[Xen-devel] RE: Avoid alloc for xsave before xsave_init

["Wei, Gang" <gang.wei@xxxxxxxxx>]

Keir Fraser wrote on 2011-01-14:
> On 14/01/2011 07:11, "Wei, Gang" <gang.wei@xxxxxxxxx> wrote:
> 
>>> I agree that do test-and-exit on is_idle_vcpu() in
>>> Xsave_{alloc,free}_save_area.
>>> Further, We'd better add assert(xsave_cntxt_size>=576) after the
>>> test-and-exit clause to ensure no buffer overflow will happen in the future.
>>> 
>>> I reviewed the context switch code and assure context switch code
>>> not be doing XSAVE when switching out an idle vcpu.
>> 
>> Here is the patch.
> 
> I applied your patch, plus some cleanup, as of c/s 22751.

Your cleanup looks good.

Jimmy



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