On 5/5/2018 12:53 AM, Pavel Tatashin Wrote:
I'm wondering, ain't simple enabling of config DEFERRED_STRUCT_PAGE_INIT provide even better speed-up? If that is the case then it seems like this series is not needed at all, right? I am not sure why is this config optional. It looks like it could be enabled by default or even unconditionally considering that with commit c9e97a1997fb ("mm: initialize pages on demand during boot") the deferred code is statically disabled after all the pages are initialized.Hi Daniel, Currently, deferred struct pages are initialized in parallel only on NUMA machines. I would like to make a change to use all the available CPUs even on a single socket systems, but that is not there yet. So, I believe Jia's performance improvements are still relevant.
Thanks for the information. I checked the config in my armv8a server, DEFERRED_STRUCT_PAGE_INIT has not been enabled yet.And my server is single socket. Cheers. Jia
