On Mon, 2006-05-08 at 01:29 -0500, Nathan Lynch wrote:
> Shaohua Li wrote:
> > CPU hotremove will migrate tasks and redirect interrupts off dead cpu.
> > To remove multiple CPUs, we should iteratively do single cpu removal.
> > If tasks and interrupts are migrated to a cpu which will be soon
> > removed, then we will trash tasks and interrupts again. The following
> > patches allow remove several cpus one time. It's fast and avoids
> > unnecessary repeated trash tasks and interrupts. This will help NUMA
> > style hardware removal and SMP suspend/resume. Comments and suggestions
> > are appreciated.
>
> Some quantification of the benefits of adding this complexity would be
> appreciated. Like, how long does it take to offline all the cpus in a
> node serially, and how much faster is the bulk method?
This depends on the workload and I haven't a data at hand, sorry. Fast
(less tasks/timers/softirqs migration) is one benefit. The method also
means less time in stop_machine_run and less interrupt redirection, so
smaller impact to the whole system.
Thanks,
Shaohua
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
