On Mon, 29 May 2006, David Xu wrote:
On Sunday 28 May 2006 21:58, Bruce Evans wrote:
OK if it is correct to not copy the environment.
I will revert changes, I think I should keep it safe as before.
Thanks.
I couldn't find any more details about this using google.
... old CPUs (at least amd64 ones) that don't support mxcsr_mask
also don't support DAZ, so the correct mask for them is 0xFFBF. These
complications are implemented in Linux's i386 so I suppose they are
no-ops at worst for non-amd64 CPUs. Linux stores the mask in a global
variable. I think this breaks the asymmetric SMP case more than
necessary.
process migrates from one CPU to another, I don't think you can use such
CPUs in same system if they are different in this case.
Only actually using DAZ is sure not to work.
I haven't tried DAZ bit, will you fix it ?
No, not in -current, sorry. I'll check your fix for it.
Bruce
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