linux-kernel - Re: [RFC PATCH 0/6] module, kbuild: Faster boot with custom kernel.

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Message-ID: <ac3eb2510902230842n278503a7w33d5ac2e622ec711@mail.gmail.com>
Date:	Mon, 23 Feb 2009 17:42:28 +0100
From:	Kay Sievers <kay.sievers@...y.org>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	Andreas Robinson <andr345@...il.com>, sam@...nborg.org,
	linux-kernel@...r.kernel.org,
	Jon Masters <jonathan@...masters.org>,
	heiko.carstens@...ibm.com
Subject: Re: [RFC PATCH 0/6] module, kbuild: Faster boot with custom kernel.

On Fri, Feb 20, 2009 at 12:32, Rusty Russell <rusty@...tcorp.com.au> wrote:
> On Friday 20 February 2009 11:28:55 Rusty Russell wrote:
>> +     /* Unlink carefully: kallsyms could be walking list. */
>> +     __list_del(&mod->list);
>> +     synchronize_sched();
>
> That should be list_del_rcu() of course.

Rusty,
are you taking care, that this patch gets merged somewhere, and shows
up in -next?

I still get a ~10% improvement without the mutex, and traces show some
parallelism from different modprobe processes. Any idea how to safely
minimize the time we need to hold it?

Thanks,
Kay
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