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=-0.6 required=3.0 tests=DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,T_DKIM_INVALID 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 5785AC28CF6 for ; Thu, 26 Jul 2018 06:34:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DA60820846 for ; Thu, 26 Jul 2018 06:34:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=contabo.de header.i=@contabo.de header.b="0F4MucxB" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DA60820846 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=contabo.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728584AbeGZHt5 (ORCPT ); Thu, 26 Jul 2018 03:49:57 -0400 Received: from mail.contabo.com ([91.205.175.50]:60490 "EHLO mail.contabo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726430AbeGZHt4 (ORCPT ); Thu, 26 Jul 2018 03:49:56 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=contabo.de; s=default; h=Content-Transfer-Encoding:Content-Type:In-Reply-To:MIME-Version :Date:Message-ID:From:References:Cc:To:Subject:Sender:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=T463keRGKLfgwzudii1gCgUhx96wr1PclApmb5EFS9U=; b=0F4MucxBinCPP2ccISE1aelWoS ba56G6F4Z6/S7uZhps7xaCHw3OCcLiZPL1shw4h2QHbsn7rznKJTiZTYJZjyFXTpwl/y1kp1mZzJe jUH3P6i89XR8O6ev53mosgJrBPp6Y1AO4S/yp7PaPs5nWfJRTtjfnQURtTjSfqjHDsX4onGF9sSWW H96FlDX3Tb6SyCP/gCVCCMC6xX1HbUFq7yfrdenCzGADT0dMw9YosDoTgQV2vOq6BlnrcY4kX2s6s v+qbLotW4Pz+drWuSWER8z5QGoOTZXJTQc6lxM+ba0T0HpJjMHnJs8E/QZiEU9oN8QNr4xPmlEXpJ n3NkNQfA==; Received: from [178.238.239.246] (port=7490 helo=[192.168.178.123]) by mail.contabo.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) (Exim 4.91) (envelope-from ) id 1fiZrA-0003XH-G6; Thu, 26 Jul 2018 08:34:36 +0200 Subject: Re: Zram writeback feature unstable with heavy swap utilization - BUG: Bad page state in process... To: Minchan Kim Cc: ngupta@vflare.org, linux-kernel@vger.kernel.org, Sergey Senozhatsky , Andrew Morton References: <0516ae2d-b0fd-92c5-aa92-112ba7bd32fc@contabo.de> <20180724010342.GA195675@rodete-desktop-imager.corp.google.com> <20180725132126.GA2893@rodete-laptop-imager.corp.google.com> <20180726020351.GA221405@rodete-desktop-imager.corp.google.com> <1684cefc-c920-d53c-8d2d-c32da213a045@contabo.de> <20180726062106.GB221405@rodete-desktop-imager.corp.google.com> From: Tino Lehnig Message-ID: Date: Thu, 26 Jul 2018 08:34:36 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <20180726062106.GB221405@rodete-desktop-imager.corp.google.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - mail.contabo.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - contabo.de X-Get-Message-Sender-Via: mail.contabo.com: authenticated_id: tino.lehnig@contabo.de X-Authenticated-Sender: mail.contabo.com: tino.lehnig@contabo.de Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07/26/2018 08:21 AM, Minchan Kim wrote: > That means you could reproduce it without writeback feature? > If so, it would be more reasoanble to check [0bcac06f27d75, skip swapcache for swapin of synchronous device] No, the bug only occurs with a backing device. The writeback feature is enabled in the default Ubuntu kernel configuration. -- Kind regards, Tino Lehnig