On 04/27, Dave Hansen wrote: > > On 04/26/2015 03:04 PM, Bobby Powers wrote: > > > The functional change was that flush_thread after f893959b only calls > > restore_init_xstate when both !use_eager_fpu and !used_math are true. > > drop_init_fpu (now fpu_reset_state) calls restore_init_xstate() > > regardless of whether current used_math(). > > This is really interesting. We were seeing some issues where the xstate > was not getting cleared across an exec, which seemed silly, but we just > assumed it was something that had always been there.
This is because I am stupid. Without this Bobby's fix flush_thread() simply does nothing if a user-space task execs (if eagerfpu). 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/
