Kernel/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-12-29 17:25:38 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

docs: hugetlbpage.rst: add hugetlb migration description

Browse Source 
Add some description of the hugetlb migration strategy.

Link: https://lkml.kernel.org/r/63fb16e7a4ebc5cb69ce655af86e29b2d8e9ba34.1709719720.git.baolin.wang@linux.alibaba.com
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Cc: David Hildenbrand <david@redhat.com>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Baolin Wang 2024-03-06 18:13:28 +08:00 committed by Andrew Morton
parent 42d0c3fbb5
commit 353dc18784
1 changed files with 7 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
Documentation/admin-guide/mm/hugetlbpage.rst
View File

@ -376,6 +376,13 @@ Note that the number of overcommit and reserve pages remain global quantities,
as we don't know until fault time, when the faulting task's mempolicy is
applied, from which node the huge page allocation will be attempted.
The hugetlb may be migrated between the per-node hugepages pool in the following
scenarios: memory offline, memory failure, longterm pinning, syscalls(mbind,
migrate_pages and move_pages), alloc_contig_range() and alloc_contig_pages().
Now only memory offline, memory failure and syscalls allow fallbacking to allocate
a new hugetlb on a different node if the current node is unable to allocate during
hugetlb migration, that means these 3 cases can break the per-node hugepages pool.
.. _using_huge_pages:
Using Huge Pages