From: Heiko Carstens <heiko.carstens@de.ibm.com>
To: Srinivasa Ds <srinivasa@in.ibm.com>
Cc: anton@au1.ibm.com, paulus@samba.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC] [PATCH] cpu_hotplug on IBM JS20 system
Date: Mon, 13 Nov 2006 14:09:26 +0100 [thread overview]
Message-ID: <20061113130926.GD7085@osiris.boeblingen.de.ibm.com> (raw)
In-Reply-To: <45586EB5.40409@in.ibm.com>
> Since we are not supported by hardware for cpu hotplug. I have developed
> the patch which will disable cpu hotplug on IBM bladecentre JS20. Please
> let me know your comments on this please.
> +extern int cpu_hotplug_disabled;
> +extern struct mutex cpu_add_remove_lock;
[...]
> + if(rtas_stop_self_args.token == RTAS_UNKNOWN_SERVICE) {
> + mutex_lock(&cpu_add_remove_lock);
> + cpu_hotplug_disabled = 1;
> + mutex_unlock(&cpu_add_remove_lock);
> + }
> +
> #endif /* CONFIG_HOTPLUG_CPU */
> #ifdef CONFIG_RTAS_ERROR_LOGGING
> rtas_last_error_token = rtas_token("rtas-last-error");
You should add a function to kernel/cpu.c which you can call in order to
disable cpu hotplug instead of exporting its private data structures.
next prev parent reply other threads:[~2006-11-13 13:10 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-13 13:10 Srinivasa Ds
2006-11-13 13:09 ` Heiko Carstens [this message]
2006-11-13 15:37 ` Gautham R Shenoy
2006-11-13 21:39 ` Benjamin Herrenschmidt
2006-11-14 13:37 ` Srinivasa Ds
2006-11-14 14:14 ` Srinivasa Ds
2006-11-15 2:58 ` Michael Ellerman
2006-11-15 4:50 ` Srinivasa Ds
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