On Fri, Jun 3, 2016 at 11:26 AM, Konstantin Belousov <kostikbel_at_gmail.com> wrote: > On Fri, Jun 03, 2016 at 09:29:16AM -0600, Alan Somers wrote: >> I notice that, with the exception of the VM_PHYSSEG_MAX change, these >> patches never made it into head or ports. Are they unsuitable for low >> core-count machines, or is there some other reason not to commit them? >> If not, what would it take to get these into 11.0 or 11.1 ? > > The fast page fault handler was redesigned and committed in r269728 > and r270011 (with several follow-ups). > Instead of lock-less buffer queues iterators, Jeff changed buffer allocator > to use uma, see r289279. Other improvement to the buffer cache was > committed as r267255. > > What was not committed is the aggressive pre-population of the phys objects > mem queue, and a knob to further split NUMA domains into smaller domains. > The later change is rotten. > > In fact, I think that with that load, what you would see right now on > HEAD, is the contention on vm_page_queue_free_mtx. There are plans to > handle it. Thanks for the update. Is it still recommended to enable the multithreaded pagedaemon?Received on Fri Jun 03 2016 - 15:29:15 UTC
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