Joel Becker e798b3f8a9 ocfs2: Don't hand-code xor in ocfs2_hamming_encode(). ...

When I wrote ocfs2_hamming_encode(), I was following documentation of
the algorithm and didn't have quite the (possibly still imperfect) grasp
of it I do now.  As part of this, I literally hand-coded xor.  I would
test a bit, and then add that bit via xor to the parity word.

I can, of course, just do a single xor of the parity word and the source
word (the code buffer bit offset).  This cuts CPU usage by 53% on a
mostly populated buffer (an inode containing utmp.h inline).

Joel

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>

2009-01-05 08:40:34 -08:00

..

cluster

ocfs2/quota: Add QUOTA in mlog_attribute.

2009-01-05 08:40:30 -08:00

dlm

Merge branch 'master' into next

2008-12-04 17:16:36 +11:00

acl.c

ocfs2: add ocfs2_init_acl in mknod

2009-01-05 08:34:20 -08:00

acl.h

ocfs2: add ocfs2_init_acl in mknod

2009-01-05 08:34:20 -08:00

alloc.c

ocfs2: Create ocfs2_xattr_value_buf.

2009-01-05 08:40:32 -08:00

alloc.h

ocfs2: Create ocfs2_xattr_value_buf.

2009-01-05 08:40:32 -08:00

aops.c

ocfs2: Use metadata-specific ocfs2_journal_access_*() functions.

2009-01-05 08:40:32 -08:00

aops.h

ocfs2: convert to new aops

2007-10-16 09:42:58 -07:00

blockcheck.c

ocfs2: Don't hand-code xor in ocfs2_hamming_encode().

2009-01-05 08:40:34 -08:00

blockcheck.h

ocfs2: Add the underlying blockcheck code.

2009-01-05 08:40:31 -08:00

buffer_head_io.c

ocfs2: Use BH_JBDPrivateStart instead of BH_Unshadow

2009-01-05 08:40:24 -08:00

buffer_head_io.h

ocfs2: Validate metadata only when it's read from disk.

2009-01-05 08:36:53 -08:00

dcache.c

ocfs2: Remove mount/unmount votes

2008-01-25 14:45:34 -08:00

dcache.h

ocfs2: Remove special casing for inode creation in ocfs2_dentry_attach_lock()

2006-09-24 13:50:45 -07:00

dir.c

ocfs2: Checksum and ECC for directory blocks.

2009-01-05 08:40:34 -08:00

dir.h

ocfs2: Checksum and ECC for directory blocks.

2009-01-05 08:40:34 -08:00

dlmglue.c

ocfs2: Fix ocfs2_read_quota_block() error handling.

2009-01-05 08:40:24 -08:00

dlmglue.h

ocfs2: Implementation of local and global quota file handling

2009-01-05 08:40:23 -08:00

export.c

[PATCH] switch all filesystems over to d_obtain_alias

2008-10-23 05:13:01 -04:00

export.h

exportfs: make struct export_operations const

2007-10-22 08:13:21 -07:00

extent_map.c

ocfs2: Wrap virtual block reads in ocfs2_read_virt_blocks()

2009-01-05 08:36:54 -08:00

extent_map.h

ocfs2: Wrap virtual block reads in ocfs2_read_virt_blocks()

2009-01-05 08:36:54 -08:00

file.c

ocfs2: Use metadata-specific ocfs2_journal_access_*() functions.

2009-01-05 08:40:32 -08:00

file.h

ocfs2: Implementation of local and global quota file handling

2009-01-05 08:40:23 -08:00

heartbeat.c

ocfs2: Move o2hb functionality into the stack glue.

2008-04-18 08:56:04 -07:00

heartbeat.h

ocfs2: Move o2hb functionality into the stack glue.

2008-04-18 08:56:04 -07:00

inode.c

ocfs2: Use metadata-specific ocfs2_journal_access_*() functions.

2009-01-05 08:40:32 -08:00

inode.h

ocfs2: Implementation of local and global quota file handling

2009-01-05 08:40:23 -08:00

ioctl.c

ocfs2: Don't check for NULL before brelse()

2008-10-13 17:02:44 -07:00

ioctl.h

ocfs2: Convert ocfs2 over to unlocked_ioctl

2008-04-18 08:56:11 -07:00

journal.c

ocfs2: Checksum and ECC for directory blocks.

2009-01-05 08:40:34 -08:00

journal.h

ocfs2: Use metadata-specific ocfs2_journal_access_*() functions.

2009-01-05 08:40:32 -08:00

localalloc.c

ocfs2: Use metadata-specific ocfs2_journal_access_*() functions.

