On Wed, 2017-03-08 at 15:26 +0800, Huang, Ying wrote: > From: Huang Ying <ying.hu...@intel.com> > > This patch make it possible to charge or uncharge a set of continuous > swap entries in the swap cgroup. The number of swap entries is > specified via an added parameter. > > This will be used for the THP (Transparent Huge Page) swap support. > Where a swap cluster backing a THP may be allocated and freed as a > whole. So a set of (HPAGE_PMD_NR) continuous swap entries backing one > THP need to be charged or uncharged together. This will batch the > cgroup operations for the THP swap too.
A quick look at the patches makes it look sane. I wonder if we would make sense to track THP swapout separately as well (from a memory.stat perspective) Balbir Singh
