From: Corey Minyard <cminyard@mvista.com>
To: Robert Love <rml@tech9.net>
Cc: John Levon <levon@movementarian.org>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] NMI request/release
Date: Tue, 22 Oct 2002 13:08:49 -0500 [thread overview]
Message-ID: <3DB59431.2090807@mvista.com> (raw)
In-Reply-To: 1035307430.1008.1476.camel@phantasy
Robert Love wrote:
>On Tue, 2002-10-22 at 09:02, Corey Minyard wrote:
>
>
>
>>I looked, and the rcu code relys on turning off interrupts to avoid
>>preemption. So it won't work.
>>
>>
>
>At least on the variant of RCU that is in 2.5, the RCU code does the
>read side by disabling preemption. Nothing else.
>
In 2.5.44, stock from kernel.org, rcu_process_callbacks() calls
local_irq_disable(). Is that just preemption disabling, now?
>The write side is the same with or without preemption - wait until all
>readers are quiescent, change the copy, etc.
>
>But anyhow, disabling interrupts should not affect NMIs, no?
>
You are correct. disabling preemption or interrupts has no effect on NMIs.
-Corey
next prev parent reply other threads:[~2002-10-22 18:17 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-22 1:32 [PATCH] NMI request/release Corey Minyard
2002-10-22 2:10 ` John Levon
2002-10-22 2:32 ` Corey Minyard
2002-10-22 2:53 ` John Levon
2002-10-22 13:02 ` Corey Minyard
2002-10-22 15:09 ` John Levon
2002-10-22 16:03 ` Corey Minyard
2002-10-22 17:23 ` Robert Love
2002-10-22 18:08 ` Corey Minyard [this message]
2002-10-22 18:16 ` Robert Love
2002-10-22 20:04 ` Dipankar Sarma
2002-10-22 17:53 ` Dipankar Sarma
2002-10-22 18:05 ` Corey Minyard
2002-10-22 18:08 ` Dipankar Sarma
2002-10-22 18:29 ` Corey Minyard
2002-10-22 19:08 ` John Levon
2002-10-22 21:36 ` [PATCH] NMI request/release, version 3 Corey Minyard
2002-10-23 17:33 ` Dipankar Sarma
2002-10-23 18:03 ` Corey Minyard
2002-10-23 18:57 ` Dipankar Sarma
2002-10-23 20:14 ` [PATCH] NMI request/release, version 4 Corey Minyard
2002-10-23 20:50 ` Dipankar Sarma
2002-10-23 21:53 ` Corey Minyard
2002-10-24 7:41 ` Dipankar Sarma
2002-10-24 13:08 ` Corey Minyard
2002-10-24 7:50 ` Dipankar Sarma
2002-10-24 13:05 ` Corey Minyard
2002-10-24 13:28 ` [PATCH] NMI request/release, version 5 - I think this one's ready Corey Minyard
2002-10-24 14:46 ` John Levon
2002-10-24 15:36 ` Corey Minyard
2002-10-24 17:18 ` John Levon
2002-10-24 17:43 ` Corey Minyard
2002-10-24 18:04 ` John Levon
2002-10-24 18:32 ` Corey Minyard
2002-10-24 18:47 ` John Levon
2002-10-24 20:03 ` Corey Minyard
2002-10-24 20:29 ` John Levon
2002-10-25 1:22 ` [PATCH] NMI request/release, version 6 - "Well I thought the last one was ready" Corey Minyard
2002-10-25 1:39 ` John Levon
2002-10-25 1:58 ` Jeff Garzik
2002-10-25 2:01 ` [PATCH] NMI request/release, version 7 - minor cleanups Corey Minyard
2002-10-25 13:26 ` [PATCH] NMI request/release, version 8 Corey Minyard
2002-10-22 12:23 ` [PATCH] NMI request/release Suparna Bhattacharya
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