From mboxrd@z Thu Jan 1 00:00:00 1970 From: Du Jun Subject: Re: raid related kernel hang in 2.6.36 Date: Wed, 24 Nov 2010 22:34:21 +0800 Message-ID: <4CED226D.6090602@perabytes.com> References: <4CED17A4.7050604@perabytes.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: =?UTF-8?B?TWF0aGlhcyBCdXLDqW4=?= Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids Their's no dmesg information at all before the hang. The system just=20 hangs suddenly without any kernel printk or oops. mdadm version is debian lenny version 2.6.7.2-3 I will get mdadm -E & mdadm -D informations tomorrow but I doubt they=20 are useful. Johnson on 2010/11/24 22:19, Mathias Bur=C3=A9n wrote: > Hi, > > I suppose a few logs would be interesting. (dmesg, mdadm -E (hdds), > mdadm -D md10, zcat /proc/config.gz, mdadm version) > > Regards, > // Mathias > > 2010/11/24 Du Jun: > =20 >> Hi, >> We just quick tested the raid stability under the vanilla 2.6.36 ker= nel >> and got an unstable result. >> >> first, we create a raid5 array using 16 sata disks: >> >> mdadm -C /dev/md10 -l 5 -n 16 /dev/sd[b-q] >> >> then use dd to stress the io: >> >> dd if=3D/dev/zero of=3D/dev/md10 bs=3D1M >> >> After a while, usually several minutes, the system hangs. It looks l= ike >> some kind of kernel deadlock. ping to this machine could get timely >> response, however, any other process just hangs. >> >> It is easily reproducible and everytime the test result is a system = hang. >> >> Johnson >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-raid= " in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> >> =20 > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid"= in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > > > =20 -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html