Chris Mason 89642229a5 Btrfs: Search data ordered extents first for checksums on read ... Checksum items are not inserted into the tree until all of the io from a given extent is complete. This means one dirty page from an extent may be written, freed, and then read again before the entire extent is on disk and the checksum item is inserted. The checksums themselves are stored in the ordered extent so they can be inserted in bulk when IO is complete. On read, if a checksum item isn't found, the ordered extents were being searched for a checksum record. This all worked most of the time, but the checksum insertion code tries to reduce the number of tree operations by pre-inserting checksum items based on i_size and a few other factors. This means the read code might find a checksum item that hasn't yet really been filled in. This commit changes things to check the ordered extents first and only dive into the btree if nothing was found. This removes the need for extra locking and is more reliable. Signed-off-by: Chris Mason <chris.mason@oracle.com>		2008-09-25 11:04:05 -04:00
..
COPYING	Btrfs: add GPLv2	2007-06-12 09:07:21 -04:00
INSTALL	Btrfs: Documentation update	2007-06-22 14:49:31 -04:00
Makefile	Btrfs: Start btree concurrency work.	2008-09-25 11:04:03 -04:00
TODO	Btrfs: add GPLv2	2007-06-12 09:07:21 -04:00
acl.c	Btrfs: Include sched.h in the acl code for current (fixes compile on 2.6.23)	2008-09-25 11:03:59 -04:00
async-thread.c	Btrfs: Worker thread optimizations	2008-09-25 11:04:03 -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	Add a per-inode lock around btrfs_drop_extents	2008-09-25 11:04:04 -04:00
compat.h	Btrfs: Add workaround for AppArmor changing remove_suid()	2008-09-25 11:04:02 -04:00
crc32c.h	Btrfs: Endianess bug fix for v0.13 with kernels	2008-09-25 11:04:01 -04:00
ctree.c	btrfs_next_leaf: do readahead when skip_locking is turned on	2008-09-25 11:04:04 -04:00
ctree.h	Btrfs: alloc_mutex latency reduction	2008-09-25 11:04:05 -04:00
dir-item.c	Btrfs: unaligned access fixes	2008-09-25 11:04:00 -04:00
disk-io.c	Btrfs: Search data ordered extents first for checksums on read	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-tree.c	Btrfs: alloc_mutex latency reduction	2008-09-25 11:04:05 -04:00
extent_io.c	Btrfs: Search data ordered extents first for checksums on read	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: Fix some data=ordered related data corruptions	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
file-item.c	Btrfs: Take the csum mutex while reading checksums	2008-09-25 11:04:05 -04:00
file.c	Btrfs: Fix some data=ordered related data corruptions	2008-09-25 11:04:05 -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: Add back pointers from the inode to the directory that references it	2008-09-25 11:03:58 -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: Search data ordered extents first for checksums on read	2008-09-25 11:04:05 -04:00
ioctl.c	Btrfs: Add locking around volume management (device add/remove/balance)	2008-09-25 11:04:04 -04:00
ioctl.h	Btrfs: transaction ioctls	2008-09-25 11:04:03 -04:00
locking.c	Btrfs: Use mutex_lock_nested for tree locking	2008-09-25 11:04:05 -04:00
locking.h	Btrfs: Start btree concurrency work.	2008-09-25 11:04:03 -04:00
ordered-data.c	Btrfs: Search data ordered extents first for checksums on read	2008-09-25 11:04:05 -04:00
ordered-data.h	Btrfs: Fix 32 bit compiles by using an unsigned long byte count in the ordered extent	2008-09-25 11:04:05 -04:00
print-tree.c	Btrfs: Pass down the expected generation number when reading tree blocks	2008-09-25 11:04:03 -04:00
print-tree.h	Btrfs: Create extent_buffer interface for large blocksizes	2008-09-25 11:03:56 -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: Online btree defragmentation fixes	2008-09-25 11:04:04 -04:00
sysfs.c	Btrfs: Disable sysfs files on older kernels	2008-09-25 11:04:00 -04:00
transaction.c	Btrfs: Take the csum mutex while reading checksums	2008-09-25 11:04:05 -04:00
transaction.h	btrfs_start_transaction: wait for commits in progress to finish	2008-09-25 11:04:04 -04:00
tree-defrag.c	Btrfs: Online btree defragmentation fixes	2008-09-25 11:04:04 -04:00
volumes.c	Btrfs: Add locking around volume management (device add/remove/balance)	2008-09-25 11:04:04 -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: Replace the big fs_mutex with a collection of other locks	2008-09-25 11:04:03 -04:00
xattr.h	xattr support for btrfs	2008-09-25 11:03:57 -04:00