lkml.org 
[lkml]   [2006]   [Oct]   [22]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
DateSat, 21 Oct 2006 21:54:36 -0700
FromPaul Jackson <>
SubjectRe: [RFC] cpuset: add interface to isolated cpus
Nick wrote:
> Well, it was supposed to be used for sched-domains partitioning, and
> its uselessness for anything else I guess is what threw me.

The use of cpu_exclusive for sched domain partitioning was added
later, by a patch from Dinikar, in April or May of 2005.

In hindsight, I think I made a mistake in agreeing to, and probably
encouraging, this particular overloading of cpu_exclusive.  I had
difficulty adequately understanding what was going on.
Granted, as we've noted elsewhere on this thread, the cpu_exclusive
flag is underutilized.  It gives cpusets so marked a certain limited
exclusivity to its cpus, relative to its siblings, but it doesn't do
much else, other than this controversial partitioning of sched domains.

There may well be a useful role for the cpu_exclusive flag in managing
sched domains and partitioning.  The current role is flawed, in my view.

-- 
                  I won't rest till it's the best ...
                  Programmer, Linux Scalability
                  Paul Jackson <pj@sgi.com> 1.925.600.0401
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-10-22 06:57    [from the cache]
©2003-2008