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=-6.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 9F1B9C433E2 for ; Mon, 14 Sep 2020 19:44:51 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 35FE32193E for ; Mon, 14 Sep 2020 19:44:50 +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="a0GZ9W9D" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 35FE32193E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 69F0F6E566; Mon, 14 Sep 2020 19:44:50 +0000 (UTC) Received: from us-smtp-delivery-1.mimecast.com (us-smtp-2.mimecast.com [205.139.110.61]) by gabe.freedesktop.org (Postfix) with ESMTPS id 73B076E566 for ; Mon, 14 Sep 2020 19:44:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600112688; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=A/DjrjveF5/2wA8RTl0T9a0Cox1J1OLY+rMuhaYpfao=; b=a0GZ9W9D3oFXeXyHPUCNVgXrvPu/YxXS0Ear2g1PWJjTKmdrVhVhauntWelzWi8Wj4I3R5 oUyl03UlbEE2giyk67lqGTqflxPUfWjIOnDJ6D4JxHUbc9DYu2uTWU2LYPYOuJRW+EzmOF KgYgFgoZfInJFQ1BbN3Nb/kAUD09DQc= 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-210-JgGmMpLmOG2xlwIrBHTevw-1; Mon, 14 Sep 2020 15:44:43 -0400 X-MC-Unique: JgGmMpLmOG2xlwIrBHTevw-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 773238015AA; Mon, 14 Sep 2020 19:44:41 +0000 (UTC) Received: from ovpn-113-249.rdu2.redhat.com (ovpn-113-249.rdu2.redhat.com [10.10.113.249]) by smtp.corp.redhat.com (Postfix) with ESMTP id ACF737513E; Mon, 14 Sep 2020 19:44:39 +0000 (UTC) Message-ID: <05803c18b64db8a811c692bcbdc03172935ea483.camel@redhat.com> From: Qian Cai To: Matthew Wilcox Date: Mon, 14 Sep 2020 15:44:39 -0400 In-Reply-To: <20200914165032.GS6583@casper.infradead.org> References: <20200910183318.20139-1-willy@infradead.org> <20200910183318.20139-4-willy@infradead.org> <20200914165032.GS6583@casper.infradead.org> Mime-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Subject: Re: [Intel-gfx] [PATCH v2 3/8] mm: Optimise madvise WILLNEED X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: William Kucharski , intel-gfx@lists.freedesktop.org, Johannes Weiner , Hugh Dickins , linux-kernel@vger.kernel.org, Chris Wilson , linux-mm@kvack.org, Matthew Auld , Huang Ying , cgroups@vger.kernel.org, Andrew Morton , Alexey Dobriyan Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" On Mon, 2020-09-14 at 17:50 +0100, Matthew Wilcox wrote: > On Mon, Sep 14, 2020 at 12:17:07PM -0400, Qian Cai wrote: > > Reverting the "Return head pages from find_*_entry" patchset [1] up to this > > patch fixed the issue that LTP madvise06 test [2] would trigger endless > > soft- > > lockups below. It does not help after applied patches fixed other separate > > issues in the patchset [3][4]. > > Thanks for the report. Could you try this? It works fine. > > diff --git a/mm/madvise.c b/mm/madvise.c > index 96189acd6969..2d9ceccb338d 100644 > --- a/mm/madvise.c > +++ b/mm/madvise.c > @@ -234,6 +234,7 @@ static void force_shm_swapin_readahead(struct > vm_area_struct *vma, > > if (!xa_is_value(page)) > continue; > + xas_pause(&xas); > rcu_read_unlock(); > > swap = radix_to_swp_entry(page); > @@ -243,7 +244,6 @@ static void force_shm_swapin_readahead(struct > vm_area_struct *vma, > put_page(page); > > rcu_read_lock(); > - xas_reset(&xas); > } > rcu_read_unlock(); > > _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx