From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mondschein.lichtvoll.de ([194.150.191.11]:45976 "EHLO mail.lichtvoll.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750934AbbLNH7u convert rfc822-to-8bit (ORCPT ); Mon, 14 Dec 2015 02:59:50 -0500 From: Martin Steigerwald To: Marc MERLIN Cc: Btrfs BTRFS Subject: still kworker at 100% cpu in all of device size allocated with chunks situations with write load (was: Re: Still not production ready) Date: Mon, 14 Dec 2015 08:59:48 +0100 Message-ID: <1564094.hdGdVPRvJz@merkaba> In-Reply-To: <20151213231914.GJ2662@merlins.org> References: <8336788.myI8ELqtIK@merkaba> <20151213231914.GJ2662@merlins.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Sender: linux-btrfs-owner@vger.kernel.org List-ID: Am Sonntag, 13. Dezember 2015, 15:19:14 CET schrieb Marc MERLIN: > On Sun, Dec 13, 2015 at 11:35:08PM +0100, Martin Steigerwald wrote: > > Hi! > > > > For me it is still not production ready. Again I ran into: > > > > btrfs kworker thread uses up 100% of a Sandybridge core for minutes on > > random write into big file > > https://bugzilla.kernel.org/show_bug.cgi?id=90401 > > Sorry you're having issues. I haven't seen this before myself. > I couldn't find the kernel version you're using in your Email or the bug > you filed (quick scan). > > That's kind of important :) I definately know this much. :) It happened with 4.3 yesterday. The other kernel version was 3.18. Information should be in the bug report. Yeah, 3.18 as mentioned in the Kernel Version field. And 4.3 as I mentioned in the last comment of the bug report. The scrubbing issue is I think since 4.3, I also seen it with 4.4-rc2/rc4 I believe, but I didnīt go back then to check more toroughly. I didnīt report the scrubbing issue with bugzilla yet as I got no feedback on my mailing list posts so far. I will bump the thread in a moment and suggest we discuss free space issue here and scrubbing issue in the other thread. I went back to 4.3 cause 4.4-rc2/4 does not even boot on my machine most of the times. I also reported this (BTRFS unrelated one). Thanks, -- Martin