linux-kernel - Re: [net-next,v3] tcp: Improve setsockopt() TCP_USER

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <c29f1535-3c5d-e588-862c-ba948363c973@gmail.com>
Date:   Tue, 10 Jul 2018 05:48:22 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Jon Maxwell <jmaxwell37@...il.com>, davem@...emloft.net
Cc:     edumazet@...gle.com, ncardwell@...gle.com, David.Laight@...lab.com,
        kuznet@....inr.ac.ru, yoshfuji@...ux-ipv6.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        jmaxwell@...hat.com
Subject: Re: [net-next,v3] tcp: Improve setsockopt() TCP_USER_TIMEOUT accuracy



On 07/10/2018 05:38 AM, Eric Dumazet wrote:

> Note that if we always do jiffies_to_msecs(icsk->icsk_user_timeout) in TCP,
> we also could change the convention and store msecs in this field instead of jiffies.
> 
> That would eliminate the msecs_to_jiffies() and jiffies_to_msecs() dance.
> 
> (That would be done in a patch of its own, of course)

tcp_keepalive_timer() does use icsk->icsk_user_timeout directly in jiffies unit,
but considering keeapalive timers are rarely used, this point would have to
do the msecs_to_jiffies() conversion.