From: Gilad Ben-Yossef <gilad@benyossef.com>
To: Christoph Lameter <cl@gentwo.org>
Cc: linux-kernel@vger.kernel.org,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Frederic Weisbecker <fweisbec@gmail.com>,
Russell King <linux@arm.linux.org.uk>,
linux-mm@kvack.org, Pekka Enberg <penberg@kernel.org>,
Matt Mackall <mpm@selenic.com>,
Sasha Levin <levinsasha928@gmail.com>
Subject: Re: [PATCH v2 4/6] mm: Only IPI CPUs to drain local pages if they exist
Date: Fri, 28 Oct 2011 10:43:31 +0200 [thread overview]
Message-ID: <CAOtvUMdjtork2uPTWWCT-bRLP2AAR+DA2_nxG-8MQe83MT=Vew@mail.gmail.com> (raw)
In-Reply-To: <alpine.DEB.2.00.1110272307110.14619@router.home>
On Fri, Oct 28, 2011 at 6:10 AM, Christoph Lameter <cl@gentwo.org> wrote:
> On Sun, 23 Oct 2011, Gilad Ben-Yossef wrote:
>
>> +/* Which CPUs have per cpu pages */
>> +cpumask_var_t cpus_with_pcp;
>> +static DEFINE_PER_CPU(unsigned long, total_cpu_pcp_count);
>
> This increases the cache footprint of a hot vm path. Is it possible to do
> the same than what you did for slub? Run a loop over all zones when
> draining to check for remaining pcp pages and build the set of cpus
> needing IPIs temporarily while draining?
>
Sounds like a good idea. I will give it a shot.
Thanks,
Gilad
--
Gilad Ben-Yossef
Chief Coffee Drinker
gilad@benyossef.com
Israel Cell: +972-52-8260388
US Cell: +1-973-8260388
http://benyossef.com
"I've seen things you people wouldn't believe. Goto statements used to
implement co-routines. I watched C structures being stored in
registers. All those moments will be lost in time... like tears in
rain... Time to die. "
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2011-10-28 8:43 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-23 15:48 [PATCH v2 0/6] Reduce cross CPU IPI interference Gilad Ben-Yossef
2011-10-23 15:48 ` [PATCH v2 1/6] smp: Introduce a generic on_each_cpu_mask function Gilad Ben-Yossef
2011-10-23 15:48 ` [PATCH v2 2/6] arm: Move arm over to generic on_each_cpu_mask Gilad Ben-Yossef
2011-10-23 15:48 ` [PATCH v2 3/6] tile: Move tile to use " Gilad Ben-Yossef
2011-10-23 15:48 ` [PATCH v2 4/6] mm: Only IPI CPUs to drain local pages if they exist Gilad Ben-Yossef
2011-10-28 4:10 ` Christoph Lameter
2011-10-28 8:42 ` Gilad Ben-Yossef
2011-10-28 8:43 ` Gilad Ben-Yossef [this message]
2011-10-23 15:48 ` [PATCH v2 5/6] slub: Only IPI CPUs that have per cpu obj to flush Gilad Ben-Yossef
2011-10-23 15:48 ` [PATCH v2 6/6] slub: only preallocate cpus_with_slabs if offstack Gilad Ben-Yossef
2011-10-24 5:19 ` Andi Kleen
2011-10-24 6:16 ` Sasha Levin
2011-10-24 8:02 ` Gilad Ben-Yossef
-- strict thread matches above, loose matches on Subject: below --
2011-10-23 15:56 [PATCH v2 0/6] Reduce cross CPU IPI interference Gilad Ben-Yossef
2011-10-23 15:56 ` [PATCH v2 4/6] mm: Only IPI CPUs to drain local pages if they exist Gilad Ben-Yossef
2011-10-28 16:07 ` Rik van Riel
2011-10-29 15:29 ` Gilad Ben-Yossef
2011-11-02 8:53 ` Christoph Lameter
2011-11-10 8:03 ` Gilad Ben-Yossef
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='CAOtvUMdjtork2uPTWWCT-bRLP2AAR+DA2_nxG-8MQe83MT=Vew@mail.gmail.com' \
--to=gilad@benyossef.com \
--cc=a.p.zijlstra@chello.nl \
--cc=cl@gentwo.org \
--cc=fweisbec@gmail.com \
--cc=levinsasha928@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux@arm.linux.org.uk \
--cc=mpm@selenic.com \
--cc=penberg@kernel.org \
/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;
as well as URLs for NNTP newsgroup(s).