From patchwork Mon Jul 12 03:06:29 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 12370023 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 6B1C1C07E99 for ; Mon, 12 Jul 2021 04:02:46 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 12F9B60FF3 for ; Mon, 12 Jul 2021 04:02:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 12F9B60FF3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 341B26B009F; Mon, 12 Jul 2021 00:02:46 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 2F0B66B00A0; Mon, 12 Jul 2021 00:02:46 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 16B8D6B00A1; Mon, 12 Jul 2021 00:02:46 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0071.hostedemail.com [216.40.44.71]) by kanga.kvack.org (Postfix) with ESMTP id E82F76B009F for ; Mon, 12 Jul 2021 00:02:45 -0400 (EDT) Received: from smtpin22.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 1261B1CB0A for ; Mon, 12 Jul 2021 04:02:45 +0000 (UTC) X-FDA: 78352589490.22.20FD596 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf21.hostedemail.com (Postfix) with ESMTP id CB303D004394 for ; Mon, 12 Jul 2021 04:02:44 +0000 (UTC) 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=SK8yOeE/lbjT6+xJu7l9snuSsax4aIwbWKZSevIDweo=; b=HiBVX/K/Q+nuyifSksFrhZoQSz dfy3g3QMogXAICAXeDV+HQBzPJURNLfaTEbuS2M34uDxQu8THDx+S/mvTsXtTGAMNxHK9eN62M5qa nPX1uCwAQ/syjaLtB2IMdEh5PiaQeltzo48Vo/kP1+gTBkN2j3CgUE6BX0TuWrrsrVxzVDNyEnXur JKls9YjSXolAJCQ/UUpP9zoKjRBeIGa1rONJi5T5egRKDctiMAJBSChwk470585BQFSnmv9yO6ouX a0MC6drw7KjQOJ9+VuRU/mLBhmrsTOPT6NItk7/ifJ4SwLTHHUM3zghk/mHBKLQoLB5xgMVOQ8q7q E9fKFsXg==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1m2n8a-00Gqcz-SG; Mon, 12 Jul 2021 04:01:50 +0000 From: "Matthew Wilcox (Oracle)" To: linux-kernel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org Subject: [PATCH v13 105/137] iomap: Convert iomap_do_writepage to use a folio Date: Mon, 12 Jul 2021 04:06:29 +0100 Message-Id: <20210712030701.4000097-106-willy@infradead.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210712030701.4000097-1-willy@infradead.org> References: <20210712030701.4000097-1-willy@infradead.org> MIME-Version: 1.0 X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: CB303D004394 X-Stat-Signature: hm8fuozk7n3of8hdqwkpjcej7qp793ix Authentication-Results: imf21.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b="HiBVX/K/"; spf=none (imf21.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org; dmarc=none X-HE-Tag: 1626062564-589450 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Writeback an entire folio at a time, and adjust some of the variables to have more familiar names. Signed-off-by: Matthew Wilcox (Oracle) --- fs/iomap/buffered-io.c | 49 +++++++++++++++++++----------------------- 1 file changed, 22 insertions(+), 27 deletions(-) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 5b6a3e675101..c2736f36db76 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -1296,9 +1296,8 @@ iomap_add_to_ioend(struct inode *inode, loff_t pos, struct folio *folio, static int iomap_writepage_map(struct iomap_writepage_ctx *wpc, struct writeback_control *wbc, struct inode *inode, - struct page *page, u64 end_offset) + struct folio *folio, loff_t end_pos) { - struct folio *folio = page_folio(page); struct iomap_page *iop = to_iomap_page(folio); struct iomap_ioend *ioend, *next; unsigned len = i_blocksize(inode); @@ -1316,7 +1315,7 @@ iomap_writepage_map(struct iomap_writepage_ctx *wpc, * invalid, grab a new one. */ for (i = 0; i < nblocks; i++, pos += len) { - if (pos >= end_offset) + if (pos >= end_pos) break; if (iop && !test_bit(i, iop->uptodate)) continue; @@ -1398,16 +1397,15 @@ iomap_writepage_map(struct iomap_writepage_ctx *wpc, static int iomap_do_writepage(struct page *page, struct writeback_control *wbc, void *data) { + struct folio *folio = page_folio(page); struct iomap_writepage_ctx *wpc = data; - struct inode *inode = page->mapping->host; - pgoff_t end_index; - u64 end_offset; - loff_t offset; + struct inode *inode = folio->mapping->host; + loff_t end_pos, isize; - trace_iomap_writepage(inode, page_offset(page), PAGE_SIZE); + trace_iomap_writepage(inode, folio_pos(folio), folio_size(folio)); /* - * Refuse to write the page out if we are called from reclaim context. + * Refuse to write the folio out if we are called from reclaim context. * * This avoids stack overflows when called from deeply used stacks in * random callers for direct reclaim or memcg reclaim. We explicitly @@ -1421,10 +1419,10 @@ iomap_do_writepage(struct page *page, struct writeback_control *wbc, void *data) goto redirty; /* - * Is this page beyond the end of the file? + * Is this folio beyond the end of the file? * - * The page index is less than the end_index, adjust the end_offset - * to the highest offset that this page should represent. + * The folio index is less than the end_index, adjust the end_pos + * to the highest offset that this folio should represent. * ----------------------------------------------------- * | file mapping | | * ----------------------------------------------------- @@ -1433,11 +1431,9 @@ iomap_do_writepage(struct page *page, struct writeback_control *wbc, void *data) * | desired writeback range | see else | * ---------------------------------^------------------| */ - offset = i_size_read(inode); - end_index = offset >> PAGE_SHIFT; - if (page->index < end_index) - end_offset = (loff_t)(page->index + 1) << PAGE_SHIFT; - else { + isize = i_size_read(inode); + end_pos = folio_pos(folio) + folio_size(folio); + if (end_pos - 1 >= isize) { /* * Check whether the page to write out is beyond or straddles * i_size or not. @@ -1449,7 +1445,8 @@ iomap_do_writepage(struct page *page, struct writeback_control *wbc, void *data) * | | Straddles | * ---------------------------------^-----------|--------| */ - unsigned offset_into_page = offset & (PAGE_SIZE - 1); + size_t poff = offset_in_folio(folio, isize); + pgoff_t end_index = isize >> PAGE_SHIFT; /* * Skip the page if it is fully outside i_size, e.g. due to a @@ -1468,8 +1465,8 @@ iomap_do_writepage(struct page *page, struct writeback_control *wbc, void *data) * if the page to write is totally beyond the i_size or if it's * offset is just equal to the EOF. */ - if (page->index > end_index || - (page->index == end_index && offset_into_page == 0)) + if (folio->index > end_index || + (folio->index == end_index && poff == 0)) goto redirty; /* @@ -1480,17 +1477,15 @@ iomap_do_writepage(struct page *page, struct writeback_control *wbc, void *data) * memory is zeroed when mapped, and writes to that region are * not written out to the file." */ - zero_user_segment(page, offset_into_page, PAGE_SIZE); - - /* Adjust the end_offset to the end of file */ - end_offset = offset; + zero_user_segment(&folio->page, poff, folio_size(folio)); + end_pos = isize; } - return iomap_writepage_map(wpc, wbc, inode, page, end_offset); + return iomap_writepage_map(wpc, wbc, inode, folio, end_pos); redirty: - redirty_page_for_writepage(wbc, page); - unlock_page(page); + folio_redirty_for_writepage(wbc, folio); + folio_unlock(folio); return 0; }