AcoSail/kernel_optimize_test
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35054394c4
kernel_optimize_test/fs/btrfs
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Chris Mason 35054394c4 Btrfs: stop providing a bmap operation to avoid swapfile corruptions 
Swapfiles use bmap to build a list of extents belonging to the file,
and they assume these extents won't change over the life of the file.
They also use resulting list to do IO directly to the block device.

This causes problems for btrfs in a few ways:

btrfs returns logical block numbers through bmap, and these are not suitable
for IO.  They might translate to different devices, raid etc.

COW means that file block mappings are going to change frequently.

Using swapfiles on btrfs will lead to corruption, so we're avoiding the
problem for now by dropping bmap support entirely.  A later commit
will add fiemap support for people that really want to know how
a file is laid out.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
2009-01-21 13:11:13 -05:00
..
acl.c Btrfs: Fix checkpatch.pl warnings 2009-01-05 21:25:51 -05:00
async-thread.c Btrfs: removed unused #include <version.h>'s 2009-01-21 10:49:16 -05:00
async-thread.h Btrfs: Add ordered async work queues 2008-11-06 22:03:00 -05:00
btrfs_inode.h Btrfs: fix leaking block group on balance 2008-12-11 16:30:39 -05:00
compat.h Btrfs: drop remaining LINUX_KERNEL_VERSION checks and compat code 2009-01-06 09:38:55 -05:00
compression.c Btrfs: removed unused #include <version.h>'s 2009-01-21 10:49:16 -05:00
compression.h Btrfs: Add zlib compression support 2008-10-29 14:49:59 -04:00
crc32c.h Btrfs: Drop the hardware crc32c asm code 2009-01-07 19:56:59 -05:00
ctree.c Btrfs: Fix checkpatch.pl warnings 2009-01-05 21:25:51 -05:00
ctree.h Btrfs: fix tree logs parallel sync 2009-01-21 12:54:03 -05:00
dir-item.c Btrfs: Fix checkpatch.pl warnings 2009-01-05 21:25:51 -05:00
disk-io.c Btrfs: fix tree logs parallel sync 2009-01-21 12:54:03 -05:00
disk-io.h Btrfs: fix tree logs parallel sync 2009-01-21 12:54:03 -05:00
export.c Btrfs: Fix checkpatch.pl warnings 2009-01-05 21:25:51 -05:00
export.h NFS support for btrfs - v3 2008-09-25 11:04:06 -04:00
extent_io.c Btrfs: removed unused #include <version.h>'s 2009-01-21 10:49:16 -05:00
extent_io.h Btrfs: fix nodatasum handling in balancing code 2008-12-12 10:03:38 -05:00
extent_map.c Btrfs: removed unused #include <version.h>'s 2009-01-21 10:49:16 -05:00
extent_map.h Btrfs: Fix csum error for compressed data 2008-11-10 07:34:43 -05:00
extent-tree.c Btrfs: fix tree logs parallel sync 2009-01-21 12:54:03 -05:00
file-item.c Btrfs: tree logging checksum fixes 2009-01-06 11:42:00 -05:00
file.c Btrfs: fix tree logs parallel sync 2009-01-21 12:54:03 -05:00
free-space-cache.c Btrfs: Fix checkpatch.pl warnings 2009-01-05 21:25:51 -05:00
hash.h Switch btrfs_name_hash() to crc32c 2008-09-25 11:04:06 -04:00
inode-item.c Btrfs: make things static and include the right headers 2008-12-02 09:54:17 -05:00
inode-map.c Btrfs: Fix checkpatch.pl warnings 2009-01-05 21:25:51 -05:00
inode.c Btrfs: stop providing a bmap operation to avoid swapfile corruptions 2009-01-21 13:11:13 -05:00
ioctl.c Btrfs: removed unused #include <version.h>'s 2009-01-21 10:49:16 -05:00
ioctl.h Btrfs: fix ioctl arg size (userland incompatible change!) 2009-01-16 11:59:08 -05:00
locking.c Btrfs: Fix checkpatch.pl warnings 2009-01-05 21:25:51 -05:00
locking.h btrfs_search_slot: reduce lock contention by cowing in two stages 2008-09-25 11:04:06 -04:00
Makefile Btrfs: Add zlib compression support 2008-10-29 14:49:59 -04:00
ordered-data.c Btrfs: simplify iteration codes 2009-01-21 10:59:08 -05:00
ordered-data.h Btrfs: move data checksumming into a dedicated tree 2008-12-08 16:58:54 -05:00
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: Fix checkpatch.pl warnings 2009-01-05 21:25:51 -05:00
print-tree.h Btrfs: Create extent_buffer interface for large blocksizes 2008-09-25 11:03:56 -04:00
ref-cache.c Btrfs: Fix checkpatch.pl warnings 2009-01-05 21:25:51 -05:00
ref-cache.h Btrfs: add and improve comments 2008-09-29 15:18:18 -04:00
root-tree.c Btrfs: Fix checkpatch.pl warnings 2009-01-05 21:25:51 -05:00
struct-funcs.c Btrfs: Fix checkpatch.pl warnings 2009-01-05 21:25:51 -05:00
super.c Btrfs: removed unused #include <version.h>'s 2009-01-21 10:49:16 -05:00
sysfs.c Btrfs: Fix checkpatch.pl warnings 2009-01-05 21:25:51 -05:00
transaction.c Btrfs: simplify iteration codes 2009-01-21 10:59:08 -05:00
transaction.h Btrfs: Fix checkpatch.pl warnings 2009-01-05 21:25:51 -05:00
tree-defrag.c Btrfs: Fix checkpatch.pl warnings 2009-01-05 21:25:51 -05:00
tree-log.c Btrfs: fix tree logs parallel sync 2009-01-21 12:54:03 -05:00
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: Fixes for 2.6.28-rc API changes 2008-11-19 21:17:22 -05:00
volumes.c Btrfs: simplify iteration codes 2009-01-21 10:59:08 -05:00
volumes.h Btrfs: shared seed device 2008-12-12 10:03:26 -05:00
xattr.c Btrfs: cleanup xattr code 2009-01-21 10:49:16 -05:00
xattr.h Btrfs: optimize btrget/set/removexattr 2008-09-25 11:04:07 -04:00
zlib.c Btrfs: Fix checkpatch.pl warnings 2009-01-05 21:25:51 -05:00