lkml.org 
[lkml]   [2010]   [Jan]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH 04/40] sched: implement __set_cpus_allowed()
From
Date
On Tue, 2010-01-19 at 10:07 +0900, Tejun Heo wrote:
>
> It's also necessary to guarantee forward progress during CPU_DOWN.
> The problem with kthread_bind() is that it's not synchronized against
> CPU hotplug operations. It needs outer synchronization like calling
> it directly from CPU_DOWN_PREP. I guess it's doable but I think it
> would be better to simply share the backend implementation between
> set_cpus_allowed_ptr() and kthread_bind().

OK, so you're saying you need to migrate the rescue thread during
cpu-down. That thread is guaranteed sleeping right, if it were not it'd
not be elegible to run on our dying cpu. Hence kthread_bind() ought to
just work, no?



\
 
 \ /
  Last update: 2010-01-19 09:39    [from the cache]
©2003-2014 Jasper Spaans. Advertise on this site