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| author |   Huang Ying <ying.huang@intel.com> | 2022-08-17 16:14:03 +0800 |
|---|---|---|
| committer |   Andrew Morton <akpm@linux-foundation.org> | 2022-09-26 19:46:06 -0700 |
| commit | fbed53b47770b978be290cec0f4f22577766c12d (patch) | |
| tree | 8fc63101ae1ec85cc074b873d3f424148351d520 /include/linux/sched.h | |
| parent | migrate_pages(): remove unnecessary list_safe_reset_next() (diff) | |
| download | wireguard-linux-fbed53b47770b978be290cec0f4f22577766c12d.tar.xz wireguard-linux-fbed53b47770b978be290cec0f4f22577766c12d.zip | |
migrate_pages(): fix THP failure counting for -ENOMEM
In unmap_and_move(), if the new THP cannot be allocated, -ENOMEM will be
returned, and migrate_pages() will try to split the THP unless "reason" is
MR_NUMA_MISPLACED (that is, nosplit == true). But when nosplit == true,
the THP migration failure will not be counted.
This is incorrect, so in this patch, the THP migration failure will be
counted for -ENOMEM regardless of nosplit is true or false. The nr_failed
counting isn't fixed because it's not used. Added some comments for it
per Baolin's suggestion.
Link: https://lkml.kernel.org/r/20220817081408.513338-4-ying.huang@intel.com
Fixes: 5984fabb6e82 ("mm: move_pages: report the number of non-attempted pages")
Signed-off-by: "Huang, Ying" <ying.huang@intel.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Cc: Zi Yan <ziy@nvidia.com>
Cc: Yang Shi <shy828301@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/sched.h')
0 files changed, 0 insertions, 0 deletions