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daf8328172
linux/fs/ext4
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Tahsin Erdogan daf8328172 ext4: eliminate xattr entry e_hash recalculation for removes 
When an extended attribute block is modified, ext4_xattr_hash_entry()
recalculates e_hash for the entry that is pointed by s->here. This  is
unnecessary if the modification is to remove an entry.

Currently, if the removed entry is the last one and there are other
entries remaining, hash calculation targets the just erased entry which
has been filled with zeroes and effectively does nothing.  If the removed
entry is not the last one and there are more entries, this time it will
recalculate hash on the next entry which is totally unnecessary.

Fix these by moving the decision on when to recalculate hash to
ext4_xattr_set_entry().

Signed-off-by: Tahsin Erdogan <tahsin@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2017-06-22 11:52:03 -04:00
..
acl.c ext4: xattr inode deduplication 2017-06-22 11:44:55 -04:00
acl.h ext2/3/4: use generic posix ACL infrastructure 2014-01-25 23:58:19 -05:00
balloc.c The major change this cycle is deleting ext4's copy of the file system 2016-07-26 18:35:55 -07:00
bitmap.c ext4: remove unused header files 2015-04-02 23:47:42 -04:00
block_validity.c ext4: add missing KERN_CONT to a few more debugging uses 2016-10-15 09:57:31 -04:00
dir.c ext4: remove unused variable 2016-09-30 02:14:56 -04:00
ext4_extents.h ext4: fix misspellings in comments. 2016-03-09 23:49:05 -05:00
ext4_jbd2.c ext4: add shutdown bit and check for it 2017-02-05 01:28:48 -05:00
ext4_jbd2.h ext4: improve journal credit handling in set xattr paths 2017-06-21 22:28:40 -04:00
ext4.h ext4: xattr inode deduplication 2017-06-22 11:44:55 -04:00
extents_status.c scripts/spelling.txt: add "comsume(r)" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
extents_status.h ext4: move procfs registration code to fs/ext4/sysfs.c 2015-09-23 12:46:17 -04:00
extents.c ext4: call journal revoke when freeing ea_inode blocks 2017-06-21 21:36:51 -04:00
file.c ext4: fix off-by-one on max nr_pages in ext4_find_unwritten_pgoff() 2017-05-24 18:02:20 -04:00
fsmap.c ext4: support GETFSMAP ioctls 2017-04-30 00:36:53 -04:00
fsmap.h ext4: support GETFSMAP ioctls 2017-04-30 00:36:53 -04:00
fsync.c ext4: add shutdown bit and check for it 2017-02-05 01:28:48 -05:00
hash.c ext4: move halfmd4 into hash.c directly 2017-02-02 11:52:14 -05:00
ialloc.c ext4: do not set posix acls on xattr inodes 2017-06-21 21:21:39 -04:00
indirect.c ext4: call journal revoke when freeing ea_inode blocks 2017-06-21 21:36:51 -04:00
inline.c ext4: xattr-in-inode support 2017-06-21 21:10:32 -04:00
inode.c quota: add get_inode_usage callback to transfer multi-inode charges 2017-06-22 11:46:48 -04:00
ioctl.c quota: add get_inode_usage callback to transfer multi-inode charges 2017-06-22 11:46:48 -04:00
Kconfig dax: fix build warnings with FS_DAX and !FS_IOMAP 2017-01-24 16:26:14 -08:00
Makefile ext4: support GETFSMAP ioctls 2017-04-30 00:36:53 -04:00
mballoc.c ext4: add ext4_is_quota_file() 2017-06-22 11:31:25 -04:00
mballoc.h ext4: support GETFSMAP ioctls 2017-04-30 00:36:53 -04:00
migrate.c ext4: do not set posix acls on xattr inodes 2017-06-21 21:21:39 -04:00
mmp.c block,fs: use REQ_* flags directly 2016-11-01 09:43:26 -06:00
move_extent.c ext4: add ext4_is_quota_file() 2017-06-22 11:31:25 -04:00
namei.c ext4: add largedir feature 2017-06-21 21:09:57 -04:00
page-io.c ext4: replace BUG_ON with WARN_ONCE in ext4_end_bio() 2017-04-30 20:08:05 -04:00
readpage.c Merge branch 'akpm' (patches from Andrew) 2016-07-26 19:55:54 -07:00
resize.c ext4: rename s_resize_flags to s_ext4_flags 2017-02-05 01:27:48 -05:00
super.c quota: add get_inode_usage callback to transfer multi-inode charges 2017-06-22 11:46:48 -04:00
symlink.c ext4: Add statx support 2017-04-03 01:05:58 -04:00
sysfs.c ext4: constify static data that is never modified 2017-04-29 23:47:50 -04:00
truncate.h ext4: fix races between page faults and hole punching 2015-12-07 14:28:03 -05:00
xattr_security.c switch xattr_handler->set() to passing dentry and inode separately 2016-05-27 15:39:43 -04:00
xattr_trusted.c switch xattr_handler->set() to passing dentry and inode separately 2016-05-27 15:39:43 -04:00
xattr_user.c switch xattr_handler->set() to passing dentry and inode separately 2016-05-27 15:39:43 -04:00
xattr.c ext4: eliminate xattr entry e_hash recalculation for removes 2017-06-22 11:52:03 -04:00
xattr.h quota: add get_inode_usage callback to transfer multi-inode charges 2017-06-22 11:46:48 -04:00