Re: [RFC] [PATCH] sysctl for the latecomers

From: Frederik Deweerdt
Date: Tue Aug 01 2006 - 11:23:08 EST

On Tue, Aug 01, 2006 at 10:49:20AM -0400, Amit Gud wrote:
> /etc/sysctl.conf values are of no use to kernel modules that are inserted
> after init scripts call sysctl for the values in /etc/sysctl.conf
> For modules to use the values stored in the file /etc/sysctl.conf, sysctl
> kernel code can keep record of 'limited' values, for sysctl entries which
> haven't been registered yet. During registration, sysctl code can check
> against the stored values and call the appropriate strategy and proc_handler
> routines if a match is found.
> Attached patch does just that. This patch is NOT tested and is just to get
> opinions, if something like this is a right way of addressing this problem.

One strange behaviour that comes to mind is the following:
1. I boot my machine so that it doesn't load module X
2. I modify /etc/sysctl.conf and I remove a line affecting module X
3. I modprobe X

Wouldn't the fact that the sysctl directive is applied anyway be a bit

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