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| author | Joe Thornber | 2014-10-06 16:28:30 +0200 |
|---|---|---|
| committer | Mike Snitzer | 2014-11-10 21:25:27 +0100 |
| commit | 8a01a6af75f839ff8eb25dab69b49224e855bfa1 (patch) | |
| tree | 6e0c31ce682332cd8af5d6f77037b56421507542 /drivers/md/dm-thin-metadata.h | |
| parent | dm transaction manager: add support for prefetching blocks of metadata (diff) | |
| download | kernel-qcow2-linux-8a01a6af75f839ff8eb25dab69b49224e855bfa1.tar.gz kernel-qcow2-linux-8a01a6af75f839ff8eb25dab69b49224e855bfa1.tar.xz kernel-qcow2-linux-8a01a6af75f839ff8eb25dab69b49224e855bfa1.zip | |
dm thin: prefetch missing metadata pages
Prefetch metadata at the start of the worker thread and then again every
128th bio processed from the deferred list.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-thin-metadata.h')
| -rw-r--r-- | drivers/md/dm-thin-metadata.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/md/dm-thin-metadata.h b/drivers/md/dm-thin-metadata.h index efedd5a4cd8f..921d15ee56a0 100644 --- a/drivers/md/dm-thin-metadata.h +++ b/drivers/md/dm-thin-metadata.h @@ -213,6 +213,11 @@ int dm_pool_register_metadata_threshold(struct dm_pool_metadata *pmd, int dm_pool_metadata_set_needs_check(struct dm_pool_metadata *pmd); bool dm_pool_metadata_needs_check(struct dm_pool_metadata *pmd); +/* + * Issue any prefetches that may be useful. + */ +void dm_pool_issue_prefetches(struct dm_pool_metadata *pmd); + /*----------------------------------------------------------------*/ #endif |