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=-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=unavailable 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 EF29AC2B9F4 for ; Mon, 14 Jun 2021 20:31:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D0C7A60FEA for ; Mon, 14 Jun 2021 20:31:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235524AbhFNUdN (ORCPT ); Mon, 14 Jun 2021 16:33:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51412 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233479AbhFNUdK (ORCPT ); Mon, 14 Jun 2021 16:33:10 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 02EDDC061574; Mon, 14 Jun 2021 13:31:07 -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=ar7nQVYv2B1JNHOxI2UudAKG3cCri+N4AutaF8gvmKE=; b=wDhsy6Y3+qQzx3cs1P66WYh5Lq Tc/HoPtOf2TZ/Uy0UQPa/pFFtA/sXoVjaG6MNyzn4T94uRMHvALZ5C208golm55KOGBbDDpuWXXxr Svb/BLT3WZ9xYHpmSrPQpf1pBGAEUBRDHftYfVQT1/gRQe+5R8w/Nu1N2TJOAGl2wFkzAJUOWPB4F +ONcZPNTd7WtRV08vOgdeR7b099rdtM7qb9kjw+oTqzyNz7rZrx17sYDiWQhDZDRIi82IDael+pdY 5D8CSb+F8uZyRCqGld5MZZPXq3KrVdXzXPrTyaVUaqwDf7SO7D318Wg1wl8v1QqAvMG4IDrydttW6 K1MQoaRg==; Received: from willy by casper.infradead.org with local (Exim 4.94 #2 (Red Hat Linux)) id 1lstDK-005o5x-Vk; Mon, 14 Jun 2021 20:29:59 +0000 From: "Matthew Wilcox (Oracle)" To: akpm@linux-foundation.org Cc: "Matthew Wilcox (Oracle)" , linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Christoph Hellwig , Jeff Layton , "Kirill A . Shutemov" , Vlastimil Babka , William Kucharski Subject: [PATCH v11 25/33] mm/filemap: Add folio_end_writeback() Date: Mon, 14 Jun 2021 21:14:27 +0100 Message-Id: <20210614201435.1379188-26-willy@infradead.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210614201435.1379188-1-willy@infradead.org> References: <20210614201435.1379188-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add an end_page_writeback() wrapper function for users that are not yet converted to folios. folio_end_writeback() is less than half the size of end_page_writeback() at just 105 bytes compared to 228 bytes, due to removing all the compound_head() calls. The 30 byte wrapper function makes this a net saving of 93 bytes. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig Acked-by: Jeff Layton Acked-by: Kirill A. Shutemov Acked-by: Vlastimil Babka Reviewed-by: William Kucharski --- include/linux/pagemap.h | 3 ++- mm/filemap.c | 43 ++++++++++++++++++++--------------------- mm/folio-compat.c | 6 ++++++ 3 files changed, 29 insertions(+), 23 deletions(-) diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 051f51f6d642..2aa20394b103 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -756,7 +756,8 @@ static inline int wait_on_page_locked_killable(struct page *page) int put_and_wait_on_page_locked(struct page *page, int state); void wait_on_page_writeback(struct page *page); int wait_on_page_writeback_killable(struct page *page); -extern void end_page_writeback(struct page *page); +void end_page_writeback(struct page *page); +void folio_end_writeback(struct folio *folio); void wait_for_stable_page(struct page *page); void page_endio(struct page *page, bool is_write, int err); diff --git a/mm/filemap.c b/mm/filemap.c index 3688c1f0651a..eb95a95d90c5 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1175,11 +1175,11 @@ static void wake_up_page_bit(struct page *page, int bit_nr) spin_unlock_irqrestore(&q->lock, flags); } -static void wake_up_page(struct page *page, int bit) +static void folio_wake(struct folio *folio, int bit) { - if (!PageWaiters(page)) + if (!folio_waiters(folio)) return; - wake_up_page_bit(page, bit); + wake_up_page_bit(&folio->page, bit); } /* @@ -1516,39 +1516,38 @@ int wait_on_page_private_2_killable(struct page *page) EXPORT_SYMBOL(wait_on_page_private_2_killable); /** - * end_page_writeback - end writeback against a page - * @page: the page + * folio_end_writeback - End writeback against a folio. + * @folio: The folio. */ -void end_page_writeback(struct page *page) +void folio_end_writeback(struct folio *folio) { /* - * TestClearPageReclaim could be used here but it is an atomic - * operation and overkill in this particular case. Failing to - * shuffle a page marked for immediate reclaim is too mild to - * justify taking an atomic operation penalty at the end of - * ever page writeback. + * folio_test_clear_reclaim_flag() could be used here but it is an + * atomic operation and overkill in this particular case. Failing + * to shuffle a folio marked for immediate reclaim is too mild + * a gain to justify taking an atomic operation penalty at the + * end of every folio writeback. */ - if (PageReclaim(page)) { - struct folio *folio = page_folio(page); - ClearPageReclaim(page); + if (folio_reclaim(folio)) { + folio_clear_reclaim_flag(folio); folio_rotate_reclaimable(folio); } /* - * Writeback does not hold a page reference of its own, relying + * Writeback does not hold a folio reference of its own, relying * on truncation to wait for the clearing of PG_writeback. - * But here we must make sure that the page is not freed and - * reused before the wake_up_page(). + * But here we must make sure that the folio is not freed and + * reused before the folio_wake(). */ - get_page(page); - if (!test_clear_page_writeback(page)) + folio_get(folio); + if (!test_clear_page_writeback(&folio->page)) BUG(); smp_mb__after_atomic(); - wake_up_page(page, PG_writeback); - put_page(page); + folio_wake(folio, PG_writeback); + folio_put(folio); } -EXPORT_SYMBOL(end_page_writeback); +EXPORT_SYMBOL(folio_end_writeback); /* * After completing I/O on a page, call this routine to update the page diff --git a/mm/folio-compat.c b/mm/folio-compat.c index 91b3d00a92f7..526843d03d58 100644 --- a/mm/folio-compat.c +++ b/mm/folio-compat.c @@ -17,3 +17,9 @@ void unlock_page(struct page *page) return folio_unlock(page_folio(page)); } EXPORT_SYMBOL(unlock_page); + +void end_page_writeback(struct page *page) +{ + return folio_end_writeback(page_folio(page)); +} +EXPORT_SYMBOL(end_page_writeback); -- 2.30.2