On Fri 21-10-16 18:00:07, Kirill A. Shutemov wrote: > On Fri, Oct 21, 2016 at 04:01:18PM +1100, Dave Chinner wrote: [...] > > None of these aspects can be optimised sanely by a single threshold, > > especially when considering the combination of access patterns vs file > > layout. > > I agree. > > Here I tried to address the particular performance regression I see with > huge pages enabled on tmpfs. It doesn't mean to fix all possible issues. So can we start simple and use huge pages on shmem mappings only when they are larger than the huge page? Without any tunable which might turn out to be misleading/wrong later on. If I understand Dave's comments it is really not all that clear that a mount option makes sense. I cannot comment on those but they clearly show that there are multiple points of view here. -- 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>