Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752411Ab1EDIVl (ORCPT ); Wed, 4 May 2011 04:21:41 -0400 Received: from mga01.intel.com ([192.55.52.88]:28701 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752398Ab1EDIVf (ORCPT ); Wed, 4 May 2011 04:21:35 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.64,313,1301900400"; d="scan'208";a="917770627" Message-Id: <20110504082115.093981766@sli10-conroe.sh.intel.com> User-Agent: quilt/0.48-1 Date: Wed, 04 May 2011 16:17:26 +0800 From: shaohua.li@intel.com To: linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org Cc: jaxboe@fusionio.com, htejun@gmail.com, jgarzik@pobox.com, hch@infradead.org, djwong@us.ibm.com, Shaohua Li Subject: [patch v2 1/3] block: add a non-queueable flush flag References: <20110504081725.946950281@sli10-conroe.sh.intel.com> Content-Disposition: inline; filename=blk-nonqueueable-flush-flag.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1479 Lines: 44 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. Signed-off-by: Shaohua Li --- include/linux/blkdev.h | 11 +++++++++++ 1 file changed, 11 insertions(+) Index: linux/include/linux/blkdev.h =================================================================== --- linux.orig/include/linux/blkdev.h 2011-05-04 14:23:42.000000000 +0800 +++ linux/include/linux/blkdev.h 2011-05-04 14:24:40.000000000 +0800 @@ -364,6 +364,7 @@ struct request_queue * for flush operations */ unsigned int flush_flags; + unsigned int flush_not_queueable:1; unsigned int flush_pending_idx:1; unsigned int flush_running_idx:1; unsigned long flush_pending_since; @@ -549,6 +550,16 @@ static inline void blk_clear_queue_full( queue_flag_clear(QUEUE_FLAG_ASYNCFULL, q); } +static inline void blk_set_queue_flush_queueable(struct request_queue *q, + bool queueable) +{ + q->flush_not_queueable = !queueable; +} + +static inline bool blk_queue_flush_queueable(struct request_queue *q) +{ + return !q->flush_not_queueable; +} /* * mergeable request must not have _NOMERGE or _BARRIER bit set, nor may -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/