linux-kernel - Re: kdump: No udev events for memory hotplug?

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAM_iQpXxe_PTSh2LcFQOwBqjBeME1y0eZVn67Q7_GQB1RrNW1A@mail.gmail.com>
Date:	Thu, 27 Oct 2011 21:18:24 +0800
From:	Américo Wang <xiyou.wangcong@...il.com>
To:	Dave Hansen <haveblue@...ibm.com>
Cc:	Heiko Carstens <heiko.carstens@...ibm.com>,
	Vivek Goyal <vgoyal@...hat.com>,
	Michael Holzheu <holzheu@...ux.vnet.ibm.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	schwidefsky@...ibm.com, kexec@...ts.infradead.org,
	linux-kernel@...r.kernel.org, Kay Sievers <kay.sievers@...y.org>
Subject: Re: kdump: No udev events for memory hotplug?

On Thu, Oct 27, 2011 at 8:45 PM, Dave Hansen <haveblue@...ibm.com> wrote:
> On Thu, 2011-10-27 at 09:30 +0200, Heiko Carstens wrote:
>> > Are any events generated for memory add?
>>
>> Looks like uevents are only genereted when memory gets registered and
>> unregistered, but not when when it gets set online or offline.
>> To achieve that you would need to add similar code to
>> store_mem_state()/memory_block_change_state() in drivers/base/memory.c
>> like we have it already in store_online() in drivers/base/cpu.c
>
> Instead of doing it at that low a level, perhaps we should be generating
> events when 'totalram_pages' changes.  That way, we'll also trigger
> events when things like ballooning happen.
>

I think we should separate the memory hot-plug issues from ballooning issues,
so probably we need another uevent for this...
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/