[lkml]   [2021]   [Feb]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH RFC] mm/madvise: introduce MADV_POPULATE to prefault/prealloc memory
I am slowly catching up with this thread.

On Fri 19-02-21 09:20:16, David Hildenbrand wrote:
> So if we have zero, we write zero. We'll COW pages, triggering a write fault
> - and that's the only good thing about it. For example, similar to
> MADV_POPULATE, nothing stops KSM from merging anonymous pages again. So for
> anonymous memory the actual write is not helpful at all. Similarly for
> hugetlbfs, the actual write is not necessary - but there is no other way to
> really achieve the goal.

I really do not see why you care about KSM so much. Isn't KSM an
explicit opt-in with a fine grained interface to control which memory to
KSM or not?
Michal Hocko

 \ /
  Last update: 2021-02-22 14:58    [W:0.080 / U:17.828 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site