On 01/15, Rik van Riel wrote: > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On 01/15/2015 02:20 PM, Oleg Nesterov wrote: > > b/arch/x86/kernel/i387.c @@ -81,9 +81,7 @@ void > > __kernel_fpu_begin(void) this_cpu_write(in_kernel_fpu, true); > > > > if (__thread_has_fpu(me)) { - __thread_clear_has_fpu(me); > > I will put that line back in the patch series that defers the > loading of FPU state until the switch to user space,
I think this needs more discussion. Firstly, __thread_clear_has_fpu() should go into __kernel_fpu_end(), it should replace restore_fpu_checking(). But does your series actually need this change? Correctness-wise this is not needed (afaics). Performance-wise I am not sure, kernel_fpu_begin() is unlikely event. Plus I am not sure this is a win (in general), but I can be easily wrong. > but I > guess we can go either way for now... Yes, this should not really conflict with your changes in any case. Given that you acked 1/3 and 3/3, perhaps you can ack this one as well? Oleg. -- 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/