On Mon, 9 Mar 2020 11:16:10 +0000
bauerchen(陈蒙蒙) <bauerc...@tencent.com> wrote:

> Thanks,  in fact,do_touch_pages is called just when vm starts up, but using 
> init flag and Gonce maybe more elegant !
> if needed,I can submit a new patch ! 
> thanks very much!

it's called from os_mem_prealloc() -> touch_all_pages() which is called
at least once per an instance of hotsmem backend. So if several backends
are used then it should be called several times.
The same applies when a hostmem backend is added during runtime (hotplug)


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