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=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 E15D4C433E6 for ; Thu, 21 Jan 2021 04:27:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AB1B42389B for ; Thu, 21 Jan 2021 04:27:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728638AbhAUE1l (ORCPT ); Wed, 20 Jan 2021 23:27:41 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34312 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728016AbhAUEV3 (ORCPT ); Wed, 20 Jan 2021 23:21:29 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8BF3AC0613D3 for ; Wed, 20 Jan 2021 20:20:49 -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=HzHUuJikVV1y3JaLjou2Jc0YDgu/6ReouCVS0QVD5No=; b=tdflJOWumBDFY7spMDMq1rzazb FVUiLcrT5vZ3tVSdcyLYZsKD5lWtWZhHS+ev65UmMrWbxp/TAcxoyTTg+ib21GP7Jrp6efp2L1icU u6/8XrQBDfx11udFpvyTm9Gasal1CSsk0q9jbnHS3Yjs+kt399CQZOwkbr5raIL64K5t2oJdC0wKL PGzp51bO0sAWspb0tZwcaZ40aMw/3xD1izEFuHlZcG6MhDBYz62XxBAh6lGVkiBjZm2ADLchl1TNv +xPDAiZCK5XqHU0YhgSXZY62fFnbdJ1qOoISAmXYe/+FmNkdq5GuUPyy3STVUtSv+MHP5SXAD2Bq2 /maO801A==; Received: from willy by casper.infradead.org with local (Exim 4.94 #2 (Red Hat Linux)) id 1l2RRW-00GbGL-G2; Thu, 21 Jan 2021 04:19:49 +0000 From: "Matthew Wilcox (Oracle)" To: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Cc: "Matthew Wilcox (Oracle)" , hch@lst.de, kent.overstreet@gmail.com Subject: [PATCH v4 05/18] mm/filemap: Pass a sleep state to put_and_wait_on_page_locked Date: Thu, 21 Jan 2021 04:16:03 +0000 Message-Id: <20210121041616.3955703-6-willy@infradead.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210121041616.3955703-1-willy@infradead.org> References: <20210121041616.3955703-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org This is prep work for the next patch, but I think at least one of the current callers would prefer a killable sleep to an uninterruptible one. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Kent Overstreet Reviewed-by: Christoph Hellwig --- include/linux/pagemap.h | 3 +-- mm/filemap.c | 7 +++++-- mm/huge_memory.c | 4 ++-- mm/migrate.c | 4 ++-- 4 files changed, 10 insertions(+), 8 deletions(-) diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 932a260a29f20..55c3b299a9e47 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -679,8 +679,7 @@ static inline int wait_on_page_locked_killable(struct page *page) return wait_on_page_bit_killable(compound_head(page), PG_locked); } -extern void put_and_wait_on_page_locked(struct page *page); - +int put_and_wait_on_page_locked(struct page *page, int state); void wait_on_page_writeback(struct page *page); extern void end_page_writeback(struct page *page); void wait_for_stable_page(struct page *page); diff --git a/mm/filemap.c b/mm/filemap.c index 3e6fae3208906..c8ec47f3c3a17 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1383,20 +1383,23 @@ static int wait_on_page_locked_async(struct page *page, /** * put_and_wait_on_page_locked - Drop a reference and wait for it to be unlocked * @page: The page to wait for. + * @state: The sleep state (TASK_KILLABLE, TASK_UNINTERRUPTIBLE, etc). * * The caller should hold a reference on @page. They expect the page to * become unlocked relatively soon, but do not wish to hold up migration * (for example) by holding the reference while waiting for the page to * come unlocked. After this function returns, the caller should not * dereference @page. + * + * Return: 0 if the page was unlocked or -EINTR if interrupted by a signal. */ -void put_and_wait_on_page_locked(struct page *page) +int put_and_wait_on_page_locked(struct page *page, int state) { wait_queue_head_t *q; page = compound_head(page); q = page_waitqueue(page); - wait_on_page_bit_common(q, page, PG_locked, TASK_UNINTERRUPTIBLE, DROP); + return wait_on_page_bit_common(q, page, PG_locked, state, DROP); } /** diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 08a183f6c3ab0..948e61062660b 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1428,7 +1428,7 @@ vm_fault_t do_huge_pmd_numa_page(struct vm_fault *vmf, pmd_t pmd) if (!get_page_unless_zero(page)) goto out_unlock; spin_unlock(vmf->ptl); - put_and_wait_on_page_locked(page); + put_and_wait_on_page_locked(page, TASK_UNINTERRUPTIBLE); goto out; } @@ -1464,7 +1464,7 @@ vm_fault_t do_huge_pmd_numa_page(struct vm_fault *vmf, pmd_t pmd) if (!get_page_unless_zero(page)) goto out_unlock; spin_unlock(vmf->ptl); - put_and_wait_on_page_locked(page); + put_and_wait_on_page_locked(page, TASK_UNINTERRUPTIBLE); goto out; } diff --git a/mm/migrate.c b/mm/migrate.c index c1585ec29827c..4d71fd5fe856b 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -335,7 +335,7 @@ void __migration_entry_wait(struct mm_struct *mm, pte_t *ptep, if (!get_page_unless_zero(page)) goto out; pte_unmap_unlock(ptep, ptl); - put_and_wait_on_page_locked(page); + put_and_wait_on_page_locked(page, TASK_UNINTERRUPTIBLE); return; out: pte_unmap_unlock(ptep, ptl); @@ -369,7 +369,7 @@ void pmd_migration_entry_wait(struct mm_struct *mm, pmd_t *pmd) if (!get_page_unless_zero(page)) goto unlock; spin_unlock(ptl); - put_and_wait_on_page_locked(page); + put_and_wait_on_page_locked(page, TASK_UNINTERRUPTIBLE); return; unlock: spin_unlock(ptl); -- 2.29.2