Messages in this thread | | | From | Pasha Tatashin <> | Date | Wed, 27 Oct 2021 14:22:58 -0400 | Subject | Re: [RFC 1/8] mm: add overflow and underflow checks for page->_refcount |
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On Tue, Oct 26, 2021 at 11:05 PM Matthew Wilcox <willy@infradead.org> 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
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