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Re: Software raid 5 with XFS causing strange lockup problems

To: "Eric Sandeen" <sandeen@xxxxxxxxxxx>, xfs@xxxxxxxxxxx
Subject: Re: Software raid 5 with XFS causing strange lockup problems
From: "Ian Williamson" <notian@xxxxxxxxx>
Date: Wed, 11 Oct 2006 11:21:51 -0500
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Eric,
That's all I have for the event in /var/log/messages..

For the raid configuration I have the following:
ian@ionlinux:~$ sudo mdadm --detail /dev/md0
Password:
/dev/md0:
       Version : 00.90.03
 Creation Time : Wed Sep 13 22:04:11 2006
    Raid Level : raid5
    Array Size : 732587712 (698.65 GiB 750.17 GB)
   Device Size : 244195904 (232.88 GiB 250.06 GB)
  Raid Devices : 4
 Total Devices : 4
Preferred Minor : 0
   Persistence : Superblock is persistent

   Update Time : Mon Oct  9 00:02:30 2006
         State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
 Spare Devices : 0

        Layout : left-symmetric
    Chunk Size : 64K

          UUID : 86770f56:8e4f51e5:fd754630:f1c65359
        Events : 0.54082

   Number   Major   Minor   RaidDevice State
      0       8        1        0      active sync   /dev/sda1
      1       8       17        1      active sync   /dev/sdb1
      2       8       33        2      active sync   /dev/sdc1
      3       8       49        3      active sync   /dev/sdd1

I really have no idea what could be causing this. Sometimes after
restart it still won't work through Samba, and I can never perform
massive local reads and writes, i.e. a recursive copy off of the raid.

On 10/11/06, Eric Sandeen <sandeen@xxxxxxxxxxx> wrote:
Ian Williamson wrote:
> I am running XFS on a software raid 5. I am doing this with a PCI
> controller with 4 SATA drives attached to it.
>
> When I play my music over the network through Samba from the raid
> volume my audio client will often loose the connection. This isn't
> remediated until I restart the machine with the raid controller or
> wait for an unknown amount of time. Either way, the problem still
> persists.
>
> Initially I though that this was Samba's fault, but I think it may be
> xfs related due to what was in /var/log/messages:
>
> Oct  9 22:37:33 ionlinux kernel: [105657.982701] Modules linked in:
> serio_raw i2c_nforce2 pcspkr forcedeth r8169 nvidia_agp agpgart
> i2c_core psmouse sg evdev xfs dm_mod sd_mod generic sata_nv ide_disk
> ehci_hcd ide_cd cdrom sata_sil ohci_hcd usbcore libata scsi_mod
> ide_generic processor
> Oct  9 22:37:33 ionlinux kernel: [105657.982985] EIP:
> 0060:[<f8a1353e>]    Not tainted VLI
> Oct  9 22:37:33 ionlinux kernel: [105657.982986] EFLAGS: 00010246
> (2.6.18 #1)

It looks like you've edited this a bit too much, what came before this in the 
logs?

Are you running on 4k stacks, out of curiosity?

-Eric



--
Ian Williamson


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