From patchwork Mon Aug 24 14:55:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Matthew Wilcox (Oracle)" X-Patchwork-Id: 11733335 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 890531510 for ; Mon, 24 Aug 2020 14:55:30 +0000 (UTC) Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 67A15206B5 for ; Mon, 24 Aug 2020 14:55:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="Cd1si9Xp" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 67A15206B5 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvdimm-bounces@lists.01.org Received: from ml01.vlan13.01.org (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 354A41359E201; Mon, 24 Aug 2020 07:55:25 -0700 (PDT) Received-SPF: None (mailfrom) identity=mailfrom; client-ip=90.155.50.34; helo=casper.infradead.org; envelope-from=willy@infradead.org; receiver= Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 90B1A13596B73 for ; Mon, 24 Aug 2020 07:55:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=PHm5fMNB8ZZgdRcktW4dLlLzoT8t70NROW9gjEwt3r8=; b=Cd1si9Xppq69WitlxSU+3lK401 x5ocJ20OiXVPCUyr47XVUJE05GvIRgSpXShDd7Dx3dhVbkLPYWb+vXiJnWuR9JFvipXP+tVskYrtx /AqUQwtxGaRbYBcS25tanxCTzqyBrvEl3SAm2qCEAiY/xohFdRgrHUESaKlTdy1jvoqQkEMb+hinH SfbsHzJzKFEVeIdhw1HgGEKAe5YC+zFWGwnsjs3Pymeb/HgdSMbY068p1bX+a/HRJGB8yS4tDksJ3 OOOIaOnZPhoxc83JrfwKcoPVnkVI0pLbgwmjlecZTt4donrJQUj5hzr+ROleN6OWLObS/xuJqzoWG SFHtlkDA==; Received: from willy by casper.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kADsR-0002mX-4j; Mon, 24 Aug 2020 14:55:15 +0000 From: "Matthew Wilcox (Oracle)" To: linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH 7/9] iomap: Convert write_count to byte count Date: Mon, 24 Aug 2020 15:55:08 +0100 Message-Id: <20200824145511.10500-8-willy@infradead.org> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20200824145511.10500-1-willy@infradead.org> References: <20200824145511.10500-1-willy@infradead.org> MIME-Version: 1.0 Message-ID-Hash: KJ2TJ32B2NRLMLF43W4XDMCEVYZZ255U X-Message-ID-Hash: KJ2TJ32B2NRLMLF43W4XDMCEVYZZ255U X-MailFrom: willy@infradead.org X-Mailman-Rule-Hits: nonmember-moderation X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation CC: "Matthew Wilcox (Oracle)" , "Darrick J . Wong" , linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org X-Mailman-Version: 3.1.1 Precedence: list List-Id: "Linux-nvdimm developer list." Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: Instead of counting bio segments, count the number of bytes submitted. This insulates us from the block layer's definition of what a 'same page' is, which is not necessarily clear once THPs are involved. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig --- fs/iomap/buffered-io.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index c9b44f86d166..8c6187a6f34e 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -1050,7 +1050,7 @@ EXPORT_SYMBOL_GPL(iomap_page_mkwrite); static void iomap_finish_page_writeback(struct inode *inode, struct page *page, - int error) + int error, unsigned int len) { struct iomap_page *iop = to_iomap_page(page); @@ -1062,7 +1062,7 @@ iomap_finish_page_writeback(struct inode *inode, struct page *page, WARN_ON_ONCE(i_blocks_per_page(inode, page) > 1 && !iop); WARN_ON_ONCE(iop && atomic_read(&iop->write_count) <= 0); - if (!iop || atomic_dec_and_test(&iop->write_count)) + if (!iop || atomic_sub_and_test(len, &iop->write_count)) end_page_writeback(page); } @@ -1096,7 +1096,8 @@ iomap_finish_ioend(struct iomap_ioend *ioend, int error) /* walk each page on bio, ending page IO on them */ bio_for_each_segment_all(bv, bio, iter_all) - iomap_finish_page_writeback(inode, bv->bv_page, error); + iomap_finish_page_writeback(inode, bv->bv_page, error, + bv->bv_len); bio_put(bio); } /* The ioend has been freed by bio_put() */ @@ -1312,8 +1313,8 @@ iomap_add_to_ioend(struct inode *inode, loff_t offset, struct page *page, merged = __bio_try_merge_page(wpc->ioend->io_bio, page, len, poff, &same_page); - if (iop && !same_page) - atomic_inc(&iop->write_count); + if (iop) + atomic_add(len, &iop->write_count); if (!merged) { if (bio_full(wpc->ioend->io_bio, len)) {