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md/raid5: Change or of some order to improve efficiency. 

As the function call is the most expensive of these tests it should be
done later in the chain so that it can be avoided in some cases.

Signed-off-by: Jianpeng Ma <majianpeng@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
hifive-unleashed-5.1
majianpeng 2013-04-24 11:42:41 +10:00 committed by NeilBrown
parent 3f810b6c4a
commit 6f608040ce
1 changed files with 4 additions and 3 deletions
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7
drivers/md/raid5.c
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@ -4672,9 +4672,10 @@ static inline sector_t sync_request(struct mddev *mddev, sector_t sector_nr, int
*skipped = 1;
return rv;
}
if (!bitmap_start_sync(mddev->bitmap, sector_nr, &sync_blocks, 1) &&
!test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery) &&
!conf->fullsync && sync_blocks >= STRIPE_SECTORS) {
if (!test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery) &&
!conf->fullsync &&
!bitmap_start_sync(mddev->bitmap, sector_nr, &sync_blocks, 1) &&
sync_blocks >= STRIPE_SECTORS) {
/* we can skip this block, and probably more */
sync_blocks /= STRIPE_SECTORS;
*skipped = 1;