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From: Ingo Molnar <mingo@elte.hu>
To: Esben Nielsen <simlo@phys.au.dk>
Cc: Thomas Gleixner <tglx@linutronix.de>, linux-kernel@vger.kernel.org
Subject: Re: PI patch against 2.6.16-rt9
Date: Tue, 28 Mar 2006 23:02:48 +0200	[thread overview]
Message-ID: <20060328210248.GE1217@elte.hu> (raw)
In-Reply-To: <Pine.LNX.4.44L0.0603280002430.25351-100000@lifa03.phys.au.dk>


* Esben Nielsen <simlo@phys.au.dk> wrote:

> My girl friend will be angry for me not being to bed yet, but I had to 
> steal time to make this patch. I hope I managed to send it without 
> white-space damage or anything like it.

thanks - this looks fine to me, but i'm still worried about the 
nonatomic chain boosting side-effects that i outlined in the previous 
mail.

the tempting property of your patch is the fundamental reschedulability 
of the boosting itself - and the resulting simplicity of locking. On the 
con side, i dont see how we can detect deadlocks reliably, nor how we 
can avoid 'incorrect boosting' (outlined in the previous mail), if the 
chain gets 'broken'.

	Ingo

  reply	other threads:[~2006-03-28 21:05 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-03-26 23:42 PI patch against 2.6.16-rt9 Esben Nielsen
2006-03-26 23:47 ` Ingo Molnar
2006-03-27  0:07   ` Esben Nielsen
2006-03-27  0:11     ` Esben Nielsen
2006-03-27  0:21     ` Ingo Molnar
2006-03-27 15:00       ` Esben Nielsen
2006-03-27 23:05         ` Esben Nielsen
2006-03-28 21:02           ` Ingo Molnar [this message]
2006-03-28 20:55         ` Ingo Molnar
2006-03-28 21:17           ` Esben Nielsen
2006-03-28 21:24             ` Ingo Molnar
2006-03-28 22:51               ` Esben Nielsen
2006-03-29  7:14                 ` Ingo Molnar
2006-03-29  7:59                   ` Esben Nielsen
2006-03-29 12:35                     ` Ingo Molnar
2006-03-28 21:36             ` Thomas Gleixner
2006-03-28 22:23               ` Esben Nielsen
2006-03-28 22:42                 ` Thomas Gleixner
2006-03-28 23:34                   ` Esben Nielsen
2006-03-28 23:59                     ` Thomas Gleixner
2006-03-29 12:29                       ` Ingo Molnar

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