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From: Stephen Hemminger <stephen@networkplumber.org>
To: Don Provan <dprovan@bivio.net>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH] mbuf: add comment explaining confusing code
Date: Mon, 30 Mar 2015 11:15:05 -0700	[thread overview]
Message-ID: <20150330111505.6f1b6f4b@urahara> (raw)
In-Reply-To: <CY1PR0101MB098798EEE9925C308B388CCDA0F50@CY1PR0101MB0987.prod.exchangelabs.com>

On Mon, 30 Mar 2015 17:39:06 +0000
Don Provan <dprovan@bivio.net> wrote:

> In all the debate about atomics, I don't think anyone got around to pointing out that in the unlikely case that the refcnt is not 1, then it's equally unlikely that decrementing it will result in 0 despite the code's claim to the contrary. That's the part that confused me. Would it make sense to fix this while adding the comment?

Really doubt the second likely() makes any difference in code speed.
Should probably just be removed.

  reply	other threads:[~2015-03-30 18:15 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-26 21:14 Bruce Richardson
2015-03-26 21:31 ` Olivier MATZ
2015-03-27 10:29 ` Neil Horman
2015-03-27 10:49   ` Ananyev, Konstantin
2015-03-27 11:32   ` Bruce Richardson
2015-03-27 12:42     ` Neil Horman
2015-03-27 14:07     ` Neil Horman
2015-03-27 14:30       ` Bruce Richardson
2015-03-27 14:38         ` Neil Horman
2015-03-27 14:55           ` Bruce Richardson
2015-03-27 16:43             ` Neil Horman
2015-03-27 16:56               ` Richardson, Bruce
2015-03-30 17:11                 ` Thomas Monjalon
2015-03-30 17:39                 ` Don Provan
2015-03-30 18:15                   ` Stephen Hemminger [this message]
2015-03-31 12:33                   ` Zoltan Kiss
2015-03-30 19:39         ` Marc Sune
2015-03-30 20:26           ` Neil Horman

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