Messages in this thread | | | Date | Thu, 16 Jun 2016 15:27:35 +0300 | From | "Kirill A. Shutemov" <> | Subject | Re: [PATCH 1/2] Revert "mm: make faultaround produce old ptes" |
| |
On Thu, Jun 16, 2016 at 02:20:02PM +0200, Michal Hocko wrote: > On Tue 14-06-16 11:42:29, Kirill A. Shutemov wrote: > > This reverts commit 5c0a85fad949212b3e059692deecdeed74ae7ec7. > > > > The commit causes ~6% regression in unixbench. > > Is the regression fully explained? My understanding from the email > thread is that this is suspiciously too high. It is not like I would > be against the revert but having an explanation would be really > appreciated.
My understanding is that it's overhead on setting accessed bit:
http://lkml.kernel.org/r/20160613125248.GA30109@black.fi.intel.com
-- Kirill A. Shutemov
| |