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Date: Thu, 30 Jun 2005 23:59:34 +0200
From: Willy Tarreau <willy@w.ods.org>
To: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
Cc: Olivier Croquette <ocroquette@free.fr>, Andrew Morton <akpm@osdl.org>,
       torvalds@osdl.org, LKML <linux-kernel@vger.kernel.org>
Subject: Re: setitimer expire too early (Kernel 2.4)
Message-ID: <20050630215934.GL8907@alpha.home.local>
References: <42C444AA.2070508@free.fr> <20050630165053.GA8220@logos.cnet>
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Hi Marcelo,

you type faster than me :-)

On Thu, Jun 30, 2005 at 01:50:53PM -0300, Marcelo Tosatti wrote:
 
> And what about the side effects:
> This however will produce pathological cases, like having a idle system
> being requested 1 ms timeouts will give systematically 2 ms timeouts,
> whereas currently it simply gives a few usecs less than 1 ms. 

Unless I'm mistaken, it's worse. 1 ms will lead to 11 ms because
HZ is still 100 on most common archs in 2.4. Perhaps we could find
a way to round it_real_incr up instead of systematically adding 1
to interval ?

Cheers,
Willy