All of lore.kernel.org
 help / color / mirror / Atom feed
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 [PATCH] kmemcheck: don't track pages allocated with interrupts disabled 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

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=484AE5C9.9070306@firstfloor.org \
    --to=andi@firstfloor.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@elte.hu \
    --cc=penberg@cs.helsinki.fi \
    --cc=vegard.nossum@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.