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Re: Regression- XFS won't mount on partitioned md array

To: David Greaves <david@xxxxxxxxxxxx>
Subject: Re: Regression- XFS won't mount on partitioned md array
From: Eric Sandeen <sandeen@xxxxxxxxxxx>
Date: Fri, 16 May 2008 13:59:13 -0500
Cc: David Chinner <dgc@xxxxxxx>, LinuxRaid <linux-raid@xxxxxxxxxxxxxxx>, xfs@xxxxxxxxxxx, "'linux-kernel@xxxxxxxxxxxxxxx'" <linux-kernel@xxxxxxxxxxxxxxx>
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David Greaves wrote:
> I just attempted a kernel upgrade from 2.6.20.7 to 2.6.25.3 and it no longer
> mounts my xfs filesystem.
> 
> I bisected it to around
> a67d7c5f5d25d0b13a4dfb182697135b014fa478
> [XFS] Move platform specific mount option parse out of core XFS code

around that... not exactly?  That commit should have been largely a code
move, which is not to say that it can't contain a bug... :)

> I have a RAID5 array with partitions:
> 
> Partition Table for /dev/md_d0
> 
>                First       Last
>  # Type       Sector      Sector   Offset    Length   Filesystem Type (ID) 
> Flag
> -- ------- ----------- ----------- ------ ----------- -------------------- 
> ----
>  1 Primary           0  2500288279      4  2500288280 Linux (83)           
> None
>  2 Primary  2500288280  2500483583      0      195304 Non-FS data (DA)     
> None
> 
> 
> when I attempt to mount /media:
> /dev/md_d0p1 /media xfs 
> rw,nobarrier,noatime,logdev=/dev/md_d0p2,allocsize=512m 0 0

mythbox?  :)

Hm, so it's the external log size that it doesn't much like...

> I get:
>  md_d0: p1 p2
> XFS mounting filesystem md_d0p1
> attempt to access beyond end of device
> md_d0p2: rw=0, want=195311, limit=195304

what does /proc/partitions say about md_d0p1 and p2?  Is it different
between the older & newer kernel?

What does xfs_info /mount/point say about the filesystem when you mount
it under the older kernel?  Or... if you can't mount it,

xfs_db -r -c "sb 0" -c p /dev/md_d0p1

-Eric


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