On 05/26/2014 10:01 AM, Fenghua Yu wrote: > From: Fenghua Yu <fenghua...@intel.com> > > With ever growing extended state registers (xstate) on x86 processors, kernel > needs to cope with issue of growing memory space occupied by xstate. The xsave > area is holding more and more xstate registers, growing from legacy FP and > SSE to AVX, AVX2, AVX-512, MPX, and Intel PT. > > The recently introduced compacted format of xsave area saves xstates only > for enabled states. This patch set saves the xsave area space per process > in compacted format by xsaves/xrstors instructions.
Are we going to want to encourage userspace to do something like sticking vzeroupper right before each syscall to make any xsaves/xrestores faster? --Andy -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
