On Fri, 15 Jan 2016 16:42:22 +1100 Michael Neuling <mi...@neuling.org> wrote:
> On Fri, 2016-01-15 at 16:04 +1100, Cyril Bur wrote: > > With threads leaving the math bits enabled in their saved MSR to indicate > > that the hardware is hot and a restore is not needed, children need to turn > > it off as when they do get scheduled, there's no way their registers could > > have been hot. > > Is this a bug in the current code? > You're very consistent: https://lists.ozlabs.org/pipermail/linuxppc-dev/2015-November/136469.html ;) > Mikey > > > Signed-off-by: Cyril Bur <cyril...@gmail.com> > > --- > > arch/powerpc/kernel/process.c | 1 + > > 1 file changed, 1 insertion(+) > > > > diff --git a/arch/powerpc/kernel/process.c > > b/arch/powerpc/kernel/process.c > > index dccc87e..e0c3d2d 100644 > > --- a/arch/powerpc/kernel/process.c > > +++ b/arch/powerpc/kernel/process.c > > @@ -1307,6 +1307,7 @@ int copy_thread(unsigned long clone_flags, > > unsigned long usp, > > > > f = ret_from_fork; > > } > > + childregs->msr &= ~(MSR_FP|MSR_VEC|MSR_VSX); > > sp -= STACK_FRAME_OVERHEAD; > > > > /* _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
