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, 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 881B7C43461 for ; Tue, 15 Sep 2020 08:00:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4B4D821D24 for ; Tue, 15 Sep 2020 08:00:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726139AbgIOIAN (ORCPT ); Tue, 15 Sep 2020 04:00:13 -0400 Received: from mail1.windriver.com ([147.11.146.13]:41793 "EHLO mail1.windriver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726298AbgIOH5P (ORCPT ); Tue, 15 Sep 2020 03:57:15 -0400 Received: from ALA-HCB.corp.ad.wrs.com (ala-hcb.corp.ad.wrs.com [147.11.189.41]) by mail1.windriver.com (8.15.2/8.15.2) with ESMTPS id 08F7uiJU022562 (version=TLSv1 cipher=DHE-RSA-AES256-SHA bits=256 verify=FAIL); Tue, 15 Sep 2020 00:56:44 -0700 (PDT) Received: from pek-lpggp1.wrs.com (128.224.153.74) by ALA-HCB.corp.ad.wrs.com (147.11.189.41) with Microsoft SMTP Server id 14.3.487.0; Tue, 15 Sep 2020 00:56:36 -0700 From: To: CC: , Subject: [PATCH] mm/page_alloc.c: avoid inheritting current's flags when invoked in interrupt Date: Tue, 15 Sep 2020 15:56:35 +0800 Message-ID: <20200915075635.1112-1-yanfei.xu@windriver.com> X-Mailer: git-send-email 2.18.2 MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Yanfei Xu alloc_mask shouldn't inherit the current task's flags when __alloc_pages_nodemask is invoked in interrupt. Signed-off-by: Yanfei Xu --- mm/page_alloc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index fab5e97dc9ca..388b587b35a8 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -4889,7 +4889,8 @@ __alloc_pages_nodemask(gfp_t gfp_mask, unsigned int order, int preferred_nid, * from a particular context which has been marked by * memalloc_no{fs,io}_{save,restore}. */ - alloc_mask = current_gfp_context(gfp_mask); + if (!in_interrupt()) + alloc_mask = current_gfp_context(gfp_mask); ac.spread_dirty_pages = false; /* -- 2.18.2