diff options
| author | David Hildenbrand <david@redhat.com> | 2024-04-18 18:18:34 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-05-06 03:53:42 +0300 |
| commit | d21f996b02a027f8915e493ee01370c4610ed2e2 (patch) | |
| tree | 88bfda9cefa101afaae1fdf9a28eaac3551fc3f8 /init/calibrate.c | |
| parent | 8430557fc584657559bfbd5150b6ae1bb90f35a0 (diff) | |
| download | linux-d21f996b02a027f8915e493ee01370c4610ed2e2.tar.xz | |
mm/huge_memory: improve split_huge_page_to_list_to_order() return value documentation
The documentation is wrong and relying on it almost resulted in BUGs in
new callers: ever since fd4a7ac32918 ("mm: migrate: try again if THP split
is failed due to page refcnt") we return -EAGAIN on unexpected folio
references, not -EBUSY.
Let's fix that and also document which other return values we can
currently see and why they could happen.
[david@redhat.com: v2]
Link: https://lkml.kernel.org/r/20240422194217.442933-1-david@redhat.com
Link: https://lkml.kernel.org/r/20240418151834.216557-1-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'init/calibrate.c')
0 files changed, 0 insertions, 0 deletions