| Date | Tue, 25 Jul 2017 14:29:25 -0400 | From | Josef Bacik <> | Subject | Re: [PATCH v2 11/23] percpu: introduce nr_empty_pop_pages to help empty page accounting |
| |
On Mon, Jul 24, 2017 at 07:02:08PM -0400, Dennis Zhou wrote: > From: "Dennis Zhou (Facebook)" <dennisszhou@gmail.com> > > pcpu_nr_empty_pop_pages is used to ensure there are a handful of free > pages around to serve atomic allocations. A new field, nr_empty_pop_pages, > is added to the pcpu_chunk struct to keep track of the number of empty > pages. This field is needed as the number of empty populated pages is > globally tracked and deltas are used to update in the bitmap allocator. > Pages that contain a hidden area are not considered to be empty. This > new field is exposed in percpu_stats. > > Signed-off-by: Dennis Zhou <dennisszhou@gmail.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Thanks,
Josef
|