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=-9.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 00F0CC433E0 for ; Tue, 4 Aug 2020 07:24:37 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id F30022076C for ; Tue, 4 Aug 2020 07:24:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="EfWPZI0l" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org F30022076C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=virtualization-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id 959AD87B9B; Tue, 4 Aug 2020 07:24:36 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ToVZccXCRZGx; Tue, 4 Aug 2020 07:24:36 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by hemlock.osuosl.org (Postfix) with ESMTP id 1C50A87A14; Tue, 4 Aug 2020 07:24:36 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 05887C0050; Tue, 4 Aug 2020 07:24:36 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by lists.linuxfoundation.org (Postfix) with ESMTP id EE526C004C for ; Tue, 4 Aug 2020 07:24:34 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id DC36986B68 for ; Tue, 4 Aug 2020 07:24:34 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id pgksR74szwed for ; Tue, 4 Aug 2020 07:24:33 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [63.128.21.124]) by whitealder.osuosl.org (Postfix) with ESMTPS id 898E186777 for ; Tue, 4 Aug 2020 07:24:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1596525872; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Lt1g0htUa/bc8OboHGsnEp9sr/LuEltQUA5QpsfHh1k=; b=EfWPZI0lQtxajkAA+WIaNw6/CzBVcsFmUgCdx2xTI7/wXMUYYrEj0g8zT78f2CPgpysNuq JM1FrM8SruFTcsqutr7TwgekSXd1VrdsVvjf6ay/84m5aVSlvC5MH8gimJPBcPTGnz+UAx dy3QKVKX9E01gORXGNuuSszBqRO7w9A= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-488--bsXYjLqO0qVPCbYYyYWJA-1; Tue, 04 Aug 2020 03:24:30 -0400 X-MC-Unique: -bsXYjLqO0qVPCbYYyYWJA-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id EED8D79ED5; Tue, 4 Aug 2020 07:24:28 +0000 (UTC) Received: from t480s.redhat.com (ovpn-113-95.ams2.redhat.com [10.36.113.95]) by smtp.corp.redhat.com (Postfix) with ESMTP id F30575DA74; Tue, 4 Aug 2020 07:24:26 +0000 (UTC) From: David Hildenbrand To: linux-kernel@vger.kernel.org Subject: [PATCH v3 3/6] mm/page_isolation: drop WARN_ON_ONCE() in set_migratetype_isolate() Date: Tue, 4 Aug 2020 09:24:05 +0200 Message-Id: <20200804072408.5481-4-david@redhat.com> In-Reply-To: <20200804072408.5481-1-david@redhat.com> References: <20200804072408.5481-1-david@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Cc: Pankaj Gupta , Michal Hocko , Baoquan He , "Michael S . Tsirkin" , virtualization@lists.linux-foundation.org, linux-mm@kvack.org, Andrew Morton , Mike Kravetz X-BeenThere: virtualization@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux virtualization List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" Inside has_unmovable_pages(), we have a comment describing how unmovable data could end up in ZONE_MOVABLE - via "movable_core". Also, besides checking if the first page in the pageblock is reserved, we don't perform any further checks in case of ZONE_MOVABLE. In case of memory offlining, we set REPORT_FAILURE, properly dump_page() the page and handle the error gracefully. alloc_contig_pages() users currently never allocate from ZONE_MOVABLE. E.g., hugetlb uses alloc_contig_pages() for the allocation of gigantic pages only, which will never end up on the MOVABLE zone (see htlb_alloc_mask()). Reviewed-by: Baoquan He Cc: Andrew Morton Cc: Michal Hocko Cc: Michael S. Tsirkin Cc: Mike Kravetz Cc: Pankaj Gupta Signed-off-by: David Hildenbrand --- mm/page_isolation.c | 15 ++++++--------- 1 file changed, 6 insertions(+), 9 deletions(-) diff --git a/mm/page_isolation.c b/mm/page_isolation.c index 7d7d263ce7f4b..d099aac479601 100644 --- a/mm/page_isolation.c +++ b/mm/page_isolation.c @@ -57,15 +57,12 @@ static int set_migratetype_isolate(struct page *page, int migratetype, int isol_ spin_unlock_irqrestore(&zone->lock, flags); if (!ret) { drain_all_pages(zone); - } else { - WARN_ON_ONCE(zone_idx(zone) == ZONE_MOVABLE); - - if ((isol_flags & REPORT_FAILURE) && unmovable) - /* - * printk() with zone->lock held will likely trigger a - * lockdep splat, so defer it here. - */ - dump_page(unmovable, "unmovable page"); + } else if ((isol_flags & REPORT_FAILURE) && unmovable) { + /* + * printk() with zone->lock held will likely trigger a + * lockdep splat, so defer it here. + */ + dump_page(unmovable, "unmovable page"); } return ret; -- 2.26.2 _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization