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From: Ingo Oeser <ioe-lkml@rameria.de>
To: linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@elte.hu>, Andrew Morton <akpm@osdl.org>,
	Linus Torvalds <torvalds@osdl.org>,
	Arjan van de Ven <arjan@infradead.org>,
	Jes Sorensen <jes@trained-monkey.org>, Greg KH <greg@kroah.com>
Subject: Re: [patch 00/62] sem2mutex: -V1
Date: Fri, 13 Jan 2006 19:25:22 +0100	[thread overview]
Message-ID: <200601131925.34971.ioe-lkml@rameria.de> (raw)
In-Reply-To: <20060113134412.GA20339@elte.hu>

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Hi there,

On Friday 13 January 2006 14:44, Ingo Molnar wrote:
>     - it should stay a semaphore (if it's a genuine counting 
>       semaphore)
> 
>     - or it should get converted to a completion (if it's used as
>       a completion)
> 
>     - or it should get converted to struct work (if it's used as a 
>       workflow synchronizer).

Could we get for each of these and a mutex:

 - description 
 - common use case
 - small argument why this and nothing else should be used there

This would help driver writers a lot deciding what to use when, I think.

PS: After reading the Linux Kernel one could write a PhD thesis
    just containing explanations, examples and measurements
    of sychronization primitives, since Linux implements at least 
    most of them AFAIK :-)


Thanks & Regards

Ingo Oeser


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  reply	other threads:[~2006-01-13 18:25 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-01-13 12:44 Ingo Molnar
2006-01-13 12:59 ` Duncan Sands
2006-01-13 13:06   ` Arjan van de Ven
2006-01-13 13:44   ` Ingo Molnar
2006-01-13 18:25     ` Ingo Oeser [this message]
2006-01-13 19:56       ` Ingo Molnar
2006-01-13 21:04         ` Matan Peled
2006-01-13 21:25           ` Arjan van de Ven
2006-01-13 22:09             ` Junio C Hamano
2006-01-13 22:13               ` Arjan van de Ven
2006-01-14 13:22           ` Ingo Oeser
2006-01-14 13:49             ` Thomas Gleixner
2006-01-14 13:16         ` Ingo Oeser
2006-01-14 13:31           ` Arjan van de Ven
2006-01-14 13:38             ` Ingo Molnar
2006-01-13 13:23 ` Ingo Molnar

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