| Message ID | 20200118224754.ufg_j%akpm@linux-foundation.org |
|---|---|
| State | New |
| Headers | show |
| Series | + mm-move_pages-fix-the-return-value-if-there-are-not-migrated-pages.patch added to -mm tree | expand |
--- a/mm/migrate.c~mm-move_pages-fix-the-return-value-if-there-are-not-migrated-pages +++ a/mm/migrate.c @@ -1659,8 +1659,11 @@ static int do_pages_move(struct mm_struc goto out_flush; err = do_move_pages_to_node(mm, &pagelist, current_node); - if (err) + if (err) { + if (err > 0) + err = 0; goto out; + } if (i > start) { err = store_status(status, start, current_node, i - start); if (err)
The patch titled Subject: mm/migrate.c: move_pages: fix the return value if there are not-migrated pages has been added to the -mm tree. Its filename is mm-move_pages-fix-the-return-value-if-there-are-not-migrated-pages.patch This patch should soon appear at http://ozlabs.org/~akpm/mmots/broken-out/mm-move_pages-fix-the-return-value-if-there-are-not-migrated-pages.patch and later at http://ozlabs.org/~akpm/mmotm/broken-out/mm-move_pages-fix-the-return-value-if-there-are-not-migrated-pages.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Yang Shi <yang.shi@linux.alibaba.com> Subject: mm/migrate.c: move_pages: fix the return value if there are not-migrated pages do_move_pages_to_node() might return > 0 value, the number of pages that are not migrated, then the value will be returned to userspace directly. But, move_pages() syscall would just return 0 or errno. So, we need reset the return value to 0 for such case as pre-v4.17 did. Link: http://lkml.kernel.org/r/1579325203-16405-1-git-send-email-yang.shi@linux.alibaba.com Fixes: a49bd4d71637 ("mm, numa: rework do_pages_move") Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Wei Yang <richardw.yang@linux.intel.com> Cc: <stable@vger.kernel.org> [4.17+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> --- mm/migrate.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)