linux-kernel - Re: [PATCH] net: tcp: Fix a PTO timing granularity issue

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Message-ID: <1432747456.4060.409.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Wed, 27 May 2015 10:24:16 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Ido Yariv <ido@...ery.com>
Cc:	David Laight <David.Laight@...LAB.COM>,
	"David S. Miller" <davem@...emloft.net>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	James Morris <jmorris@...ei.org>,
	Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
	Patrick McHardy <kaber@...sh.net>,
	Nandita Dukkipati <nanditad@...gle.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Ido Yariv <idox.yariv@...el.com>
Subject: Re: [PATCH] net: tcp: Fix a PTO timing granularity issue

On Wed, 2015-05-27 at 12:54 -0400, Ido Yariv wrote:
> Hi Eric,

> That's a nice optimization ;)
> 
> However, I think that with Nicholas Mc Guire's recent changes to
> msecs_to_jiffies (http://marc.info/?l=linux-kernel&m=143195210010666),
> we should get this for free, no?

Well, on net and net-next tree we currently have :

$ grep msecs_to_jiffies include/linux/jiffies.h
extern unsigned long msecs_to_jiffies(const unsigned int m);

Given your patch is for stable, I would not mind having this done
anyway.



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