AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-04 02:06:43 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

ext4: improve credit estimate for EXT4_SINGLEDATA_TRANS_BLOCKS

Browse Source 
Estimate of 27 credits for allocation of a block in extent based inode
is unnecessarily high. We can easily argue 20 is enough.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Jan Kara 2013-04-09 12:39:26 -04:00 committed by Theodore Ts'o
parent eabe0444df
commit f45a5ef91b
1 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
fs/ext4/ext4_jbd2.h
View File

@ -29,11 +29,13 @@
* block to complete the transaction.
*
* For extents-enabled fs we may have to allocate and modify up to
* 5 levels of tree + root which are stored in the inode. */
* 5 levels of tree, data block (for each of these we need bitmap + group
* summaries), root which is stored in the inode, sb
*/
#define EXT4_SINGLEDATA_TRANS_BLOCKS(sb) \
(EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS) \
? 27U : 8U)
? 20U : 8U)
/* Extended attribute operations touch at most two data buffers,
* two bitmap buffers, and two group summaries, in addition to the inode