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quota: reorder flags in quota state

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Flags in struct quota_state keep flags for each quota type and
some common flags. This patch reorders typed flags:

Before:

0 USRQUOTA DQUOT_USAGE_ENABLED
1 USRQUOTA DQUOT_LIMITS_ENABLED
2 USRQUOTA DQUOT_SUSPENDED
3 GRPQUOTA DQUOT_USAGE_ENABLED
4 GRPQUOTA DQUOT_LIMITS_ENABLED
5 GRPQUOTA DQUOT_SUSPENDED
6          DQUOT_QUOTA_SYS_FILE
7          DQUOT_NEGATIVE_USAGE

After:

0 USRQUOTA DQUOT_USAGE_ENABLED
1 GRPQUOTA DQUOT_USAGE_ENABLED
2 USRQUOTA DQUOT_LIMITS_ENABLED
3 GRPQUOTA DQUOT_LIMITS_ENABLED
4 USRQUOTA DQUOT_SUSPENDED
5 GRPQUOTA DQUOT_SUSPENDED
6          DQUOT_QUOTA_SYS_FILE
7          DQUOT_NEGATIVE_USAGE

Now we can get bitmap of all enabled/suspended quota types without loop.
For example suspended: (flags / DQUOT_SUSPENDED) & ((1 << MAXQUOTAS) - 1).

add/remove: 0/1 grow/shrink: 3/11 up/down: 56/-215 (-159)
function                                     old     new   delta
__dquot_initialize                           423     447     +24
dquot_transfer                               181     197     +16
dquot_alloc_inode                            286     302     +16
dquot_reclaim_space_nodirty                  316     313      -3
dquot_claim_space_nodirty                    314     311      -3
dquot_resume                                 286     281      -5
dquot_free_inode                             332     324      -8
__dquot_alloc_space                          500     492      -8
dquot_disable                               1944    1929     -15
dquot_quota_enable                           252     236     -16
__dquot_free_space                           750     734     -16
dquot_writeback_dquots                       625     608     -17
__dquot_transfer                            1186    1154     -32
dquot_quota_sync                             299     261     -38
dquot_active.isra                             54       -     -54

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Konstantin Khlebnikov
2015-02-12 19:08:16 +03:00
committed by Jan Kara
parent 69a25ee217
commit 781970240a
2 changed files with 27 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
include/linux/quotaops.h
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@@ -134,10 +134,7 @@ static inline bool sb_has_quota_suspended(struct super_block *sb, int type)
static inline unsigned sb_any_quota_suspended(struct super_block *sb)
{
unsigned type, tmsk = 0;
for (type = 0; type < MAXQUOTAS; type++)
tmsk |= sb_has_quota_suspended(sb, type) << type;
return tmsk;
return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_SUSPENDED);
}
/* Does kernel know about any quota information for given sb + type? */
@@ -149,10 +146,7 @@ static inline bool sb_has_quota_loaded(struct super_block *sb, int type)
static inline unsigned sb_any_quota_loaded(struct super_block *sb)
{
unsigned type, tmsk = 0;
for (type = 0; type < MAXQUOTAS; type++)
tmsk |= sb_has_quota_loaded(sb, type) << type;
return tmsk;
return dquot_state_types(sb_dqopt(sb)->flags, DQUOT_USAGE_ENABLED);
}
static inline bool sb_has_quota_active(struct super_block *sb, int type)