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Re: raid5 resync aborted under heavy XFS use

To: Steve Lord <lord@xxxxxxx>
Subject: Re: raid5 resync aborted under heavy XFS use
From: Matt Ryan <matt@xxxxxxxxxxxxxxxx>
Date: Wed, 01 Aug 2001 21:03:02 -0700
Cc: Linux XFS Mailing List <linux-xfs@xxxxxxxxxxx>
References: <200107301351.f6UDp6J04035@jen.americas.sgi.com>
Sender: owner-linux-xfs@xxxxxxxxxxx
hi -

>  o There was a stall problem where the raid would just grind to a halt,
>    this was fixed by a kernel change in the 2.4.7-pre series. This was

sorry to beat a dead horse, but I have a couple questions related to
this and the fact that I might have to go with the redhat-based 2.4.3
1.0.1 release kernel on a couple of machines.

- what was the fix to the 'grind to a halt' problem?  was it a patch
against the md code in particular, or some other part of the kernel?

- does anybody know if this same problem existed in the redhat 1.0.1
kernel?  I don't know how much rigorous testing that kernel has been
subjected to.  is there a specific test that triggered this problem in
the stock + xfs kernel that I could run on the redhat kernel?

- if this problem does turn out to be in the redhat 1.0.1 kernel, and
there is a specific, simple patch that fixes it, my next step would be
to figure out if it has any chance of working with the 2.4.3 -ac
kernel.  I wonder what my chances of that would be.


thanks,
Matt


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