kdump: No udev events for memory hotplug?

Américo Wang xiyou.wangcong at gmail.com
Thu Oct 27 09:18:24 EDT 2011

On Thu, Oct 27, 2011 at 8:45 PM, Dave Hansen <haveblue at us.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...

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