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From: Gianni Tedesco <gianni@scaramanga.co.uk>
To: Rusty Russell <rusty@rustcorp.com.au>
Cc: davem@redhat.com, arjanv@redhat.com, torvalds@transmeta.com,
	greg@kroah.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Remove module reference counting.
Date: 25 Jul 2003 23:43:16 +0100	[thread overview]
Message-ID: <1059172995.16255.6.camel@sherbert> (raw)
In-Reply-To: <20030725173900.D7DE12C2A9@lists.samba.org>

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On Thu, 2003-07-24 at 19:00, Rusty Russell wrote:
> 	If module removal is to be a rare and unusual event, it
> doesn't seem so sensible to go to great lengths in the code to handle
> just that case.  In fact, it's easier to leave the module memory in
> place, and not have the concept of parts of the kernel text (and some
> types of kernel data) vanishing.

Wasn't the idea once banded about of a 2-stage unload that went
something like:

1. ->cleanup() - unregister IRQ handlers, timers, etc.
2. Quiesce the system
3. Safe to unload

surely if nothing is registered and all CPUs do a voluntary schedule()
then there can be no chance of calling back in to the module.

LOL. Or am I kidding myself here? :)

-- 
// Gianni Tedesco (gianni at scaramanga dot co dot uk)
lynx --source www.scaramanga.co.uk/gianni-at-ecsc.asc | gpg --import
8646BE7D: 6D9F 2287 870E A2C9 8F60 3A3C 91B5 7669 8646 BE7D


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  parent reply	other threads:[~2003-07-25 22:27 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-07-24 18:00 [PATCH] Remove module reference counting Rusty Russell
2003-07-25 17:47 ` David S. Miller
2003-07-27 18:50   ` Rusty Russell
2003-07-25 17:54 ` Greg KH
2003-07-25 19:11   ` Greg KH
2003-07-25 19:26 ` Stephen Hemminger
2003-07-25 19:32   ` Greg KH
2003-07-25 22:26   ` Rusty Russell
2003-07-26 19:31     ` Linus Torvalds
2003-07-26 19:37       ` Arjan van de Ven
2003-07-27  5:38         ` Aschwin Marsman
2003-07-27 11:10           ` Alan Cox
2003-07-27 11:09         ` Alan Cox
2003-07-27 19:34       ` Rusty Russell
2003-07-27 21:47         ` Arjan van de Ven
2003-07-28  0:01           ` Alan Cox
2003-07-28  0:12           ` Bill Nottingham
2003-07-28 11:38             ` Alan Cox
2003-07-29 20:33               ` Rusty Russell
2003-07-30  1:55                 ` Greg KH
2003-07-30 14:40                 ` Alan Cox
2003-07-28 11:40         ` Alan Cox
2003-07-28 18:11         ` Gianni Tedesco
2003-07-28 19:03           ` Mike Fedyk
2003-08-01  2:39         ` Linus Torvalds
2003-07-25 23:24   ` Alan Cox
2003-07-27 18:48     ` Rusty Russell
2003-07-25 22:43 ` Gianni Tedesco [this message]
2003-07-25 23:37   ` Bernd Eckenfels
2003-07-26 20:18   ` Rusty Russell
2003-07-28 11:51 ` Rahul Karnik
2003-07-28 23:13   ` Rusty Russell
2003-07-29  2:39     ` Rahul Karnik
  -- strict thread matches above, loose matches on Subject: below --
2003-07-29  2:10 Perez-Gonzalez, Inaky

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