Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161860AbbKFRVF (ORCPT ); Fri, 6 Nov 2015 12:21:05 -0500 Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:54559 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161695AbbKFRVB (ORCPT ); Fri, 6 Nov 2015 12:21:01 -0500 From: Jens Axboe To: , CC: , , Jens Axboe Subject: [PATCH 5/5] directio: add block polling support Date: Fri, 6 Nov 2015 10:20:23 -0700 Message-ID: <1446830423-25027-6-git-send-email-axboe@fb.com> X-Mailer: git-send-email 2.4.1.168.g1ea28e1 In-Reply-To: <1446830423-25027-1-git-send-email-axboe@fb.com> References: <1446830423-25027-1-git-send-email-axboe@fb.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [192.168.54.13] X-Proofpoint-Spam-Reason: safe X-FB-Internal: Safe X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2015-11-06_11:,, signatures=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1900 Lines: 58 This adds support for sync O_DIRECT read/write poll support. Signed-off-by: Jens Axboe [hch: split from a larger patch, minor updates] Signed-off-by: Christoph Hellwig --- fs/direct-io.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/fs/direct-io.c b/fs/direct-io.c index 3ae0e0427191..7025029c666f 100644 --- a/fs/direct-io.c +++ b/fs/direct-io.c @@ -109,6 +109,8 @@ struct dio_submit { struct dio { int flags; /* doesn't change */ int rw; + blk_qc_t bio_cookie; + struct block_device *bio_bdev; struct inode *inode; loff_t i_size; /* i_size when submitted */ dio_iodone_t *end_io; /* IO completion function */ @@ -397,11 +399,14 @@ static inline void dio_bio_submit(struct dio *dio, struct dio_submit *sdio) if (dio->is_async && dio->rw == READ && dio->should_dirty) bio_set_pages_dirty(bio); - if (sdio->submit_io) + if (sdio->submit_io) { sdio->submit_io(dio->rw, bio, dio->inode, sdio->logical_offset_in_bio); - else - submit_bio(dio->rw, bio); + dio->bio_cookie = BLK_QC_T_NONE; + } else { + dio->bio_cookie = submit_bio(dio->rw, bio); + dio->bio_bdev = bio->bi_bdev; + } sdio->bio = NULL; sdio->boundary = 0; @@ -440,7 +445,8 @@ static struct bio *dio_await_one(struct dio *dio) __set_current_state(TASK_UNINTERRUPTIBLE); dio->waiter = current; spin_unlock_irqrestore(&dio->bio_lock, flags); - io_schedule(); + if (!blk_poll(bdev_get_queue(dio->bio_bdev), dio->bio_cookie)) + io_schedule(); /* wake up sets us TASK_RUNNING */ spin_lock_irqsave(&dio->bio_lock, flags); dio->waiter = NULL; -- 2.4.1.168.g1ea28e1 -- 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/