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 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.