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Re: raid5 resync aborted under heavy XFS use

To: Seth Mos <knuffie@xxxxxxxxx>
Subject: Re: raid5 resync aborted under heavy XFS use
From: Matt Ryan <matt@xxxxxxxxxxxxxxxx>
Date: Thu, 02 Aug 2001 10:40:24 -0700
Cc: Linux XFS Mailing List <linux-xfs@xxxxxxxxxxx>
References: <200107301351.f6UDp6J04035@xxxxxxxxxxxxxxxxxxxx> <4.3.2.7.2.20010802090925.033e7dd8@xxxxxxxxxxxxx>
Sender: owner-linux-xfs@xxxxxxxxxxx
Seth Mos wrote:
> > >  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
> >
> >- 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?
> 
> You would have to scour the archive for the TAKE messages of the past week.
> You can then see what files have been touched and fetch diffs from the
> webcvs frontend.

sort of... as Steve said it was fixed by a 'kernel change', all this
would amount to on the XFS list is a TAKE to sync with the latest
2.4.7-pre.  I just found this in the 2.4.7 changelog: 

-pre5:
  ...
 - Neil Brown: raid5 stall fix, nfsd filehandle sanity check fix

that looks promising... I'll see what I can do with it.


> >- does anybody know if this same problem existed in the redhat 1.0.1
> 
> RedHat never released a 1.0.1 (was that mothersday?).

heh.  just trying to use shorthand.  I did earlier refer to it as the
'redhat-based 2.4.3 1.0.1 release kernel.'


> They are beating on a 2.4.7 based tree. No exact plans or release dates for
> 1.0.2 yet.
> The chances of patching a -ac kernel are slimm ;)

that I'm well aware of - I've seen the requests for an -ac merge come in
about once a month, and I understand how much extra work that would be. 
which is why I was hoping to extract that one fix.  Since it looks like
the patch might be isolated to the md code, I think I have a good chance
of being able to apply it to the redhat-based kernel.

thanks,
Matt


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