linux-kernel - Re: 2.6.21-rc4-mm1

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Date:	Thu, 22 Mar 2007 21:04:06 +1100
From:	Con Kolivas <kernel@...ivas.org>
To:	Andy Whitcroft <apw@...dowen.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Steve Fox <drfickle@...ibm.com>,
	"Martin J. Bligh" <mbligh@...igh.org>
Subject: Re: 2.6.21-rc4-mm1

On Thursday 22 March 2007 20:48, Andy Whitcroft wrote:
> Andy Whitcroft wrote:
> > Andy Whitcroft wrote:
> >> Andrew Morton wrote:
> >>> Temporarily at
> >>>
> >>>   http://userweb.kernel.org/~akpm/2.6.21-rc4-mm1/
> >>>
> >>> Will appear later at
> >>>
> >>>  
> >>> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.21-rc
> >>>4/2.6.21-rc4-mm1/
> >>
> >> [All of the below is from the pre hot-fix runs.  The very few results
> >> which are in for the hot-fix runs seem worse if anything.  :(  All
> >> results should be out on TKO.]
> >>
> >>> - Restored the RSDL CPU scheduler (a new version thereof)
> >>
> >> Unsure if the above is the culprit but there seems to be a smattering of
> >> BUG's in kernbench from the schedular on several systems, and panics
> >> which do not fully dump out.
> >>
> >> elm3b239 is about 2/4 kernbench being the test in progress when we
> >> blammo in both failed tests, elm3b234 doesn't boot at all.
> >
> > Well I have one result through for backing RSDL out on elm3b239 and that
> > does indeed seem to give us a successful boot and test.  peterz has
> > pointed me to an incremental patch from Con which I'll push through
> > testing and see if that sorts it out.
>
> Ok, tested the patch below on top of 2.6.21-rc4-mm1 and this seems to
> fix the problem:
>
> http://ck.kolivas.org/patches/staircase-deadline/2.6.21-rc4-mm1-rsdl-0.32.p
>atch
>
> Hard to tell from that patch whether it will be fixed in the changes
> already committed to the next -mm.
>
> Its possible that it may be fixed by the following patch:
>
>     sched-rsdl-improvements.patch
>
> Which has the following slipped in at the end of the changelog:
>
>     A tiny change checking for MAX_PRIO in normal_prio()
>     may prevent oopses on bootup on large SMP due to
>     forking off the idle task.
>
> Con, are all the changes in the 0.32 patch above with akpm?

Yes he's queued everything in that patch you tested for the next -mm. Thanks 
very much for testing it.

-- 
-ck
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