On Tue, Oct 26, 2021 at 11:05 PM Matthew Wilcox <willy@xxxxxxxxxxxxx> wrote: > > On Tue, Oct 26, 2021 at 09:21:29PM -0400, Pasha Tatashin wrote: > > I think we can do that by using: > > atomic_fetch_*() and check for overflow/underflow after operation. I > > will send the updated series soon. > > Please include performance measurements. You're adding code to some hot > paths. I will do boot performance tests to ensure we do not regress initializing "struct pages" on larger machines. Do you have a suggestion for another perf test? Thanks, Pasha
