lkml.org 
[lkml]   [2021]   [Jan]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Question on migrate_disabe/enable()
On Tue, Jan 26, 2021 at 02:12:45AM +0000, Zhang, Qiang wrote:
> Hello Peterz, tglx
>
> I have some questions about migrate_disabe/enable(), in the past
> migrate_disabe/enable() is replaced by preempt_disable/enable() in no
> RT system.
>
> And now migrate_disabe/enable() has its own implementation, I want to
> know in migrate_disabe/enable() critical area is blocking allowed?

Yes, obviously. Otherwise it would've been preempt_disable().

> If allowed, There's a blockage in migrate_disabe/enable() critical
> area, and this time if CPU going offline,offline time will be longer.
> Is this normal phenomenon?

Ofcourse.

\
 
 \ /
  Last update: 2021-01-26 19:06    [W:0.023 / U:24.016 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site