* Ingo Molnar <[email protected]> wrote:
> From: Dave Hansen <[email protected]>
>
> The FPU rewrite removed the dynamic allocations of 'struct fpu'.
> But, this potentially wastes massive amounts of memory (2k per
> task on systems that do not have AVX-512 for instance).
>
> Instead of having a separate slab, this patch just appends the
> space that we need to the 'task_struct' which we dynamically
> allocate already. This saves from doing an extra slab
> allocation at fork().
>
> The only real downside here is that we have to stick everything
> and the end of the task_struct. But, I think the BUILD_BUG_ON()s
> I stuck in there should keep that from being too fragile.
>
> Cc: Andy Lutomirski <[email protected]>
> Cc: Borislav Petkov <[email protected]>
> Cc: H. Peter Anvin <[email protected]>
> Cc: Linus Torvalds <[email protected]>
> Cc: Peter Zijlstra <[email protected]>
> Cc: Thomas Gleixner <[email protected]>
> Cc: [email protected]
> Link: http://lkml.kernel.org/r/[email protected]
> Signed-off-by: Ingo Molnar <[email protected]>
Dave, can I put your Signed-off-by into this patch? I have already tested these
two patches and they are looking good here - so unless you can see some
breakage
or other problem I'd prefer it to keep it two patches.
Thanks,
Ingo
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