On Fri 24-09-21 14:46:22, brookxu wrote: > From: Chunguang Xu <brookxu@xxxxxxxxxxx> > > In order to track inflight foreign writeback, we init > wb_completion.cnt to 1. For normal writeback, this cause > wb_wait_for_completion() to perform meaningless atomic > operations. Since foreign writebacks rarely occur in most > scenarios, we can init wb_completion.cnt to 0 and set > frn.done.cnt to 1. In this way we can avoid unnecessary > atomic operations. Does this lead to any measurable differences? -- Michal Hocko SUSE Labs
