linux-kernel - Re: Don't apply 9f022e54b8ea82d1ecdf3bd78d9ab9f44d6b0655 to stable please.

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Message-ID: <1333410186.1270.92.camel@sbsiddha-desk.sc.intel.com>
Date:	Mon, 02 Apr 2012 16:43:05 -0700
From:	Suresh Siddha <suresh.b.siddha@...el.com>
To:	Greg KH <gregkh@...uxfoundation.org>
Cc:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	linux-kernel@...r.kernel.org, mingo@...e.hu, stable@...r.kernel.org
Subject: Re: Don't apply 9f022e54b8ea82d1ecdf3bd78d9ab9f44d6b0655 to stable
 please.

On Mon, 2012-04-02 at 16:27 -0700, Greg KH wrote:
> On Mon, Apr 02, 2012 at 06:47:02PM -0400, Konrad Rzeszutek Wilk wrote:
> > Hey Greg,
> > 
> > The git commit 9f022e54b8ea82d1ecdf3bd78d9ab9f44d6b0655 has CC stable@...nel.org
> > but it breaks Xen - we are working to fix it in 3.4, but the fix for it
> > does some architectual changes (136d249ef7dbf0fefa292082cc40be1ea864cbd6) that
> > I don't know if you are comfortable putting in stable tree.
> > 
> 
> I have no idea what that git commit id referrs to, as it's not in
> Linus's tree at the moment.
> 
> Care to give me a subject?  diffstat?  Some kind of hint?

Greg, Konrad is referring to:

commit 73d63d038ee9f769f5e5b46792d227fe20e442c5
Author: Suresh Siddha <suresh.b.siddha@...el.com>
Date:   Mon Mar 12 11:36:33 2012 -0700

    x86/ioapic: Add register level checks to detect bogus io-apic entries

With out this commit, if the bios lists bogus io-apic's, then we will
see some error messages ("Unable to reset IRR for apic")during linux
boot which are benign. But as this patch breaks Xen, I am ok if these
don't get applied to 'stable'. Also I think it is Ingo who added the
'stable' tag. Ingo, are you ok with this?

For the mainline, we have queued more patches to fix the Xen breakage.

thanks,
suresh

> 
> And note, you forgot to send this to the stable@...r.kernel.org list,
> where the other stable kernel maintainers live, please do so next time.
> 
> thanks,
> 
> greg k-h


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