On 05/02/2016 08:01 AM, Kirill A. Shutemov wrote: > On Mon, May 02, 2016 at 04:39:35PM +0200, Vlastimil Babka wrote: >> On 04/27/2016 07:11 PM, Dave Hansen wrote: >>> 6. Perhaps don't use the LRU pagevecs for large pages. It limits the >>> severity of the problem. >> >> I think that makes sense. Being large already amortizes the cost per base >> page much more than pagevecs do (512 vs ~22 pages?). > > We try to do this already, don't we? Any spefic case where we have THPs on > pagevecs?
Lukas was hitting this on a RHEL 7 era kernel. In his kernel at least, I'm pretty sure THP's were ending up on pagevecs. Are you saying you don't think we're doing that any more?
