On Fri, 21 Jun 2024 15:00:50 -0400 Aristeu Rozanski <aris@xxxxxxxxxx> wrote: > allowed_mems_nr() only accounts for the number of free hugepages in the nodes > the current process belongs to. In case one or more of the requested surplus > hugepages are allocated in a different node, the whole allocation will fail due > allowed_mems_nr() returning a lower value. > > So allocate surplus hugepages in one of the nodes the current process belongs to. > > Easy way to reproduce this issue is to use a 2+ NUMA nodes system: > > # echo 0 >/proc/sys/vm/nr_hugepages > # echo 1 >/proc/sys/vm/nr_overcommit_hugepages > # numactl -m0 ./tools/testing/selftests/mm/map_hugetlb 2 > > will eventually fail when the hugepage ends up allocated in a different node. > Should we backport this into -stable kernels?
