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From: Vivek Goyal <vgoyal@redhat.com>
To: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
	schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com,
	kexec@lists.infradead.org, linux-kernel@vger.kernel.org,
	Kay Sievers <kay.sievers@vrfy.org>
Subject: Re: kdump: No udev events for memory hotplug?
Date: Wed, 26 Oct 2011 15:24:49 -0400	[thread overview]
Message-ID: <20111026192449.GE355@redhat.com> (raw)
In-Reply-To: <1319645292.3321.24.camel@br98xy6r>

On Wed, Oct 26, 2011 at 06:08:12PM +0200, Michael Holzheu wrote:
> Hello Vivek and Eric,
> 
> I noticed that on my system kernel 3.1 *no* udev events for memory
> hotplug are generated. Same on my RHEL6.1.
> 
> # udevadm monitor
> # echo offline > /sys/devices/system/memory/memory4/state
> 
> -> No event
> 
> But we need the udev events in order to do a kdump reload for setting up
> the ELF loads correctly.
> 
> In my /etc/udev/rules.d/98-kexec.rules there are rules for memory
> hotplug:
> 
> SUBSYSTEM=="memory", ACTION=="add", PROGRAM="/etc/init.d/kdump restart"
> SUBSYSTEM=="memory", ACTION=="remove", PROGRAM="/etc/init.d/kdump
> restart"
> 
> Perhaps/probably I am missing something?

I don't know. Sounds like a bug. I have never looked into it. CCing Kay,
if he has any thoughts.

Are any events generated for memory add?

Thanks
Vivek

  reply	other threads:[~2011-10-26 19:24 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-10-26 16:08 kdump: No udev events for memory hotplug? Michael Holzheu
2011-10-26 19:24 ` Vivek Goyal [this message]
2011-10-27  7:30   ` Heiko Carstens
2011-10-27  9:32     ` [PATCH] kdump: Add udev events for memory online/offline Michael Holzheu
2011-10-28 22:41       ` Andrew Morton
2011-10-28 22:57         ` Dave Hansen
2011-10-28 22:46       ` Andrew Morton
2011-10-31 13:21         ` [PATCH v2] " Michael Holzheu
2011-11-14  2:37           ` WANG Cong
2011-10-27 12:45     ` kdump: No udev events for memory hotplug? Dave Hansen
2011-10-27 13:18       ` Américo Wang
2011-10-27  7:45 ` Américo Wang

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