lkml.org 
[lkml]   [2018]   [Nov]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v1 2/2] x86/hyperv: make HvNotifyLongSpinWait hypercall
On Thu, Nov 01, 2018 at 11:20:21AM +0800, Yi Sun wrote:
> On 18-10-31 18:15:39, Peter Zijlstra wrote:

> > So Yi, are you actually seeing a problem? If so, can you give details?
>
> Where does the patch come from? I cannot find it through google.

What patch!? The one I posted:

https://lkml.kernel.org/r/20181031141030.GB13219@hirez.programming.kicks-ass.net

I made that up real quick.

> Per Waiman's comment, it seems not suitable to call vcpu_is_preempted()
> in pv_wait_head_or_lock(). So, we cannot make HvSpinWaitInfo notification
> through vcpu_is_preempted() for such case. Based on that, I suggest to
> add one more callback function in pv_lock_ops.

We're not doing anything until you can show a problem. If it ain't
broken, don't fix it etc..

> BTW, which performance test do you suggest? I am trying to test it by
> AIM7.

Waiman?

\
 
 \ /
  Last update: 2018-11-01 10:00    [W:0.064 / U:0.116 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site