On Thu 16-06-16 15:27:35, Kirill A. Shutemov wrote: > 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@xxxxxxxxxxxxxxxxxx But those numbers cannot explain the regression completely AFAIU. It smells like something else is going on. Anyway, as I've said I do not have anything against the revert just more than "unixbench regresses" would be nice. -- Michal Hocko SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>