diff options
| author | shaohua.li@intel.com <shaohua.li@intel.com> | 2011-05-06 11:34:32 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-06-03 09:31:41 +0900 |
| commit | 81b5f4969a360c24882a44e91e6177d2d79f933f (patch) | |
| tree | 6c198dd5e8421a6a2864211bb0fd2995bdc5bc4f /block | |
| parent | bd1a4347d6d4157cdd9424a85979e3ee2e9533a3 (diff) | |
block: add a non-queueable flush flag
commit f3876930952390a31c3a7fd68dd621464a36eb80 upstream.
flush request isn't queueable in some drives. Add a flag to let driver
notify block layer about this. We can optimize flush performance with the
knowledge.
Stable: 2.6.39 only
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-settings.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/block/blk-settings.c b/block/blk-settings.c index 1fa769293597..cd3c428e194f 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -790,6 +790,12 @@ void blk_queue_flush(struct request_queue *q, unsigned int flush) } EXPORT_SYMBOL_GPL(blk_queue_flush); +void blk_queue_flush_queueable(struct request_queue *q, bool queueable) +{ + q->flush_not_queueable = !queueable; +} +EXPORT_SYMBOL_GPL(blk_queue_flush_queueable); + static int __init blk_settings_init(void) { blk_max_low_pfn = max_low_pfn - 1; |