From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f72.google.com (mail-pg0-f72.google.com [74.125.83.72]) by kanga.kvack.org (Postfix) with ESMTP id 859EC6B0005 for ; Wed, 14 Feb 2018 16:52:49 -0500 (EST) Received: by mail-pg0-f72.google.com with SMTP id c18so2451211pgv.8 for ; Wed, 14 Feb 2018 13:52:49 -0800 (PST) Received: from ipmailnode02.adl6.internode.on.net (ipmailnode02.adl6.internode.on.net. [150.101.137.148]) by mx.google.com with ESMTP id e5si3151258pgp.469.2018.02.14.13.52.47 for ; Wed, 14 Feb 2018 13:52:48 -0800 (PST) Date: Thu, 15 Feb 2018 08:52:45 +1100 From: Dave Chinner Subject: Re: freezing system for several second on high I/O [kernel 4.15] Message-ID: <20180214215245.GI7000@dastard> References: <20180131022209.lmhespbauhqtqrxg@destitution> <1517888875.7303.3.camel@gmail.com> <20180206060840.kj2u6jjmkuk3vie6@destitution> <1517974845.4352.8.camel@gmail.com> <20180207065520.66f6gocvxlnxmkyv@destitution> <1518255240.31843.6.camel@gmail.com> <1518255352.31843.8.camel@gmail.com> <20180211225657.GA6778@dastard> <1518643669.6070.21.camel@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1518643669.6070.21.camel@gmail.com> Sender: owner-linux-mm@kvack.org List-ID: To: mikhail Cc: "linux-xfs@vger.kernel.org" , "linux-mm@kvack.org" On Thu, Feb 15, 2018 at 02:27:49AM +0500, mikhail wrote: > On Mon, 2018-02-12 at 09:56 +1100, Dave Chinner wrote: > > IOWs, this is not an XFS problem. It's exactly what I'd expect > > to see when you try to run a very IO intensive workload on a > > cheap SATA drive that can't keep up with what is being asked of > > it.... > > > > I am understand that XFS is not culprit here. But I am worried > about of interface freezing and various kernel messages with > traces which leads to XFS. This is my only clue, and I do not know > where to dig yet. I've already told you the problem: sustained storage subsystem overload. You can't "tune" you way around that. i.e. You need a faster disk subsystem to maintian the load you are putting on your system - either add more disks (e.g. RAID 0/5/6) or to move to SSDs. Cheers, Dave. -- Dave Chinner david@fromorbit.com -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org