On Wed, 15 Nov 2017, Roman Gushchin wrote: > Currently we display some hugepage statistics (total, free, etc) > in /proc/meminfo, but only for default hugepage size (e.g. 2Mb). > > If hugepages of different sizes are used (like 2Mb and 1Gb on x86-64), > /proc/meminfo output can be confusing, as non-default sized hugepages > are not reflected at all, and there are no signs that they are > existing and consuming system memory. > > To solve this problem, let's display the total amount of memory, > consumed by hugetlb pages of all sized (both free and used). > Let's call it "Hugetlb", and display size in kB to match generic > /proc/meminfo style. > > For example, (1024 2Mb pages and 2 1Gb pages are pre-allocated): > $ cat /proc/meminfo > MemTotal: 8168984 kB > MemFree: 3789276 kB > <...> > CmaFree: 0 kB > HugePages_Total: 1024 > HugePages_Free: 1024 > HugePages_Rsvd: 0 > HugePages_Surp: 0 > Hugepagesize: 2048 kB > Hugetlb: 4194304 kB > DirectMap4k: 32632 kB > DirectMap2M: 4161536 kB > DirectMap1G: 6291456 kB > > Also, this patch updates corresponding docs to reflect > Hugetlb entry meaning and difference between Hugetlb and > HugePages_Total * Hugepagesize. > > Signed-off-by: Roman Gushchin <[email protected]> > Cc: Andrew Morton <[email protected]> > Cc: Michal Hocko <[email protected]> > Cc: Johannes Weiner <[email protected]> > Cc: Mike Kravetz <[email protected]> > Cc: "Aneesh Kumar K.V" <[email protected]> > Cc: Andrea Arcangeli <[email protected]> > Cc: Dave Hansen <[email protected]> > Cc: David Rientjes <[email protected]> > Cc: [email protected] > Cc: [email protected] > Cc: [email protected]
Acked-by: David Rientjes <[email protected]> Nice!
