From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Ming Lei <tom.leiming@gmail.com>, Shaohua Li <shli@kernel.org>,
Al Viro <viro@zeniv.linux.org.uk>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org
Subject: Re: + atomic-improve-atomic_inc_unless_negative-atomic_dec_unless_positive .patch added to -mm tree
Date: Fri, 22 Mar 2013 09:34:54 -0700 [thread overview]
Message-ID: <20130322163454.GO3637@linux.vnet.ibm.com> (raw)
In-Reply-To: <1363906618.4431.37.camel@edumazet-glaptop>
On Thu, Mar 21, 2013 at 03:56:58PM -0700, Eric Dumazet wrote:
> On Thu, 2013-03-21 at 19:30 +0100, Oleg Nesterov wrote:
>
> > To me, it would be better to kill atomic_inc_not_zero_hint() or unify
> > unify it with atomic_inc_not_zero(). But this is another story.
>
> git is your friend.
>
> I suggest you read 3f9d35b9514 changelog before killing it, thanks.
Hello, Eric,
Does the addition of a memory barrier in the not-zero case impose
too large a performance penalty?
Thanx, Paul
next prev parent reply other threads:[~2013-03-22 16:35 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-14 16:24 + atomic-improve-atomic_inc_unless_negative-atomic_dec_unless_positive .patch added to -mm tree Oleg Nesterov
2013-03-15 3:46 ` Ming Lei
2013-03-15 13:46 ` Oleg Nesterov
2013-03-15 15:13 ` Ming Lei
2013-03-15 16:51 ` Oleg Nesterov
2013-03-15 17:23 ` Frederic Weisbecker
2013-03-15 17:51 ` Oleg Nesterov
2013-03-15 18:34 ` Frederic Weisbecker
2013-03-15 20:17 ` Paul E. McKenney
2013-03-16 18:30 ` Oleg Nesterov
2013-03-17 17:26 ` Paul E. McKenney
2013-03-21 17:08 ` Oleg Nesterov
2013-03-21 17:34 ` Paul E. McKenney
2013-03-21 18:03 ` Eric Dumazet
2013-03-21 18:30 ` Oleg Nesterov
2013-03-21 22:56 ` Eric Dumazet
2013-03-22 12:59 ` Oleg Nesterov
2013-03-22 16:34 ` Paul E. McKenney [this message]
2013-03-16 18:19 ` Oleg Nesterov
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