On Thu, May 15, 2014 at 10:41:14AM -0400, Johannes Weiner wrote: > Is it necessary that resume paths allocate at all? Freeing at suspend > what you have to reallocate at resume is asking for trouble. It's not > just higher order allocations, either, even order-0 allocations are > less reliable without GFP_IOFS. So I think this should be avoided as > much as possible.
Well, in my case its because suspend does an effective hot-unplug of all CPUs in the system except CPU0. And if the cpu topology changes I need to allocate new data structures and free the old ones. The reverse is true on resume, it hot-plugs all CPUs again, same story.
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