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=-12.7 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 586BAC433DF for ; Tue, 13 Oct 2020 14:43:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 12ECD24886 for ; Tue, 13 Oct 2020 14:43:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730382AbgJMOnn (ORCPT ); Tue, 13 Oct 2020 10:43:43 -0400 Received: from mx2.suse.de ([195.135.220.15]:36844 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730260AbgJMOnf (ORCPT ); Tue, 13 Oct 2020 10:43:35 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 151DFB199; Tue, 13 Oct 2020 14:43:34 +0000 (UTC) From: Oscar Salvador To: n-horiguchi@ah.jp.nec.com Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Oscar Salvador Subject: [PATCH v5 4/4] mm,hwpoison: drop unneeded pcplist draining Date: Tue, 13 Oct 2020 16:44:47 +0200 Message-Id: <20201013144447.6706-5-osalvador@suse.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201013144447.6706-1-osalvador@suse.de> References: <20201013144447.6706-1-osalvador@suse.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org memory_failure and soft_offline_path paths now drain pcplists by calling get_hwpoison_page. memory_failure flags the page as HWPoison before, so that page cannot longer go into a pcplist, and soft_offline_page only flags a page as HWPoison if 1) we took the page off a buddy freelist 2) the page was in-use and we migrated it 3) was a clean pagecache. Because of that, a page cannot longer be poisoned and be in a pcplist. Signed-off-by: Oscar Salvador --- mm/madvise.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/mm/madvise.c b/mm/madvise.c index 416a56b8e757..c6b5524add58 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -877,7 +877,6 @@ static long madvise_remove(struct vm_area_struct *vma, static int madvise_inject_error(int behavior, unsigned long start, unsigned long end) { - struct zone *zone; unsigned long size; if (!capable(CAP_SYS_ADMIN)) @@ -922,10 +921,6 @@ static int madvise_inject_error(int behavior, return ret; } - /* Ensure that all poisoned pages are removed from per-cpu lists */ - for_each_populated_zone(zone) - drain_all_pages(zone); - return 0; } #endif -- 2.26.2