From: Daniel Phillips <phillips@phunq.net>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, peterz@infradead.org
Subject: Re: [RFC] [PATCH] A clean approach to writeout throttling
Date: Thu, 6 Dec 2007 13:27:59 -0800 [thread overview]
Message-ID: <200712061328.00247.phillips@phunq.net> (raw)
In-Reply-To: <20071206122701.85627fb4.akpm@linux-foundation.org>
On Thursday 06 December 2007 12:27, Andrew Morton wrote:
> On Thu, 6 Dec 2007 12:04:14 -0800
>
> Daniel Phillips <phillips@phunq.net> wrote:
> > Any idea
> > how to extend the accounting idea to all tasks involved in a
> > particular block device stack?
>
> SMOP, I'd have thought.
Agreed, which I realized as soon as the post was one minute old. Sure,
each helper for the device registers as a helper which puts a pointer
in the task struct, which points to the accounting info so only one new
field in task struct. The more I ponder, the more doable it seems.
> As long as each piece of code which handles
> data for this stack knows that it's handling data for that stack it
> should be able to account its memory allocations.
Don't forget that we do not actually have a usable notion of "block
device stack" yet. Perhaps you are just assuming that is
easy/imminent?
> The tricky part will be networking allocations because a NIC can of
> course handle data for all sorts of consumers. But I expect this can
> be greatly simplified with a few heuristics - work out how much
> memory your typical networking stack will allocate for a frame and
> tack that onto the total. Couple of pages worst case..
Actually, the same pattern that Peter and I developed for handling
network deadlock extends to this accounting concept. As you say, it's
a SMOP.
Daniel
next prev parent reply other threads:[~2007-12-06 21:28 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-06 0:03 [RFC] [PATCH] A clean approach to writeout throttling Daniel Phillips
2007-12-06 1:24 ` Andrew Morton
2007-12-06 6:21 ` Daniel Phillips
2007-12-06 7:31 ` Andrew Morton
2007-12-06 9:48 ` Daniel Phillips
2007-12-06 11:55 ` Andrew Morton
2007-12-06 15:52 ` Rik van Riel
2007-12-06 17:34 ` Andrew Morton
2007-12-06 17:48 ` Rik van Riel
2007-12-06 20:04 ` Daniel Phillips
2007-12-06 20:27 ` Andrew Morton
2007-12-06 21:27 ` Daniel Phillips [this message]
2007-12-06 21:53 ` Bill Davidsen
2007-12-07 0:04 ` Daniel Phillips
2007-12-07 0:29 ` Andrew Morton
2007-12-07 7:13 ` Daniel Phillips
2007-12-10 9:20 ` Daniel Phillips
2007-12-10 10:47 ` Jens Axboe
2007-12-10 11:23 ` [RFC] [PATCH] A clean aEvgeniy pproach " Daniel Phillips
2007-12-10 11:41 ` Jens Axboe
2007-12-10 12:13 ` Daniel Phillips
2007-12-10 12:16 ` Jens Axboe
2007-12-10 12:27 ` Daniel Phillips
2007-12-10 12:32 ` Jens Axboe
2007-12-10 13:04 ` Daniel Phillips
2007-12-10 13:19 ` Jens Axboe
2007-12-10 13:26 ` Daniel Phillips
2007-12-10 13:30 ` Jens Axboe
2007-12-10 13:43 ` Daniel Phillips
2007-12-10 13:53 ` Jens Axboe
2007-12-10 14:17 ` Daniel Phillips
2007-12-11 13:15 ` Jens Axboe
2007-12-11 19:38 ` Daniel Phillips
2007-12-11 20:01 ` Jens Axboe
2007-12-11 20:11 ` Daniel Phillips
2007-12-11 20:07 ` Daniel Phillips
2007-12-10 11:33 ` [RFC] [PATCH] A clean approach " Daniel Phillips
2007-12-10 21:31 ` Jonathan Corbet
2007-12-10 22:06 ` Pekka Enberg
2007-12-11 4:21 ` Daniel Phillips
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