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[PATCH] quota: ext3: Improve quota credit estimates

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Use improved credits estimates for quota operations.  Also reserve a space
for a quota operation in a transaction only if filesystem was mounted with
some quota options.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jan Kara
2005-06-23 22:01:04 -07:00
committed by Linus Torvalds
parent 4e5117ba0a
commit 1f54587bea
7 changed files with 60 additions and 36 deletions
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1
include/linux/ext3_fs.h
View File

@@ -358,6 +358,7 @@ struct ext3_inode {
#define EXT3_MOUNT_RESERVATION 0x10000 /* Preallocation */
#define EXT3_MOUNT_BARRIER 0x20000 /* Use block barriers */
#define EXT3_MOUNT_NOBH 0x40000 /* No bufferheads */
#define EXT3_MOUNT_QUOTA 0x80000 /* Some quota option set */
/* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */
#ifndef _LINUX_EXT2_FS_H

19
include/linux/ext3_jbd.h
View File

@@ -42,15 +42,15 @@
* superblock only gets updated once, of course, so don't bother
* counting that again for the quota updates. */
#define EXT3_DATA_TRANS_BLOCKS (EXT3_SINGLEDATA_TRANS_BLOCKS + \
#define EXT3_DATA_TRANS_BLOCKS(sb) (EXT3_SINGLEDATA_TRANS_BLOCKS + \
EXT3_XATTR_TRANS_BLOCKS - 2 + \
2*EXT3_QUOTA_TRANS_BLOCKS)
2*EXT3_QUOTA_TRANS_BLOCKS(sb))
/* Delete operations potentially hit one directory's namespace plus an
* entire inode, plus arbitrary amounts of bitmap/indirection data. Be
* generous. We can grow the delete transaction later if necessary. */
#define EXT3_DELETE_TRANS_BLOCKS (2 * EXT3_DATA_TRANS_BLOCKS + 64)
#define EXT3_DELETE_TRANS_BLOCKS(sb) (2 * EXT3_DATA_TRANS_BLOCKS(sb) + 64)
/* Define an arbitrary limit for the amount of data we will anticipate
* writing to any given transaction. For unbounded transactions such as
@@ -74,14 +74,17 @@
#ifdef CONFIG_QUOTA
/* Amount of blocks needed for quota update - we know that the structure was
* allocated so we need to update only inode+data */
#define EXT3_QUOTA_TRANS_BLOCKS 2
#define EXT3_QUOTA_TRANS_BLOCKS(sb) (test_opt(sb, QUOTA) ? 2 : 0)
/* Amount of blocks needed for quota insert/delete - we do some block writes
* but inode, sb and group updates are done only once */
#define EXT3_QUOTA_INIT_BLOCKS (DQUOT_MAX_WRITES*\
(EXT3_SINGLEDATA_TRANS_BLOCKS-3)+3)
#define EXT3_QUOTA_INIT_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_INIT_ALLOC*\
(EXT3_SINGLEDATA_TRANS_BLOCKS-3)+3+DQUOT_INIT_REWRITE) : 0)
#define EXT3_QUOTA_DEL_BLOCKS(sb) (test_opt(sb, QUOTA) ? (DQUOT_DEL_ALLOC*\
(EXT3_SINGLEDATA_TRANS_BLOCKS-3)+3+DQUOT_DEL_REWRITE) : 0)
#else
#define EXT3_QUOTA_TRANS_BLOCKS 0
#define EXT3_QUOTA_INIT_BLOCKS 0
#define EXT3_QUOTA_TRANS_BLOCKS(sb) 0
#define EXT3_QUOTA_INIT_BLOCKS(sb) 0
#define EXT3_QUOTA_DEL_BLOCKS(sb) 0
#endif
int