Re: [GIT PULL] core block IO bits for 3.8

From: Jens Axboe
Date: Mon Dec 17 2012 - 14:07:32 EST

On 2012-12-17 18:47, Tejun Heo wrote:
> Hello, Jens.
> On Mon, Dec 17, 2012 at 06:04:42PM +0100, Jens Axboe wrote:
>> OK, if you have something generic for threadpools in mind, we can wait
>> with this one. I just thought that a "real" interface was nicer than
>> manual setting, especially since the flusher threads come and go. Then
>> you'd need some udev hook to get it set, not even sure how easy that
>> would be with the weird linkage.
> I've been thinking about this and I think what we really need is a
> generic interface for thread pools where the user can specify various
> attributes - priority, affinity and probably cgroup association, so
> that those attributes are exposed in generic manner while backend
> creates and manages worker pools identified by actual attriutes so
> that we don't end up with gazillion pools. crypto and writeback would
> be the obvious users and probably the virtio too. I'll write more
> when things get more concrete.

I agree. That part of the writeback code is pretty generic

So new course of action is to revert the commit, and then I'm sure Jeff
will re-send the code to just set the affinity to something sane by
default when that is easily doable.

Jens Axboe

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