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=-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 3E686C433C1 for ; Sat, 20 Mar 2021 05:43:27 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id E162C6193E for ; Sat, 20 Mar 2021 05:43:26 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E162C6193E 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 8640D8D000D; Sat, 20 Mar 2021 01:43:26 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 814B96B0099; Sat, 20 Mar 2021 01:43:26 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 63FC48D000D; Sat, 20 Mar 2021 01:43:26 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0106.hostedemail.com [216.40.44.106]) by kanga.kvack.org (Postfix) with ESMTP id 408046B0098 for ; Sat, 20 Mar 2021 01:43:26 -0400 (EDT) Received: from smtpin28.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 07835A741 for ; Sat, 20 Mar 2021 05:43:26 +0000 (UTC) X-FDA: 77939160012.28.285363E Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf15.hostedemail.com (Postfix) with ESMTP id AE79AA0000FA for ; Sat, 20 Mar 2021 05:43:24 +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=fUOqF+m0UOFmZfY0NeH5xskC2lEFZxO68WMcUyGRPhg=; b=EgMmKFgDmYscwvdDutIm/PsLr6 hVo+HCOEtjVhaHn0/p0naVyr9Q/vCpu+QFDDjHTieD+PaVdN/GX4vx+VhPKIOQ0Ef0UIfdEvawH/T e6muUaJoSrPowvVVOPKxBLqBaM1gD1uA5Rd9wtnQ1rzo9GBa9QdFnbD1PU0VbbIMY2nB5ehcZYl3Q Vmjr0Pg+bj/DTSqkzgWMM9ytl4Ls9DCNE4yoXGPjXBJ9FY4yJC8qRz5ELmW84X4Yk9PpoYzqNXAI5 Z/lSl/uwtJE5lqdwMxXfr5BDfaTObxUYg0vX+SVAdjIDHXJh1KAsbuTzsKkjOBoK4zFczwo2AJ1MZ BrjST5zA==; Received: from willy by casper.infradead.org with local (Exim 4.94 #2 (Red Hat Linux)) id 1lNUOD-005Sde-8I; Sat, 20 Mar 2021 05:43:12 +0000 From: "Matthew Wilcox (Oracle)" To: linux-mm@kvack.org Cc: "Matthew Wilcox (Oracle)" , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-cachefs@redhat.com, linux-afs@lists.infradead.org Subject: [PATCH v5 18/27] mm/filemap: Add __lock_folio_async Date: Sat, 20 Mar 2021 05:40:55 +0000 Message-Id: <20210320054104.1300774-19-willy@infradead.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210320054104.1300774-1-willy@infradead.org> References: <20210320054104.1300774-1-willy@infradead.org> MIME-Version: 1.0 X-Stat-Signature: gxiqh76uexwizjesgjxc9e7ufuaob84d X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: AE79AA0000FA Received-SPF: none (infradead.org>: No applicable sender policy available) receiver=imf15; identity=mailfrom; envelope-from=""; helo=casper.infradead.org; client-ip=90.155.50.34 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1616219004-101004 Content-Transfer-Encoding: quoted-printable 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: There aren't any actual callers of lock_page_async(), so remove it. 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 | 17 ----------------- mm/filemap.c | 31 ++++++++++++++++--------------- 3 files changed, 17 insertions(+), 33 deletions(-) diff --git a/fs/io_uring.c b/fs/io_uring.c index b882bc4c5af7..ad0dc9afd194 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -3201,7 +3201,7 @@ static int io_read_prep(struct io_kiocb *req, const= struct io_uring_sqe *sqe) } =20 /* - * 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 waitqueu= e. * This gets called when the page is unlocked, and we generally expect t= hat to * happen when the page IO is completed and the page is now uptodate. Th= is will diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index aa7f564e5ecf..3cd1b5e28593 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -695,7 +695,6 @@ static inline bool wake_page_match(struct wait_page_q= ueue *wait_page, =20 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); extern int __lock_page_or_retry(struct page *page, struct mm_struct *mm, unsigned int flags); void unlock_page(struct page *page); @@ -753,22 +752,6 @@ static inline int lock_page_killable(struct page *pa= ge) return lock_folio_killable(page_folio(page)); } =20 -/* - * lock_page_async - Lock the page, unless this would block. If the page - * is already locked, then queue a callback when the page becomes unlock= ed. - * This callback can then retry the operation. - * - * Returns 0 if the page is locked successfully, or -EIOCBQUEUED if the = page - * was already locked and the callback defined in 'wait' was queued. - */ -static inline int lock_page_async(struct page *page, - struct wait_page_queue *wait) -{ - if (!trylock_page(page)) - return __lock_page_async(page, wait); - return 0; -} - /* * lock_page_or_retry - Lock the page, unless this would block and the * caller indicated that it can handle a retry. diff --git a/mm/filemap.c b/mm/filemap.c index 7cac47db78a5..12dc672adc2e 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1554,18 +1554,18 @@ int __lock_folio_killable(struct folio *folio) } EXPORT_SYMBOL_GPL(__lock_folio_killable); =20 -int __lock_page_async(struct page *page, struct wait_page_queue *wait) +static int __lock_folio_async(struct folio *folio, struct wait_page_queu= e *wait) { - struct wait_queue_head *q =3D page_waitqueue(page); + struct wait_queue_head *q =3D page_waitqueue(&folio->page); int ret =3D 0; =20 - wait->page =3D page; + wait->page =3D &folio->page; wait->bit_nr =3D PG_locked; =20 spin_lock_irq(&q->lock); __add_wait_queue_entry_tail(q, &wait->wait); - SetPageWaiters(page); - ret =3D !trylock_page(page); + SetFolioWaiters(folio); + ret =3D !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 @@ -2312,41 +2312,42 @@ static int filemap_update_page(struct kiocb *iocb= , struct address_space *mapping, struct iov_iter *iter, struct page *page) { + struct folio *folio =3D page_folio(page); int error; =20 - 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 =3D __lock_page_async(page, iocb->ki_waitq); + error =3D __lock_folio_async(folio, iocb->ki_waitq); if (error) return error; } =20 - if (!page->mapping) + if (!folio->page.mapping) goto truncated; =20 error =3D 0; - if (filemap_range_uptodate(mapping, iocb->ki_pos, iter, page)) + if (filemap_range_uptodate(mapping, iocb->ki_pos, iter, &folio->page)) goto unlock; =20 error =3D -EAGAIN; if (iocb->ki_flags & (IOCB_NOIO | IOCB_NOWAIT | IOCB_WAITQ)) goto unlock; =20 - error =3D filemap_read_page(iocb->ki_filp, mapping, page); + error =3D filemap_read_page(iocb->ki_filp, mapping, &folio->page); if (error =3D=3D 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; } =20 --=20 2.30.2