From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Date: Fri, 26 Jan 2007 21:05:28 +0000
Subject: Re: kernel BUG at arch/sparc64/mm/fault.c:413!
Message-Id: <20070126.130528.130236097.davem@davemloft.net>
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References: <Pine.LNX.4.64.0701181328230.8124@pianoman.cluster.toy>
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To: sparclinux@vger.kernel.org

From: Vince Weaver <vince@deater.net>
Date: Fri, 26 Jan 2007 14:44:44 -0500 (EST)

> 
> > Vince, I think I figured out what the bug is, can you test the
> > following patch?  If we set %g5 with the fault address here, we have
> > to set %g4 too.  This allows to correctly handle a DTLB-PROT trap for
> > a window spill during trap entry for another top-level fault.  The
> > non-Niagara DTLB-PROT code does this properly, it's just the sun4v
> > side that had the bug.
> 
> Great news!  This fixes things.  The gcc snapshot has been compiling now 
> for over an hour without a problem, wheras before the bug would appear 
> within seconds.
> 
> Thanks for fixing this,

Awesome, thanks for testing.