On Tue, Oct 26, 2021 at 11:05 PM Matthew Wilcox [off-list ref] wrote:

On Tue, Oct 26, 2021 at 09:21:29PM -0400, Pasha Tatashin wrote:

quoted

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