Re: [PATCH 4/8] powerpc: Explicitly disable math features when copying thread

2015-11-22 Thread Cyril Bur
On Mon, 23 Nov 2015 12:08:38 +1100 Michael Neuling wrote: > On Wed, 2015-11-18 at 14:26 +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

Re: [PATCH 4/8] powerpc: Explicitly disable math features when copying thread

2015-11-22 Thread Michael Neuling
On Wed, 2015-11-18 at 14:26 +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 bee

[PATCH 4/8] powerpc: Explicitly disable math features when copying thread

2015-11-17 Thread Cyril Bur
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. Signed-off-by: Cyril Bur --- arch/powerpc/kernel/process