From patchwork Fri Mar 5 04:18:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 12117551 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 A7DC3C433E0 for ; Fri, 5 Mar 2021 04:24:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 73BCE6500C for ; Fri, 5 Mar 2021 04:24:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229589AbhCEEYj (ORCPT ); Thu, 4 Mar 2021 23:24:39 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45900 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229478AbhCEEYi (ORCPT ); Thu, 4 Mar 2021 23:24:38 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 53F51C061574; Thu, 4 Mar 2021 20:24:38 -0800 (PST) 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=9d+mCHMlGcGG93YO8zcxGxoaCO1Ob3kebJ3Y/BX0vCc=; b=IIGNZaLDlocbNOcWiZR2oI2902 +OZ55+HOrai+yAVmwk2XoY0yL7yta2iyZ+Ght67SpbXgE0OOlM3MG4a8hKR44x7Aj97+TbU6WHlmv /RS66N1HAb7AeRvuNdDeE51EoM5X5wT9+FVl5dR503b5bZGc+r4a/qFKy9zranoD/wQckeVdiy72x aE4+2X/hyFqfyLcraQVDNYhP0Y/3btPMiP95E5/GDNnmWMjAvkCfrIT1eEXIPdk4LM9cReJ2PYedB Fh7ramj855Ib1FaLyAuLzqXJpvsBRoFHwXVfS7bVKMgNNk267WoOqfs311kLb+Q5o0hq5FCvNXFh0 CktHqZ/g==; Received: from willy by casper.infradead.org with local (Exim 4.94 #2 (Red Hat Linux)) id 1lI204-00A3oB-Sv; Fri, 05 Mar 2021 04:23:45 +0000 From: "Matthew Wilcox (Oracle)" To: linux-mm@kvack.org Cc: "Matthew Wilcox (Oracle)" , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH v4 15/25] mm/filemap: Convert lock_page_async to lock_folio_async Date: Fri, 5 Mar 2021 04:18:51 +0000 Message-Id: <20210305041901.2396498-16-willy@infradead.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210305041901.2396498-1-willy@infradead.org> References: <20210305041901.2396498-1-willy@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org There aren't any actual callers of lock_page_async(), but convert filemap_update_page() to call __lock_folio_async(). __lock_folio_async() is 21 bytes smaller than __lock_page_async(), but the real savings come from using a folio in filemap_update_page(), shrinking it from 514 bytes to 403 bytes, saving 111 bytes. The text shrinks by 132 bytes in total. Signed-off-by: Matthew Wilcox (Oracle) --- fs/io_uring.c | 2 +- include/linux/pagemap.h | 14 +++++++------- mm/filemap.c | 31 ++++++++++++++++--------------- 3 files changed, 24 insertions(+), 23 deletions(-) diff --git a/fs/io_uring.c b/fs/io_uring.c index 4a088581b0f2..55687707b5fb 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -3155,7 +3155,7 @@ static int io_read_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe) } /* - * This is our waitqueue callback handler, registered through lock_page_async() + * This is our waitqueue callback handler, registered through lock_folio_async() * when we initially tried to do the IO with the iocb armed our waitqueue. * This gets called when the page is unlocked, and we generally expect that to * happen when the page IO is completed and the page is now uptodate. This will diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 0fa1a0338e54..9dbd9cf7d541 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -637,7 +637,7 @@ static inline bool wake_page_match(struct wait_page_queue *wait_page, void __lock_folio(struct folio *folio); int __lock_folio_killable(struct folio *folio); -extern int __lock_page_async(struct page *page, struct wait_page_queue *wait); +int __lock_folio_async(struct folio *folio, struct wait_page_queue *wait); extern int __lock_page_or_retry(struct page *page, struct mm_struct *mm, unsigned int flags); void unlock_page(struct page *page); @@ -695,18 +695,18 @@ static inline int lock_page_killable(struct page *page) } /* - * lock_page_async - Lock the page, unless this would block. If the page - * is already locked, then queue a callback when the page becomes unlocked. + * lock_folio_async - Lock the folio, unless this would block. If the folio + * is already locked, then queue a callback when the folio becomes unlocked. * This callback can then retry the operation. * - * Returns 0 if the page is locked successfully, or -EIOCBQUEUED if the page + * Returns 0 if the folio is locked successfully, or -EIOCBQUEUED if the folio * was already locked and the callback defined in 'wait' was queued. */ -static inline int lock_page_async(struct page *page, +static inline int lock_folio_async(struct folio *folio, struct wait_page_queue *wait) { - if (!trylock_page(page)) - return __lock_page_async(page, wait); + if (!trylock_folio(folio)) + return __lock_folio_async(folio, wait); return 0; } diff --git a/mm/filemap.c b/mm/filemap.c index 5acadffed25d..b99b068bc058 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1507,18 +1507,18 @@ int __lock_folio_killable(struct folio *folio) } EXPORT_SYMBOL_GPL(__lock_folio_killable); -int __lock_page_async(struct page *page, struct wait_page_queue *wait) +int __lock_folio_async(struct folio *folio, struct wait_page_queue *wait) { - struct wait_queue_head *q = page_waitqueue(page); + struct wait_queue_head *q = page_waitqueue(&folio->page); int ret = 0; - wait->page = page; + wait->page = &folio->page; wait->bit_nr = PG_locked; spin_lock_irq(&q->lock); __add_wait_queue_entry_tail(q, &wait->wait); - SetPageWaiters(page); - ret = !trylock_page(page); + SetFolioWaiters(folio); + ret = !trylock_folio(folio); /* * If we were successful now, we know we're still on the * waitqueue as we're still under the lock. This means it's @@ -2265,41 +2265,42 @@ static int filemap_update_page(struct kiocb *iocb, struct address_space *mapping, struct iov_iter *iter, struct page *page) { + struct folio *folio = page_folio(page); int error; - if (!trylock_page(page)) { + if (!trylock_folio(folio)) { if (iocb->ki_flags & (IOCB_NOWAIT | IOCB_NOIO)) return -EAGAIN; if (!(iocb->ki_flags & IOCB_WAITQ)) { - put_and_wait_on_page_locked(page, TASK_KILLABLE); + put_and_wait_on_page_locked(&folio->page, TASK_KILLABLE); return AOP_TRUNCATED_PAGE; } - error = __lock_page_async(page, iocb->ki_waitq); + error = __lock_folio_async(folio, iocb->ki_waitq); if (error) return error; } - if (!page->mapping) + if (!folio->page.mapping) goto truncated; error = 0; - if (filemap_range_uptodate(mapping, iocb->ki_pos, iter, page)) + if (filemap_range_uptodate(mapping, iocb->ki_pos, iter, &folio->page)) goto unlock; error = -EAGAIN; if (iocb->ki_flags & (IOCB_NOIO | IOCB_NOWAIT | IOCB_WAITQ)) goto unlock; - error = filemap_read_page(iocb->ki_filp, mapping, page); + error = filemap_read_page(iocb->ki_filp, mapping, &folio->page); if (error == AOP_TRUNCATED_PAGE) - put_page(page); + put_folio(folio); return error; truncated: - unlock_page(page); - put_page(page); + unlock_folio(folio); + put_folio(folio); return AOP_TRUNCATED_PAGE; unlock: - unlock_page(page); + unlock_folio(folio); return error; }