Messages in this thread | | | Date | Fri, 28 Mar 2008 12:17:58 +0900 | From | KAMEZAWA Hiroyuki <> | Subject | Re: [PATCH 2 of 4] hotplug-memory: adding non-section-aligned memory is bad |
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On Thu, 27 Mar 2008 19:51:26 -0700 Jeremy Fitzhardinge <jeremy@goop.org> wrote:
> > (I wrote online_page() in above, but online_pages() is maybe better. > > It does all what you want.) > > > > No, for my use-case the pages must be onlined one by one as they get > some physical memory assigned to them. At the time I do add_memory(), > I'm just allocating page structures, but there's no memory backing that > range. > yes, I see.
> That's why I need to disable the sysfs onlining interface, because it > bulk onlines the pages before there's anything behind them. >
My point is. online_pages() does following things.
- call notifier - update information , total_pages etc... - re-configure zonelist if necessary...
But online_page() not. Hmm...
How about capturing online_page() by balloon ? ex.) == call add_memory() to create mem_map call online_pages() against the whole section. <=== call this without sysfs. online_pages() do misc. jobs call online_page() one by one (arch dependent) called by walk_memory_resource. online_page() will finally call free_page(page). <=========== Xen capture here. Don't free onlined page and swallow them into baloon driver. ==
Thanks, -Kame
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