lkml.org 
[lkml]   [2017]   [Aug]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRE: [PATCH 1/2] x86/intel_rdt/mbm: Fix MBM overflow handler during hot cpu
On Wed, 16 Aug 2017, Luck, Tony wrote:
> > You could alternatively use flush and make the worker code schedule the
> > work on a still online CPU in the domain instead of blindly rescheduling it
> > on the same CPU.
>
> We looked at that when you suggested flush. The problem is that we have
> already deleted the current cpu from the bitmask for the domain. So the
> worker code doesn't know which domain it is running on, so can't pick
> another.
>
> If we try to do the flush before dropping the cpu from the bitmask, then
> the worker code doesn't have any reason to pick a different CPU.
>
> Is there is some cheap "I'm running on a CPU that is in the process of going
> offline" test that we could make in the worker code?

Don't think so. It was just a thought, but the code as provided is fine and
merged as is.

Thanks,

tglx

\
 
 \ /
  Last update: 2017-08-16 16:58    [W:0.107 / U:0.424 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site