Re: [PATCH][1/1] Per-priority statistics for CFQ w/iopriorities 2.6.8.1

From: Shailabh Nagar
Date: Thu Sep 30 2004 - 09:48:17 EST


Jens Axboe wrote:

On Thu, Sep 30 2004, Shailabh Nagar wrote:

Jens Axboe wrote:

Hi,

Missed this patch the first time over (thank you lwn :-) - why are you
using atomic counters? In all the paths you set them, you already have
the queue lock.


Thats right, there's no need for them. I used these instinctively....
Will fix in next version, unless (hint, hint) you're taking a look at adding priorities back to mainline's CFQ.


It will never be for the mainline cfq, that is a dead code base. -mm has
a first stab at a cfq v2 with persistent io contexts, the priority based
code will go on top of that.


Great. In CKRM, we'll switch to using -mm's cfq then.

-- Shailabh
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