linux-kernel - Re: [PATCH 0/4] WorkStruct: Shrink work

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Date:	Mon, 20 Nov 2006 11:32:06 -0500
From:	Trond Myklebust <trond.myklebust@....uio.no>
To:	David Howells <dhowells@...hat.com>
Cc:	torvalds@...l.org, akpm@...l.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/4] WorkStruct: Shrink work_struct by two thirds

On Mon, 2006-11-20 at 14:27 +0000, David Howells wrote:
> 
> The workqueue struct is huge, and this limits it's usefulness.  On a 64-bit
> architecture it's nearly 100 bytes in size, of which the timer_list is half.
> These patches shrink work_struct by 8 of the 12 words it ordinarily consumes.
> This is done by:
> 
>  (1) Splitting the timer out so that delayable work items are defined by a
>      separate structure which incorporates a basic work_struct and a timer.

Why not simply add a timer argument to 'queue_delayed_work()' and
'cancel_delayed_work()'? That may allow you to reuse an existing timer
struct if you already have it embedded somewhere else.

Cheers
  Trond

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