From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 52642C43600 for ; Mon, 5 Apr 2021 16:05:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2C4C1613FF for ; Mon, 5 Apr 2021 16:05:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238598AbhDEQFs (ORCPT ); Mon, 5 Apr 2021 12:05:48 -0400 Received: from mail.kernel.org ([198.145.29.99]:58102 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238653AbhDEQFU (ORCPT ); Mon, 5 Apr 2021 12:05:20 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id B798C613E1; Mon, 5 Apr 2021 16:05:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1617638714; bh=S+LoKKB/P34fdLHzMLjqD/VG/Ol7NcL66qYaVLSZE38=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WfnUMFn5qCVbj2uF/vvBxBKW8awTDhUdUx0X+DzEVwMdBBIhF+z2hqQ8xOF+L/Xmd 4pBG4YLdqkVdlE4WbvSeKgmls4UHYEtduHLpHMbGFYZPFSUQjRAhww1yQQwfc79bcv NDksTnamk3FjzypsoRkPRt3vusU3nhagZrT1UCWp54WAP/bPrUpLmAb2NkMKe7kT8J nqJyHV+Swwl3gC5N8PJCEuC8SpPzDDrxIi25N+CQ9qf7lE65XIEKH/6gVQKirBHvIc YRKrLdbdCwE5rT57gDfuYU64zCtQDP8Khe2QIuQRptZXwnbS263d9BDFniGuM+E4ap CB4DI1eczQzmw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Pavel Begunkov , Jens Axboe , Sasha Levin , linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 13/13] block: don't ignore REQ_NOWAIT for direct IO Date: Mon, 5 Apr 2021 12:04:58 -0400 Message-Id: <20210405160459.268794-13-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210405160459.268794-1-sashal@kernel.org> References: <20210405160459.268794-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org From: Pavel Begunkov [ Upstream commit f8b78caf21d5bc3fcfc40c18898f9d52ed1451a5 ] If IOCB_NOWAIT is set on submission, then that needs to get propagated to REQ_NOWAIT on the block side. Otherwise we completely lose this information, and any issuer of IOCB_NOWAIT IO will potentially end up blocking on eg request allocation on the storage side. Signed-off-by: Pavel Begunkov Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- fs/block_dev.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/block_dev.c b/fs/block_dev.c index 79272cdbe827..bd93563477a4 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -246,6 +246,8 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter, bio.bi_opf = dio_bio_write_op(iocb); task_io_account_write(ret); } + if (iocb->ki_flags & IOCB_NOWAIT) + bio.bi_opf |= REQ_NOWAIT; if (iocb->ki_flags & IOCB_HIPRI) bio_set_polled(&bio, iocb); @@ -399,6 +401,8 @@ __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, int nr_pages) bio->bi_opf = dio_bio_write_op(iocb); task_io_account_write(bio->bi_iter.bi_size); } + if (iocb->ki_flags & IOCB_NOWAIT) + bio->bi_opf |= REQ_NOWAIT; dio->size += bio->bi_iter.bi_size; pos += bio->bi_iter.bi_size; -- 2.30.2