netdev
[Top] [All Lists]

Re: MSEC_TO_JIFFIES is messed up...

To: Andrew Morton <akpm@xxxxxxxx>
Subject: Re: MSEC_TO_JIFFIES is messed up...
From: Ingo Molnar <mingo@xxxxxxx>
Date: Wed, 12 May 2004 23:17:48 +0200
Cc: Valdis.Kletnieks@xxxxxx, davidel@xxxxxxxxxxxxxxx, jgarzik@xxxxxxxxx, greg@xxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxx
In-reply-to: <20040512140729.476ace9e.akpm@xxxxxxxx>
References: <20040512181903.GG13421@xxxxxxxxx> <40A26FFA.4030701@xxxxxxxxx> <20040512193349.GA14936@xxxxxxx> <200405121947.i4CJlJm5029666@xxxxxxxxxxxxxxxxxxxxxxx> <Pine.LNX.4.58.0405121255170.11950@xxxxxxxxxxxxxxxxxxxxxxx> <200405122007.i4CK7GPQ020444@xxxxxxxxxxxxxxxxxxxxxxx> <20040512202807.GA16849@xxxxxxx> <20040512203500.GA17999@xxxxxxx> <20040512205028.GA18806@xxxxxxx> <20040512140729.476ace9e.akpm@xxxxxxxx>
Sender: netdev-bounce@xxxxxxxxxxx
User-agent: Mutt/1.4.1i
* Andrew Morton <akpm@xxxxxxxx> wrote:

> Ingo Molnar <mingo@xxxxxxx> wrote:
> >
> > yet another patch - this time it's: complete, covers irda, accelerates
> >  HZ=100, unifies the slightly differing namespaces and compiles/boots as
> >  well.
> > 
> > ...
> > 
> > [hz-cleanup-2.6.6-A2  text/plain (2657 bytes)]
> 
> This doesn't have the little round up which some implementations had,
> so someone who tries to sleep for 9 millisscondes on a 100HZ box may
> end up in a busywait.  Looks risky.

ok. -A3 attached, it does the roundup in the msec->jiffies conversion. 
(not the other way around though, and that's fine.)

        Ingo

Attachment: hz-cleanup-2.6.6-A3
Description: Text document

<Prev in Thread] Current Thread [Next in Thread>