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From: Con Kolivas <kernel@kolivas.org>
To: mru@users.sourceforge.net (Måns Rullgård), linux-kernel@vger.kernel.org
Subject: Re: [PATCH]O18.1int
Date: Mon, 25 Aug 2003 22:28:37 +1000	[thread overview]
Message-ID: <200308252228.37937.kernel@kolivas.org> (raw)
In-Reply-To: <yw1xbrueaqyv.fsf@users.sourceforge.net>

On Mon, 25 Aug 2003 21:58, Måns Rullgård wrote:
> Con Kolivas <kernel@kolivas.org> writes:
> >> >> Vanilla test1 has the spin effect.  Test2 doesn't.  I haven't tried
> >> >> vanilla test3 or test4.  As I've said, the O16.2-O16.3 patch
> >> >> introduced the problem.  With that patch reversed, everything is
> >> >> fine.  What problem does that patch fix?
> >> >
> >> > It's a generic fix for priority inversion but it induces badness in
> >> > smp, and latency in task preemption on up so it's not suitable.
> >>
> >> Now I'm confused.  If that patch is bad, then why is it in O18?
> >
> > No, the 16.2 patch is bad. 16.3 backed it out.
>
> OK, but it somehow made XEmacs behave badly.

Well it was a generic fix in 16.2 that helped XEmacs as I said. O15 also had a 
generic fix (child not preempting it's parent) but that too was covering up 
the real issue, but it wasnt as drastic as 16.2.

Con


  reply	other threads:[~2003-08-25 12:21 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-08-23  5:55 [PATCH]O18.1int Con Kolivas
2003-08-23  9:08 ` [PATCH]O18.1int Thomas Schlichter
2003-08-23  9:18   ` [PATCH]O18.1int Nick Piggin
2003-08-23 12:22     ` [PATCH]O18.1int Con Kolivas
2003-08-23 12:21   ` [PATCH]O18.1int Con Kolivas
2003-08-23  9:32 ` [PATCH]O18.1int Andrew Morton
2003-08-23  9:49   ` [PATCH]O18.1int Nick Piggin
2003-08-23 16:58     ` [PATCH]O18.1int Con Kolivas
2003-08-23 21:49       ` [PATCH]O18.1int Andrew Morton
2003-08-24  2:46         ` [PATCH]O18.1int Con Kolivas
2003-08-23 13:29   ` [PATCH]O18.1int Con Kolivas
2003-08-25  9:24 ` [PATCH]O18.1int Måns Rullgård
2003-08-25  9:42   ` [PATCH]O18.1int Alex Riesen
2003-08-25 10:16     ` [PATCH]O18.1int Con Kolivas
2003-08-25 10:21       ` [PATCH]O18.1int Alex Riesen
2003-08-25 21:02         ` [PATCH]O18.1int Alex Riesen
2003-08-25 22:48           ` [PATCH]O18.1int Con Kolivas
2003-08-25 23:00             ` [PATCH]O18.1int Alex Riesen
2003-08-26 22:03         ` [PATCH]O18.1int Alex Riesen
2003-08-25 10:34       ` [PATCH]O18.1int Måns Rullgård
2003-08-25 10:50         ` [PATCH]O18.1int Con Kolivas
2003-08-25 11:15           ` [PATCH]O18.1int Måns Rullgård
2003-08-25 11:37             ` [PATCH]O18.1int Con Kolivas
2003-08-25 11:58               ` [PATCH]O18.1int Måns Rullgård
2003-08-25 12:28                 ` Con Kolivas [this message]
2003-08-25 12:49                   ` [PATCH]O18.1int Måns Rullgård
2003-08-25 13:32                     ` [PATCH]O18.1int Con Kolivas
2003-08-25 10:17     ` [PATCH]O18.1int Måns Rullgård
2003-08-25 10:34       ` [PATCH]O18.1int Alex Riesen
2003-08-25 11:23         ` [PATCH]O18.1int Måns Rullgård
2003-08-25 10:48       ` [PATCH]O18.1int Con Kolivas
     [not found]       ` <3F49E482.7030902@cyberone.com.au>
     [not found]         ` <20030825102933.GA14552@Synopsys.COM>
2003-08-26 22:20           ` [PATCH]O18.1int Alex Riesen
2003-08-27  2:26             ` [PATCH]O18.1int Nick Piggin
2003-08-23 22:03 [PATCH]O18.1int Voluspa
2003-08-24  4:04 ` [PATCH]O18.1int Con Kolivas
2003-08-28 12:23 [PATCH]O18.1int Guillaume Chazarain
2003-08-28 13:43 [PATCH]O18.1int Guillaume Chazarain
2003-08-28 13:58 ` [PATCH]O18.1int Nick Piggin

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