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=-12.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,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 07A19C55179 for ; Thu, 29 Oct 2020 19:34:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A426F207DE for ; Thu, 29 Oct 2020 19:34:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="kqmrBljn" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726518AbgJ2TeT (ORCPT ); Thu, 29 Oct 2020 15:34:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56548 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726461AbgJ2TeP (ORCPT ); Thu, 29 Oct 2020 15:34:15 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7B43FC0613D2 for ; Thu, 29 Oct 2020 12:34:15 -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=9jHZ5GBv8es5xhWOYPp8bxpNJzE+ReAs7wgmc5S+gNQ=; b=kqmrBljnmjaTQvkFMi1WHooSuA 0QUGbNxPu826EVcm6Lisk4YJeN/cmFioWhhmvI5Ht9FRuJ5FI48bubHzDj43/Jm2yluBYF9Dw1m2Q NCpx86vk0VZNMZ36YaDN66SivObYsJFcvyP4BYwdcsKH2yc+W7Q+oS79RrmAxmK9dOZs+a5sOyCco p0vD8Sxh0gr50U27O6CEW8neQxQNZWqg5MxMHHQ5eaIkqnzRIZs8f54ATCKtCazKyGfoyhnWYDUjz 2RC4RB+Nn5ib2cjZscK1pg4cXzxUvaJnsb996ggqJLTXoHbeY6rI5vVeBMf8tCUtkoR1SIqSOXdkf MzdUImBQ==; Received: from willy by casper.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kYDgY-0007cM-NC; Thu, 29 Oct 2020 19:34:10 +0000 From: "Matthew Wilcox (Oracle)" To: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" Subject: [PATCH 12/19] mm: Pass a sleep state to put_and_wait_on_page_locked Date: Thu, 29 Oct 2020 19:33:58 +0000 Message-Id: <20201029193405.29125-13-willy@infradead.org> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20201029193405.29125-1-willy@infradead.org> References: <20201029193405.29125-1-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) --- 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 bb6692001028..b5baaf1347e2 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -699,8 +699,7 @@ 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 91145e33635d..215729048cbd 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1369,20 +1369,23 @@ 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 03374ec61b45..580afce93d4a 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1432,7 +1432,7 @@ 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; } @@ -1468,7 +1468,7 @@ 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 39663dfbc273..a50bbb0e029b 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); -- 2.28.0