From: Christoph Lameter <cl@linux.com>
To: Pekka Enberg <penberg@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Ingo Molnar <mingo@elte.hu>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
Tejun Heo <tj@kernel.org>, Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [GIT PULL] slab fixes for 3.2-rc4
Date: Wed, 21 Dec 2011 09:20:29 -0600 (CST) [thread overview]
Message-ID: <alpine.DEB.2.00.1112210916400.9601@router.home> (raw)
In-Reply-To: <CAOJsxLGj+y2UygJLQO4xbxqgY5OcU65RBZg-P7yecNgc6fKZjQ@mail.gmail.com>
On Wed, 21 Dec 2011, Pekka Enberg wrote:
> I still don't understand why we'd want separate preempt safe and
> irqsafe variants. It should be enough to have only unsafe and safe
> variants where the latter would always do the right thing.
The effort to make something irqsafe is higher than making it preempt
safe. If that difference is not important then we could just have safe and
unsafe variants. Traditionally counter operations were only preempt safe
though. So making those irqsafe would increse the overhead.
prev parent reply other threads:[~2011-12-21 15:20 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-29 18:02 [GIT PULL] slab fixes for 3.2-rc4 Pekka Enberg
2011-11-29 19:29 ` Linus Torvalds
2011-11-29 19:38 ` Linus Torvalds
2011-12-20 9:47 ` Pekka Enberg
2011-12-20 16:23 ` Tejun Heo
2011-12-20 16:31 ` Christoph Lameter
2011-12-20 19:28 ` Linus Torvalds
2011-12-20 20:28 ` Tejun Heo
2011-12-21 8:08 ` Pekka Enberg
2011-12-21 17:09 ` Tejun Heo
2011-12-21 15:16 ` Christoph Lameter
2011-12-21 17:05 ` Tejun Heo
2011-12-22 2:19 ` Linus Torvalds
2011-12-22 16:05 ` Tejun Heo
2011-12-28 10:25 ` Benjamin Herrenschmidt
2011-12-22 14:58 ` Christoph Lameter
2011-12-22 16:08 ` Tejun Heo
2011-12-22 17:58 ` Christoph Lameter
2011-12-22 18:03 ` Ingo Molnar
2011-12-22 18:31 ` Linus Torvalds
2011-12-23 16:55 ` Christoph Lameter
2011-12-23 20:54 ` Linus Torvalds
2012-01-04 15:30 ` Christoph Lameter
2012-01-04 16:07 ` Linus Torvalds
2012-01-04 17:00 ` Christoph Lameter
2012-01-04 23:10 ` Linus Torvalds
2012-01-05 19:15 ` Christoph Lameter
2012-01-05 19:27 ` Linus Torvalds
2011-12-22 18:47 ` Tejun Heo
2011-12-20 16:26 ` Christoph Lameter
2011-12-21 8:06 ` Pekka Enberg
2011-12-21 15:20 ` Christoph Lameter [this message]
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