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From: Rusty Russell <rusty@rustcorp.com.au>
To: Arjan van de Ven <arjan@infradead.org>
Cc: mingo@elte.hu, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] modules: Take a shortcut for checking if an address is in a module
Date: Wed, 11 Jun 2008 21:12:08 +1000	[thread overview]
Message-ID: <200806112112.08623.rusty@rustcorp.com.au> (raw)
In-Reply-To: <20080610130519.21bc66f3@infradead.org>

On Wednesday 11 June 2008 06:05:19 Arjan van de Ven wrote:
> From: Arjan van de Ven <arjan@linux.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.

  reply	other threads:[~2008-06-11 11:12 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-06-10 20:05 [PATCH] modules: Take a shortcut for checking if an address is in a module Arjan van de Ven
2008-06-11 11:12 ` Rusty Russell [this message]
2008-06-11 15:18   ` Arjan van de Ven
2008-06-11 18:54     ` Vegard Nossum
2008-06-18  9:57       ` Ingo Molnar
2008-06-18 10:24         ` Peter Zijlstra
2008-06-18 12:27           ` Rusty Russell
2008-06-12  0:20     ` Rusty Russell
2008-06-26  5:46       ` Rusty Russell
2008-06-26 11:48         ` Ingo Molnar
2008-06-18 10:00     ` Ingo Molnar

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