linux-kernel - Re: [PATCH] modules: Take a shortcut for checking if an address is in a module

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Date:	Wed, 11 Jun 2008 21:12:08 +1000
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	mingo@...e.hu, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] modules: Take a shortcut for checking if an address is in a module

On Wednesday 11 June 2008 06:05:19 Arjan van de Ven wrote:
> From: Arjan van de Ven <arjan@...ux.intel.com>
> Subject: [PATCH] modules: Take a shortcut for checking if an address is in
> a module
>
> Various pieces of the kernel (lockdep, latencytop, etc) tend to store
> backtraces, sometimes at a relatively high frequency. In itself this
> isn't a big performance deal (after all you're using diagnostics features),
> but there have been some complaints from people who have over 100 modules
> loaded that this is a tad too slow.

Nothing wrong with the idea, but how about a nice arch_maybe_module_addr() 
macro rather than ifdefs in module.c?

Thanks,
Rusty.
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