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From: Andi Kleen <andi@firstfloor.org>
To: Vegard Nossum <vegard.nossum@gmail.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>,
	Ingo Molnar <mingo@elte.hu>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH] kmemcheck: don't track pages allocated with interrupts disabled
Date: Sat, 07 Jun 2008 21:47:21 +0200	[thread overview]
Message-ID: <484AE5C9.9070306@firstfloor.org> (raw)
In-Reply-To: <19f34abd0806071115s3e50d662p190a65fa2f091c7b@mail.gmail.com>


> Maybe we can do the splitting when kmemcheck is enabled for the first
> time, either with the proc handler or at boot if kmemcheck=1 is passed
> on the command line. Both of these contexts should/can be
> !irqs_disabled(), I think.

You could always split at boot when the CONFIG is enabled. I assume the
CONFIG alone has already quite a lot of overhead and it will be only
on in debug kernels and adding some more TLB misses shouldn't be really
a problem. Using 2MB pages in kernel is merely  an optimization.

-Andi



  reply	other threads:[~2008-06-07 19:47 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-06-07 14:32 Vegard Nossum
2008-06-07 17:12 ` Andi Kleen
2008-06-07 18:15   ` Vegard Nossum
2008-06-07 19:47     ` Andi Kleen [this message]
2008-06-07 20:19       ` Vegard Nossum
2008-06-07 18:18   ` Vegard Nossum

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