Re: [PATCH v5] x86/msr: Add write msr notrace to avoid the debug codes splash

2016-10-26 Thread Wanpeng Li
2016-10-26 19:50 GMT+08:00 Borislav Petkov : > On Wed, Oct 26, 2016 at 07:35:26PM +0800, Wanpeng Li wrote: >> From: Wanpeng Li >> >> As Peterz pointed out: >> >> | The thing is, many many smp_reschedule_interrupt() invocations don't >> | actually execute anything much at all and are only send to t

Re: [PATCH v5] x86/msr: Add write msr notrace to avoid the debug codes splash

2016-10-26 Thread Borislav Petkov
On Wed, Oct 26, 2016 at 07:35:26PM +0800, Wanpeng Li wrote: > From: Wanpeng Li > > As Peterz pointed out: > > | The thing is, many many smp_reschedule_interrupt() invocations don't > | actually execute anything much at all and are only send to tickle the > | return to user path (which does the a

Re: [PATCH v5] x86/msr: Add write msr notrace to avoid the debug codes splash

2016-10-26 Thread Paolo Bonzini
On 26/10/2016 13:35, Wanpeng Li wrote: > From: Wanpeng Li > > As Peterz pointed out: > > | The thing is, many many smp_reschedule_interrupt() invocations don't > | actually execute anything much at all and are only send to tickle the > | return to user path (which does the actual preemption).

[PATCH v5] x86/msr: Add write msr notrace to avoid the debug codes splash

2016-10-26 Thread Wanpeng Li
From: Wanpeng Li As Peterz pointed out: | The thing is, many many smp_reschedule_interrupt() invocations don't | actually execute anything much at all and are only send to tickle the | return to user path (which does the actual preemption). This patch add write msr notrace to avoid the debug co