From: "H. Peter Anvin" <hpa@zytor.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Andi Kleen <andi@firstfloor.org>,
Shaohua Li <shaohua.li@intel.com>,
lkml <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>,
"Chen, Tim C" <tim.c.chen@intel.com>
Subject: Re: [PATCH 1/2]percpu: introduce read mostly percpu API
Date: Wed, 20 Oct 2010 14:42:12 -0700 [thread overview]
Message-ID: <4CBF6234.9090402@zytor.com> (raw)
In-Reply-To: <4CBF616E.1080501@zytor.com>
On 10/20/2010 02:38 PM, H. Peter Anvin wrote:
> On 10/20/2010 12:53 AM, Eric Dumazet wrote:
>>
>> My question was more a rethoric one. I understand for sure the intent.
>>
>> All this should be explained in changelog, so that people know
>> when/where use this new class of per_cpu variables ;)
>>
>
> Changelog really isn't the best place for this, a Documentation file
> would be better.
>
> I'm trying to grok the intended semantic of the shared_aligned section
> right now... I'm not sure if there is a significant difference between
> the read mostly and the shared aligned section?
>
>From the looks of it, it's a manual way to do what the linker would,
quite frankly, do better with SORT_BY_ALIGNMENT() -- although by
separating it out it might still be a win to avoid lots of "N+1"-sized
sections aligned to N.
-hpa
next prev parent reply other threads:[~2010-10-20 21:42 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-20 3:07 [PATCH 1/2]percpu: introduce read mostly percpu API Shaohua Li
2010-10-20 5:18 ` Eric Dumazet
2010-10-20 6:00 ` H. Peter Anvin
2010-10-20 7:35 ` Andi Kleen
2010-10-20 7:53 ` Eric Dumazet
2010-10-20 21:38 ` H. Peter Anvin
2010-10-20 21:42 ` H. Peter Anvin [this message]
2010-10-20 21:33 ` H. Peter Anvin
2010-10-20 23:06 ` [tip:x86/mm] percpu: Introduce a read-mostly " tip-bot for Shaohua Li
2010-10-21 1:38 ` Shaohua Li
2010-10-21 2:53 ` H. Peter Anvin
2010-10-21 5:33 ` Eric Dumazet
2010-10-21 5:54 ` H. Peter Anvin
2010-10-21 6:07 ` Eric Dumazet
2010-10-21 6:09 ` H. Peter Anvin
2010-10-21 6:17 ` Shaohua Li
2010-10-21 6:48 ` Eric Dumazet
2010-10-21 6:54 ` H. Peter Anvin
2010-10-21 6:10 ` H. Peter Anvin
2010-10-21 7:40 ` [tip:x86/mm] x86-32, percpu: Correct the ordering of the percpu readmostly section tip-bot for H. Peter Anvin
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=4CBF6234.9090402@zytor.com \
--to=hpa@zytor.com \
--cc=andi@firstfloor.org \
--cc=eric.dumazet@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=shaohua.li@intel.com \
--cc=tim.c.chen@intel.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.