From: Peter Zijlstra <peterz@infradead.org>
To: Christoph Lameter <clameter@sgi.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
"Luck, Tony" <tony.luck@intel.com>,
linux-arch@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: What if a TLB flush needed to sleep?
Date: Thu, 27 Mar 2008 14:20:52 +0100 [thread overview]
Message-ID: <1206624052.8514.570.camel@twins> (raw)
In-Reply-To: <Pine.LNX.4.64.0803261817110.1115@schroedinger.engr.sgi.com>
On Wed, 2008-03-26 at 18:19 -0700, Christoph Lameter wrote:
> On Wed, 26 Mar 2008, Thomas Gleixner wrote:
>
> > Please use a mutex, not a semaphore. semaphores should only be used
> > when you need a counting sempahore.
>
> Seems that mutexes are mainly useful for 2 processor systems since they
> do not allow concurrent read sections. We want multiple processors able
> to reclaim pages within the same vma or file concurrently. This means
> processors need to be able to concurrently walk potentially long lists of
> vmas.
confusion between semaphores and rwsems
--
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/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2008-03-27 13:20 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-25 20:49 Luck, Tony
2008-03-25 21:47 ` Alan Cox
2008-03-26 12:32 ` Matthew Wilcox
2008-03-26 20:29 ` Luck, Tony
2008-03-27 8:09 ` Jens Axboe
2008-03-27 14:15 ` down_spin() implementation Matthew Wilcox
2008-03-28 0:01 ` Nick Piggin
2008-03-28 12:45 ` Matthew Wilcox
2008-03-28 21:16 ` Luck, Tony
2008-03-28 23:48 ` Arnd Bergmann
[not found] ` <20080328124517.GQ16721-6jwH94ZQLHl74goWV3ctuw@public.gmane.org>
2008-03-29 1:04 ` Nick Piggin
2008-03-28 4:51 ` Stephen Rothwell
2008-03-28 5:03 ` Nick Piggin
2008-03-28 12:46 ` Matthew Wilcox
2008-03-28 12:51 ` Jens Axboe
2008-03-28 13:17 ` Matthew Wilcox
2008-03-28 13:24 ` Jens Axboe
2008-03-26 19:25 ` What if a TLB flush needed to sleep? Christoph Lameter
2008-03-26 20:29 ` Thomas Gleixner
2008-03-27 1:19 ` Christoph Lameter
2008-03-27 13:20 ` Peter Zijlstra [this message]
2008-03-27 18:44 ` Christoph Lameter
2008-03-28 9:59 ` Peter Zijlstra
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=1206624052.8514.570.camel@twins \
--to=peterz@infradead.org \
--cc=clameter@sgi.com \
--cc=linux-arch@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=tglx@linutronix.de \
--cc=tony.luck@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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox