From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bernd Schubert Subject: Re: RAID5 hard freeze Date: Tue, 04 Mar 2014 12:57:08 +0100 Message-ID: <5315BF94.50803@fastmail.fm> References: <20140225135809.0b1afc69@notabene.brown> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Denis Golovan , NeilBrown Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On 03/01/2014 03:54 PM, Denis Golovan wrote: > Hi again > > I was contacted by a person who suggested to double-check > vfs_cache_pressure setting. > And it appeared that I had this setting set to 10000. That was a > left-over from previously debugging OOM-killer case. > > When I removed this setting from sysctl.conf, I was able to greatly > increase the time to crash/freeze. > My server was able to withstand about a day of continuous write test. > > Nevertheless, it froze after that. > > Still it looks like something is wrong with RAID/filesystem co-operation. But why should it be RAID/filesystem and not hardware related or another linux subsystem? > > I would still like to debug the problem. > Please help. The only way to get more help and information is probably to attach a real serial console (i.e. ipmi-sol). Bernd