From: Jeremy Fitzhardinge <jeremy@goop.org>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Andi Kleen <ak@suse.de>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Rusty Russell <rusty@rustcorp.com.au>
Subject: Re: [PATCH 2/2] Allow percpu variables to be page-aligned
Date: Tue, 10 Apr 2007 15:49:20 -0700 [thread overview]
Message-ID: <461C1470.60308@goop.org> (raw)
In-Reply-To: <m16483yinf.fsf@ebiederm.dsl.xmission.com>
Eric W. Biederman wrote:
> Jeremy Fitzhardinge <jeremy@goop.org> writes:
>
>
>> Let's allow page-alignment in general for per-cpu data (wanted by Xen, and
>> Ingo suggested KVM as well).
>>
>> Because larger alignments can use more room, we increase the max per-cpu
>> memory to 64k rather than 32k: it's getting a little tight.
>>
>
> The second paragraph of the comment is dated. You are not changing the per-cpu
> memory size at all now.
>
Yup.
> Although we should probably fail the module load if the requested alignment
> is to great, but that is just picking nits, and is no worse than what we
> do today.
>
Yes. And we barely support a module's use of page-aligned data, since
it would potentially chew through the percpu space very quickly.
J
prev parent reply other threads:[~2007-04-10 22:49 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-10 17:09 [PATCH 2/2] Allow percpu variables to be page-aligned Jeremy Fitzhardinge
2007-04-10 22:22 ` Eric W. Biederman
2007-04-10 22:49 ` Jeremy Fitzhardinge [this message]
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=461C1470.60308@goop.org \
--to=jeremy@goop.org \
--cc=ak@suse.de \
--cc=akpm@linux-foundation.org \
--cc=ebiederm@xmission.com \
--cc=linux-kernel@vger.kernel.org \
--cc=rusty@rustcorp.com.au \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox