00
compat.h	Remove Btrfs compat code for older kernels	2008-09-25 15:41:59 -04:00
COPYING	Btrfs: add GPLv2	2007-06-12 09:07:21 -04:00
crc32c.h	Btrfs: add and improve comments	2008-09-29 15:18:18 -04:00
ctree.c	Btrfs: don't read leaf blocks containing only checksums during truncate	2008-10-01 19:05:46 -04:00
ctree.h	Btrfs: don't read leaf blocks containing only checksums during truncate	2008-10-01 19:05:46 -04:00
dir-item.c	Btrfs: add and improve comments	2008-09-29 15:18:18 -04:00
disk-io.c	Btrfs: disk-io.c (open_ctree): avoid leaks upon allocation failure	2008-10-01 19:09:51 -04:00
disk-io.h	Btrfs: Tree logging fixes	2008-09-25 11:04:07 -04:00
export.c	Remove Btrfs compat code for older kernels	2008-09-25 15:41:59 -04:00
export.h	NFS support for btrfs - v3	2008-09-25 11:04:06 -04:00
extent_io.c	Btrfs: add and improve comments	2008-09-29 15:18:18 -04:00
extent_io.h	Btrfs: extent_map and data=ordered fixes for space balancing	2008-09-26 10:05:38 -04:00
extent_map.c	Btrfs: add and improve comments	2008-09-29 15:18:18 -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: fix deadlock between alloc_mutex/chunk_mutex	2008-10-01 19:11:18 -04:00
file-item.c	Btrfs: Fix variable init during csum creation	2008-09-25 11:04:07 -04:00
file.c	Btrfs: add and improve comments	2008-09-29 15:18:18 -04:00
free-space-cache.c	Btrfs: Fix allocation completions in tree log replay	2008-09-25 15:41:59 -04:00
hash.h	Switch btrfs_name_hash() to crc32c	2008-09-25 11:04:06 -04:00
inode-item.c	Btrfs: Implement new dir index format	2008-09-25 11:04:05 -04:00
inode-map.c	Btrfs: extent_map and data=ordered fixes for space balancing	2008-09-26 10:05:38 -04:00
inode.c	Btrfs: don't read leaf blocks containing only checksums during truncate	2008-10-01 19:05:46 -04:00
INSTALL	Btrfs: Documentation update	2007-06-22 14:49:31 -04:00
ioctl.c	Btrfs: extent_map and data=ordered fixes for space balancing	2008-09-26 10:05:38 -04:00
ioctl.h	Btrfs: transaction ioctls	2008-09-25 11:04:03 -04:00
locking.c	Btrfs: add and improve comments	2008-09-29 15:18:18 -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 and improve comments	2008-09-29 15:18:18 -04:00
ordered-data.c	Btrfs: add and improve comments	2008-09-29 15:18:18 -04:00
ordered-data.h	Btrfs: Fix nodatacow for the new data=ordered mode	2008-09-25 11:04:06 -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: Full back reference support	2008-09-25 11:04:07 -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: add and improve comments	2008-09-29 15:18:18 -04:00
ref-cache.h	Btrfs: add and improve comments	2008-09-29 15:18:18 -04:00
root-tree.c	Btrfs: add and improve comments	2008-09-29 15:18:18 -04:00
struct-funcs.c	Btrfs: add and improve comments	2008-09-29 15:18:18 -04:00
super.c	Btrfs: add and improve comments	2008-09-29 15:18:18 -04:00
sysfs.c	Remove Btrfs compat code for older kernels	2008-09-25 15:41:59 -04:00
transaction.c	Btrfs: add and improve comments	2008-09-29 15:18:18 -04:00
transaction.h	Btrfs: Record dirty pages tree-log pages in an extent_io tree	2008-09-25 11:04:07 -04:00
tree-defrag.c	Btrfs: add and improve comments	2008-09-29 15:18:18 -04:00
tree-log.c	Btrfs: Full back reference support	2008-09-25 11:04:07 -04:00
tree-log.h	Btrfs: Add a write ahead tree log to optimize synchronous operations	2008-09-25 11:04:07 -04:00
version.h	Update Btrfs files for in-kernel usage	2008-09-25 15:41:59 -04:00
version.sh	Btrfs: Update version.sh to v0.16	2008-09-25 11:04:06 -04:00
volumes.c	Btrfs: Wait for IO on the block device inodes of newly added devices	2008-09-29 11:19:10 -04:00
volumes.h	Btrfs: Fix the multi-bio code to save the original bio for completion	2008-09-25 11:04:06 -04:00
xattr.c	Btrfs: optimize btrget/set/removexattr	2008-09-25 11:04:07 -04:00
xattr.h	Btrfs: optimize btrget/set/removexattr	2008-09-25 11:04:07 -04:00