linux-kernel - Re: [PATCH] Execute tasklets in the same order they were queued

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Message-Id: <20080212135558.d22a843a.akpm@linux-foundation.org>
Date:	Tue, 12 Feb 2008 13:55:58 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Olof Johansson <olof@...om.net>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Execute tasklets in the same order they were queued

On Mon, 11 Feb 2008 16:28:13 -0600
Olof Johansson <olof@...om.net> wrote:

> I noticed this when looking at an openswan issue. Openswan (ab?)uses
> the tasklet API to defer processing of packets in some situations,
> with one packet per tasklet_action(). I started noticing sequences of
> reverse-ordered sequence numbers coming over the wire, since new tasklets
> are always queued at the head of the list but processed sequentially.
> 
> Convert it to instead append new entries to the tail of the list. As an
> extra bonus, the splicing code in takeover_tasklets() no longer has to
> iterate over the list.

kernel/softirq.c: In function 'takeover_tasklets':
kernel/softirq.c:597: error: 'struct tasklet_head' has no member named 'next'
kernel/softirq.c:603: error: 'struct tasklet_head' has no member named 'next'
kernel/softirq.c:588: warning: unused variable 'i'
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