Re: oops, 2.6.15.4 + qla1280+md+xfs+quota (fwd)

[Nathan Scott <nathans@sgi.com>]

On Thu, Feb 16, 2006 at 10:30:34AM -0800, Chris Stromsoe wrote:
> I sent this to lkml yesterday.  Short description of the problem -- xfs on 
> 2.6.15.4 without quota enabled is ok.  When I try to mount with "quota", 
> the entire machine hangs.  Details are below.

Could you try without 4Kstacks just for grins?  Thanks.
There was a stack abuse accidentally introduced in the XFS
quota mount path a month or two back - I have a fix for that
pending so that may just be it.

EIP is at a whacky spot, and your stack trace is all messed
up - not sure how we'd get into that situation on a mount with
quotas, unless something really bizzare happened (like a stack
overflow).

cheers.

> ---------- Forwarded message ----------
> Date: Thu, 16 Feb 2006 03:10:00 -0800 (PST)
> From: Chris Stromsoe <cbs@cts.ucla.edu>
> To: linux-kernel@vger.kernel.org
> Subject: oops, 2.6.15.4 + qla1280+md+xfs+quota
> 
> I have a 2.6.15.4 system that was running fine.  Internal drives are using the 
> Fusion MPT driver.  I have two external JBODs with 12 disks each. Each JBOD has 
> two channels, 6 disks per channel, and each channel is connected to a QLogic 
> ISP 10160 controller.
> 
> Each of the JBODs is built as an md raid5 (md1 and md2).  Both raid5s are 
> mirrored (md3).  I had an ext3 filesystem running fine.
> 
> I unmounted md3, ran "mkfs.xfs /dev/md3 && mount /dev/md3" and the system hung. 
> md is built in, qla1280 and xfs are both modules.  mount options in fstab are 
> rw, quota, noatime -- possibly also noexec and nosuid, but I don't think they 
> were enabled.  XFS is built with XFS quota support; I've tried also with and 
> without generic quota support.  4K stacks are enabled, if that matters.  Full 
> .config and dmesg output are at http://hashbrown.cts.ucla.edu/pub/oops-200602/ 
> (config is with generic quota, dmesg has xfs loaded as a module and /dev/md3 
> mounted without quota set).
> 
> I added "defaults" and removed "quota" from fstab for /dev/md3 and was able to 
> mount the partition normally.
> 
> It's not responsive to sysrq on the serial console. The last output (without 
> generic quota) was:
> 
> XFS mounting filesystem md3
> XFS quotacheck md3: Please wait.
> Unable to handle kernel paging request at virtual address 00100178
>   printing eip:
> c0114f5a
> *pde = 00000000
> Oops: 0000 [#1]
> SMP
> Modules linked in: xfs e1000 bonding qla1280 st
> CPU:    0
> EIP:    0060:[<c0114f5a>]    Not tainted VLI
> EFLAGS: 00010006   (2.6.15.4)
> EIP is at do_page_fault+0x93/0x545
> eax: eb7ac000   ebx: 00000001   ecx: 0000007b   edx: 00100100
> esi: 000001ff   edi: c0114ec7   ebp: eb7ac0e8   esp: eb7ac094
> ds: 007b   es: 007b   ss: 0068
> Unable to handle kernel paging request at virtual address 00100178
>   printing eip:
> Unable to handle kernel paging request at virtual address 00100178
>   printing eip:
> Unable to handle kernel NULL pointer dereference at virtual address 00000078
>   printing eip:
> Unable to handle kernel paging request at virtual address 00100178
>   printing eip:
> Unable to handle kernel paging request at virtual address 00100178
>   printing eip:
> Unable to handle kernel paging request at virtual address 00100178
>   printing eip:
> Unable to handle kernel paging request at virtual address bebaee76
>   printing eip:
> Unable to handle kernel paging request at virtual address 00100178
>   printing eip:
> Unable to handle kernel paging request at virtual address bebaee76
>   printing eip:
> Unable to handle kernel paging request at virtual address 00100178
>   printing eip:
> Unable to handle kernel paging request at virtual address 00100178
>   printing eip:
> Unable to handle kernel paging request at virtual address 00100178
>   printing eip:
> Unable to handle kernel paging request at virtual address 00100178
>   printing eip:
> Unable to handle kernel paging request at virtual address 00100178
>   printing eip:
> Unable to handle kernel paging request at virtual address 00100178
>   printing eip:
> Unable to handle kernel paging request at virtual address 00100178
>   printing eip:
> 
> 
> As soon as I mount the partition with quota in fstab, the machine hangs. The 
> oops is not always the same.  During one test run, I saw a number of "BUG: soft 
> lockup detected on CPU#0" errors.  The above oops is the only one I managed to 
> capture.
> 
> 
> 
> -Chris
> -
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> 

-- 
Nathan
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