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Re: [PATCH] synchronize_irq needs a barrier

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From: Benjamin Herrenschmidt
Subject: Re: [PATCH] synchronize_irq needs a barrier
Date: Thursday, October 18, 2007 - 2:35 pm

On Thu, 2007-10-18 at 22:35 +0800, Herbert Xu wrote:

Isn't it too late ? The barrier should be before the test_bit, to
prevent it from moving up.

Ben.
 

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Messages in current thread:
[PATCH] synchronize_irq needs a barrier, Benjamin Herrenschmidt, (Wed Oct 17, 6:25 pm)
Re: [PATCH] synchronize_irq needs a barrier, Andrew Morton, (Wed Oct 17, 6:45 pm)
Re: [PATCH] synchronize_irq needs a barrier, Benjamin Herrenschmidt, (Wed Oct 17, 6:55 pm)
Re: [PATCH] synchronize_irq needs a barrier, Linus Torvalds, (Wed Oct 17, 7:12 pm)
Re: [PATCH] synchronize_irq needs a barrier, Benjamin Herrenschmidt, (Wed Oct 17, 7:40 pm)
Re: [PATCH] synchronize_irq needs a barrier, Benjamin Herrenschmidt, (Wed Oct 17, 7:57 pm)
Re: [PATCH] synchronize_irq needs a barrier, Herbert Xu, (Thu Oct 18, 7:35 am)
Re: [PATCH] synchronize_irq needs a barrier, Herbert Xu, (Thu Oct 18, 7:56 am)
Re: [PATCH] synchronize_irq needs a barrier, Benjamin Herrenschmidt, (Thu Oct 18, 2:35 pm)
Re: [PATCH] synchronize_irq needs a barrier, Benjamin Herrenschmidt, (Thu Oct 18, 3:05 pm)
Re: [PATCH] synchronize_irq needs a barrier, Linus Torvalds, (Thu Oct 18, 3:52 pm)
Re: [PATCH] synchronize_irq needs a barrier, Benjamin Herrenschmidt, (Thu Oct 18, 4:17 pm)
Re: [PATCH] synchronize_irq needs a barrier, Linus Torvalds, (Thu Oct 18, 4:39 pm)
Re: [PATCH] synchronize_irq needs a barrier, Benjamin Herrenschmidt, (Thu Oct 18, 4:52 pm)
Re: [PATCH] synchronize_irq needs a barrier, Herbert Xu, (Thu Oct 18, 7:32 pm)
Re: [PATCH] synchronize_irq needs a barrier, Nick Piggin, (Thu Oct 18, 7:52 pm)
Re: [PATCH] synchronize_irq needs a barrier, Linus Torvalds, (Thu Oct 18, 7:55 pm)
Re: [PATCH] synchronize_irq needs a barrier, Linus Torvalds, (Thu Oct 18, 8:26 pm)
Re: [PATCH] synchronize_irq needs a barrier, Herbert Xu, (Thu Oct 18, 8:28 pm)
Re: [PATCH] synchronize_irq needs a barrier, Benjamin Herrenschmidt, (Thu Oct 18, 9:11 pm)
Re: [PATCH] synchronize_irq needs a barrier, Herbert Xu, (Thu Oct 18, 9:20 pm)
Re: [PATCH] synchronize_irq needs a barrier, Benjamin Herrenschmidt, (Thu Oct 18, 9:26 pm)
Re: [PATCH] synchronize_irq needs a barrier, Benjamin Herrenschmidt, (Thu Oct 18, 9:29 pm)
Re: [PATCH] synchronize_irq needs a barrier, Benjamin Herrenschmidt, (Thu Oct 18, 9:35 pm)
Re: [PATCH] synchronize_irq needs a barrier, Herbert Xu, (Thu Oct 18, 9:48 pm)
Re: [PATCH] synchronize_irq needs a barrier, Nick Piggin, (Thu Oct 18, 9:49 pm)
Re: [PATCH] synchronize_irq needs a barrier, Benjamin Herrenschmidt, (Thu Oct 18, 9:58 pm)
[NET]: Fix possible dev_deactivate race condition, Herbert Xu, (Thu Oct 18, 10:36 pm)
Re: [NET]: Fix possible dev_deactivate race condition, David Miller, (Thu Oct 18, 10:38 pm)
Re: [PATCH] synchronize_irq needs a barrier, Herbert Xu, (Thu Oct 18, 10:53 pm)
Re: [NET]: Fix possible dev_deactivate race condition, Peter Zijlstra, (Fri Oct 19, 12:35 am)
Re: [NET]: Fix possible dev_deactivate race condition, Herbert Xu, (Fri Oct 19, 2:29 am)
Re: [PATCH] synchronize_irq needs a barrier, Maxim Levitsky, (Fri Oct 19, 7:02 pm)
Re: [PATCH] synchronize_irq needs a barrier, Linus Torvalds, (Fri Oct 19, 7:25 pm)
Re: [PATCH] synchronize_irq needs a barrier, Maxim Levitsky, (Fri Oct 19, 8:10 pm)
Re: [PATCH] synchronize_irq needs a barrier, Herbert Xu, (Fri Oct 19, 8:37 pm)
Re: [PATCH] synchronize_irq needs a barrier, Benjamin Herrenschmidt, (Fri Oct 19, 8:56 pm)
Re: [PATCH] synchronize_irq needs a barrier, Benjamin Herrenschmidt, (Fri Oct 19, 9:04 pm)
Re: [PATCH] synchronize_irq needs a barrier, Benjamin Herrenschmidt, (Fri Oct 19, 9:06 pm)
Re: [PATCH] synchronize_irq needs a barrier, Benjamin Herrenschmidt, (Fri Oct 19, 9:09 pm)
Re: [PATCH] synchronize_irq needs a barrier, Maxim Levitsky, (Fri Oct 19, 9:24 pm)
Re: [PATCH] synchronize_irq needs a barrier, Benjamin Herrenschmidt, (Fri Oct 19, 10:04 pm)
Re: [PATCH] synchronize_irq needs a barrier, Maxim Levitsky, (Fri Oct 19, 10:36 pm)
Re: [PATCH] synchronize_irq needs a barrier, Benjamin Herrenschmidt, (Fri Oct 19, 10:46 pm)
Re: [PATCH] synchronize_irq needs a barrier, Maxim Levitsky, (Fri Oct 19, 11:06 pm)
Re: [PATCH] synchronize_irq needs a barrier, Benjamin Herrenschmidt, (Fri Oct 19, 11:13 pm)
Re: [PATCH] synchronize_irq needs a barrier, Benjamin Herrenschmidt, (Sun Oct 21, 2:10 pm)
[IRQ]: Fix synchronize_irq races with IRQ handler, Herbert Xu, (Mon Oct 22, 8:26 pm)