Excerpts from Andrew Morton's message of August 22, 2020 6:07 am: > On Sat, 22 Aug 2020 01:12:05 +1000 Nicholas Piggin <npiggin@xxxxxxxxx> wrote: > >> vmalloc_to_page returns NULL for addresses mapped by larger pages[*]. >> Whether or not a vmap is huge depends on the architecture details, >> alignments, boot options, etc., which the caller can not be expected >> to know. Therefore HUGE_VMAP is a regression for vmalloc_to_page. > > I assume this doesn't matter in current mainline? > If wrong, then what are the user-visible effects and why no cc:stable? I haven't heard any reports, but in theory it could cause a prolem. The commit 029c54b095995 from the changelog was made to paper over it. But that was fixed properly afterward I think by 737326aa510b. Not sure of the user visible problems currently. I think generally you wouldn't do vmalloc_to_page() on ioremap() memory, so maybe callilng it a regression is a bit strong. _Technically_ a regression, maybe. Thanks, Nick
