On 29 Jun 2020, at 11:19, Matthew Wilcox (Oracle) wrote: > PG_private_2 is defined as being PF_ANY (applicable to tail pages > as well as regular & head pages). That means that the first tail > page of a double-map page will appear to have Private2 set. Use the > Workingset bit instead which is defined as PF_HEAD so any attempt to > access the Workingset bit on a tail page will redirect to the head page's > Workingset bit. > > Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> Makes sense to me. Reviewed-by: Zi Yan <ziy@xxxxxxxxxx> — Best Regards, Yan Zi
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