Re: [PATCH 0/9] rework of extended state handling, LWP support

Hans Rosenfeld
2011-11-30T17:38:01Z

On Tue, Nov 29, 2011 at 01:31:09PM -0800, Andi Kleen wrote:
> Hans Rosenfeld <hans.rosenfeld@amd.com> writes:
> >
> > The lazy allocation of the xstate area has been removed. The support for
> > extended states that cannot be saved/restored lazily, like AMD's LWP,
> > need this. Since optimized library functions using SSE etc. are widely
> > used today, most processes would have an xstate area anyway, making the
> > memory overhead negligible.
>
> Do you have any data on that? It sounds dubious for specialized
> workloads.

What kind of specialized workload do you mean?

Hans

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