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

Hans Rosenfeld
2011-12-07T19:58:22Z

Hi,

On Fri, Dec 02, 2011 at 12:20:50PM +0100, Hans Rosenfeld wrote:
> On Thu, Dec 01, 2011 at 06:01:27PM -0800, H. Peter Anvin wrote:
> > On 12/01/2011 12:36 PM, Hans Rosenfeld wrote:
> > >
> > > So I assume, if you have 10000s of processes on a legacy 32bit system
> > > that never do any FPU stuff or SSE optimizations, you might indeed waste
> > > a couple of megabytes. I don't think thats very realistic, but that's
> > > just my opinion.
> > >
> >
> > A couple of megabytes of *lowmem*...
>
> Ok, I'll rework that part, so that preallocation only happens on systems
> that support non-lazy states. That means patch #7 is going away and
> patch #8 is getting slightly bigger. This may take a few days as I have
> to test that again.

The reworked LWP patches are ready and will follow shortly. I also added
a Kconfig option to completely disable support for non-lazy states,
allowing to completely avoid preallocation of the xstate area if
required.

Did you look at the other patches already?

Hans

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