netdev - Re: [PATCH net-next] net: sched: use pinned timers

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Message-ID: <54AD0543.1090806@rcs-rds.ro>
Date:	Wed, 07 Jan 2015 12:06:59 +0200
From:	Cosmin GIRADU <cosmin.giradu@...-rds.ro>
To:	eric.dumazet@...il.com
CC:	netdev@...r.kernel.org
Subject: Re: [PATCH net-next] net: sched: use pinned timers

On 26/09/14 07:27, David Miller wrote:
> From: Eric Dumazet <eric.dumazet@...il.com>
> Date: Sat, 20 Sep 2014 18:01:30 -0700
>
>> From: Eric Dumazet <edumazet@...gle.com>
>>
>> While using a MQ + NETEM setup, I had confirmation that the default
>> timer migration ( /proc/sys/kernel/timer_migration ) is killing us.
>>
>> Installing this on a receiver side of a TCP_STREAM test, (NIC has 8 TX
>> queues) :
>  ...
>> Current Qdiscs that benefit from this change are :
>>
>> 	netem, cbq, fq, hfsc, tbf, htb.
>>
>> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Looks great, applied, thanks Eric.
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>
Hi Eric,

    I saw that this patch didn't make it's way into the stable branches.
So I have two questions:
        - Would it be safe to apply to linux-3.12.x stable?
        - If yes, would there be any [noticeable] efects on a [pretty
complex] HTB setup? (I know, test and I'll see,
           but if theory sais I won't, then there would be no point to
the test, would there?)

Thank you!

-- 

Cosmin GIRADU
OSS Engineer
RCS & RDS - Unified Services
Phone:  +40-31-400-6323
Mobile: +40-77-020-0858
http://www.rcs-rds.ro

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