On Tue, 6 Dec 2016, Dave Hansen wrote: > On 12/06/2016 09:19 AM, Kirill A. Shutemov wrote: > >>> > > We have in /proc/meminfo > >>> > > > >>> > > Hugepagesize: 2048 kB > >>> > > > >>> > > Does it makes it easy for application to find THP page size also there ? > >> > > >> > Nope. That's the default hugetlbfs page size. Even on x86, that can be > >> > changed and _could_ be 1G. If hugetlbfs is configured out, you also > >> > won't get this in meminfo. > > I think Aneesh propose to add one more line into the file. > > Ahhh, ok... > > Personally, I think Hugh did the right things. There's no reason to > waste cycles sticking a number in meminfo that never changes. Thanks, yes, that was my feeling: I prefer not to clutter /proc/meminfo with constants - especially not a unit, or granularity, as this is (too late to stop Hugepagesize of course, but I wish it weren't there, and those HugePages_ numbers in kB). On top of that, /proc/meminfo is the mm admin's "front page", whereas this is a low-level detail: it somewhat goes against our claim of "transparent" hugepages to post it up there, even though a few tests etc may find the value useful: I'd rather bury it among the tunables. (My guess is that Andrea felt rather the same, in choosing not to publish it six years ago.) But of course, that's just my/our opinion: any strong preferences? Hugh -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>