From patchwork Wed Mar 31 18:47:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 12176005 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,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 7C768C433ED for ; Wed, 31 Mar 2021 18:55:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5245461057 for ; Wed, 31 Mar 2021 18:55:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236144AbhCaSyf (ORCPT ); Wed, 31 Mar 2021 14:54:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46636 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235472AbhCaSyE (ORCPT ); Wed, 31 Mar 2021 14:54:04 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EA41DC061574; Wed, 31 Mar 2021 11:54:03 -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=s4lQvo5EDcflactPiclRCs2NR/gq/ASPjSTuH+CL/fc=; b=JHaLLCqmEjt3aNc6Sq9DsHwUCE 7+JgMtcg6Hqm8raBF6YF0O9kZMp6DlNFDJapZKQHHVhc+9aKk29kjVWVJCXvrh5/dZ64L/oXRXU+h lwSVCg1lK6F6150G2Cc3FHnWF3ng9cdpd0dgT815iMLtxFOkBtY0TmW4FU8Bew60Cp02MJA8eoE53 Mz6XLUh5tk1albnQ8oqHFfZqfE6ntA2qovZg09XGDUZTKSCSV3SaikJ6TOWQMk5+V48txMR3u88ss qc003wu9FgbFeA/T6YnxzAdr8yREfoIO5SULLOEVWklDvMqB+C3Tg65Y4IbI/5M9TZMLRzSIjunnw j8tkJj3g==; Received: from willy by casper.infradead.org with local (Exim 4.94 #2 (Red Hat Linux)) id 1lRfyT-004zjT-Ey; Wed, 31 Mar 2021 18:53:54 +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 v6 21/27] mm/filemap: Add wait_on_folio_locked Date: Wed, 31 Mar 2021 19:47:22 +0100 Message-Id: <20210331184728.1188084-22-willy@infradead.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210331184728.1188084-1-willy@infradead.org> References: <20210331184728.1188084-1-willy@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Also add wait_on_folio_locked_killable(). Turn wait_on_page_locked() and wait_on_page_locked_killable() into wrappers. This eliminates a call to compound_head() from each call-site, reducing text size by 200 bytes for me. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig --- include/linux/pagemap.h | 26 ++++++++++++++++++-------- mm/filemap.c | 4 ++-- 2 files changed, 20 insertions(+), 10 deletions(-) diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 43664bef7392..a7bbc34d92cb 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -798,23 +798,33 @@ extern void wait_on_page_bit(struct page *page, int bit_nr); extern int wait_on_page_bit_killable(struct page *page, int bit_nr); /* - * Wait for a page to be unlocked. + * Wait for a folio to be unlocked. * - * This must be called with the caller "holding" the page, - * ie with increased "page->count" so that the page won't + * This must be called with the caller "holding" the folio, + * ie with increased "page->count" so that the folio won't * go away during the wait.. */ +static inline void wait_on_folio_locked(struct folio *folio) +{ + if (FolioLocked(folio)) + wait_on_page_bit(&folio->page, PG_locked); +} + +static inline int wait_on_folio_locked_killable(struct folio *folio) +{ + if (!FolioLocked(folio)) + return 0; + return wait_on_page_bit_killable(&folio->page, PG_locked); +} + static inline void wait_on_page_locked(struct page *page) { - if (PageLocked(page)) - wait_on_page_bit(compound_head(page), PG_locked); + wait_on_folio_locked(page_folio(page)); } static inline int wait_on_page_locked_killable(struct page *page) { - if (!PageLocked(page)) - return 0; - return wait_on_page_bit_killable(compound_head(page), PG_locked); + return wait_on_folio_locked_killable(page_folio(page)); } int put_and_wait_on_page_locked(struct page *page, int state); diff --git a/mm/filemap.c b/mm/filemap.c index c0a986ac830f..21607db04835 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1604,9 +1604,9 @@ int __lock_folio_or_retry(struct folio *folio, struct mm_struct *mm, mmap_read_unlock(mm); if (flags & FAULT_FLAG_KILLABLE) - wait_on_page_locked_killable(page); + wait_on_folio_locked_killable(folio); else - wait_on_page_locked(page); + wait_on_folio_locked(folio); return 0; } if (flags & FAULT_FLAG_KILLABLE) {