2009-01-05 08:40:32 -08:00

localalloc.h

ocfs2: throttle back local alloc when low on disk space

2008-10-13 13:57:57 -07:00

locks.c

ocfs2: POSIX file locks support

2008-10-13 13:57:57 -07:00

locks.h

ocfs2: POSIX file locks support

2008-10-13 13:57:57 -07:00

Makefile

ocfs2: Add the underlying blockcheck code.

2009-01-05 08:40:31 -08:00

mmap.c

ocfs2: return 0 in page_mkwrite to let VFS retry.

2008-11-10 09:51:47 -08:00

mmap.h

[PATCH] OCFS2: The Second Oracle Cluster Filesystem

2006-01-03 11:45:47 -08:00

namei.c

ocfs2: Use metadata-specific ocfs2_journal_access_*() functions.

2009-01-05 08:40:32 -08:00

namei.h

ocfs2: Move directory manipulation code into dir.c

2007-10-12 11:54:36 -07:00

ocfs1_fs_compat.h

fs/: Spelling fixes

2008-02-03 17:33:42 +02:00

ocfs2_fs.h

ocfs2: Enable metadata checksums.

2009-01-05 08:40:34 -08:00

ocfs2_lockid.h

ocfs2: Implementation of local and global quota file handling

2009-01-05 08:40:23 -08:00

ocfs2_lockingver.h

ocfs2: Negotiate locking protocol versions.

2008-02-06 16:11:29 -08:00

ocfs2.h

ocfs2: Add directory block trailers.

2009-01-05 08:40:34 -08:00

quota_global.c

ocfs2: Use metadata-specific ocfs2_journal_access_*() functions.

2009-01-05 08:40:32 -08:00

quota_local.c

ocfs2: Use metadata-specific ocfs2_journal_access_*() functions.

2009-01-05 08:40:32 -08:00

quota.h

ocfs2: Fix ocfs2_read_quota_block() error handling.

2009-01-05 08:40:24 -08:00

resize.c

ocfs2: Use metadata-specific ocfs2_journal_access_*() functions.

2009-01-05 08:40:32 -08:00

resize.h

[PATCH 2/2] ocfs2: Implement group add for online resize

2008-01-25 15:04:24 -08:00

slot_map.c

ocfs2: Validate metadata only when it's read from disk.

2009-01-05 08:36:53 -08:00

slot_map.h

ocfs2: De-magic the in-memory slot map.

2008-04-18 08:56:03 -07:00

stack_o2cb.c

ocfs2: Remove ->hangup() from stack glue operations.

2008-06-16 10:46:52 -07:00

stack_user.c

ocfs2: initialize stack_user lvbptr

2008-12-01 14:46:39 -08:00

stackglue.c

ocfs2: Remove pointless !!

2008-10-13 17:02:44 -07:00

stackglue.h

ocfs2: POSIX file locks support

2008-10-13 13:57:57 -07:00

suballoc.c

ocfs2: Use metadata-specific ocfs2_journal_access_*() functions.

2009-01-05 08:40:32 -08:00

suballoc.h

ocfs2: Validate metadata only when it's read from disk.

2009-01-05 08:36:53 -08:00

super.c

ocfs2: Validate superblock with checksum and ecc.

2009-01-05 08:40:34 -08:00

super.h

ocfs2: use s_maxbytes directly in ocfs2_change_file_space()

2007-08-09 17:25:07 -07:00

symlink.c

ocfs2: Wrap inode block reads in a dedicated function.

2009-01-05 08:36:52 -08:00

symlink.h

[PATCH] mark struct inode_operations const 2

2007-02-12 09:48:46 -08:00

sysfile.c

ocfs2: Silence false lockdep warnings

2008-01-25 15:05:44 -08:00

sysfile.h

[PATCH] OCFS2: The Second Oracle Cluster Filesystem

2006-01-03 11:45:47 -08:00

uptodate.c

ocfs2: use smaller counters in ocfs2_remove_xattr_clusters_from_cache

2008-10-13 17:02:44 -07:00

uptodate.h

ocfs2: Add helper function in uptodate.c for removing xattr clusters

2008-10-13 13:57:59 -07:00

ver.c

ocfs2: bump version number

2008-01-25 15:05:46 -08:00

ver.h

[PATCH] OCFS2: The Second Oracle Cluster Filesystem

2006-01-03 11:45:47 -08:00

xattr.c

ocfs2: Use proper journal_access function in xattr.c

2009-01-05 08:40:34 -08:00

xattr.h

ocfs2: Create ocfs2_xattr_value_buf.

2009-01-05 08:40:32 -08:00