On Sat, Apr 18, 2009 at 05:40:21PM +0200, Ingo van Lil wrote:
> some time ago Jeff prepared a patch [1] for UML to stop saving the
> process FP state between task switches. The assumption was that since
> with SKAS0 every guest process runs inside a host process context the
> host OS will take care of keeping the proper FP state. Unfortunately
> this is not true for multi-threaded applications, where all guest
> threads share a single host process context yet all may use the FPU on
> their own. Although I haven't verified it I suspect things to be even
> worse in SKAS3 mode where all guest processes run inside a single host
> process.
This seems plausible. Does reverting the patch fix any process crashes?
Jeff
--
Work email - jdike at linux dot intel dot com
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