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RE: [Xen-devel] [Fwd: stack overflow "cause" found]

To: "Rik van Riel" <riel@xxxxxxxxxx>, "Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>
Subject: RE: [Xen-devel] [Fwd: stack overflow "cause" found]
From: "Nakajima, Jun" <jun.nakajima@xxxxxxxxx>
Date: Wed, 26 Jul 2006 15:29:40 -0700
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Thread-topic: [Xen-devel] [Fwd: stack overflow "cause" found]
Rik van Riel wrote:
> Ian Pratt wrote:
>>>> Xen really should not be doing this.  We could either uninline
>>>> some of these functions, or try gcc -O2 or gcc -Os.
>>> OK, with -Os it doesn't quite build due to the built-ins not being
>>> inlined.  With -O2 the stack usage changes dramatically...
>> It would be nice if -O2 worked. Quite a scary change give the amount
>> of inline asm  though... 
> Not only does -O2 seem to work, but without it we get stack
> overflows and things suddenly stop working.
> I've been beating up my x86-64 system with a few VT and paravirt
> guests for over an hour now, and it no longer crashes.  Without
> -O2, I can make it crash within minutes...

Good news. We've been doing stress testings, and haven't seen major
problems so far.

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