diff options
| author | Baolin Wang <baolin.wang@linux.alibaba.com> | 2022-08-17 16:14:08 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-09-26 19:46:07 -0700 |
| commit | 7047b5a40bce74883a10549bd609643b8bc4a3fb (patch) | |
| tree | afaa61add7d0c9d531420713a97ae8b5ce2b5a35 /kernel/delayacct.c | |
| parent | 077309bc1eb8f41dd414902634c212606008bd54 (diff) | |
mm: migrate: do not retry 10 times for the subpages of fail-to-migrate THP
If THP is failed to migrate due to -ENOSYS or -ENOMEM case, the THP will
be split, and the subpages of fail-to-migrate THP will be tried to migrate
again, so we should not account the retry counter in the second loop,
since we already accounted 'nr_thp_failed' in the first loop.
Moreover we also do not need retry 10 times for -EAGAIN case for the
subpages of fail-to-migrate THP in the second loop, since we already
regarded the THP as migration failure, and save some migration time (for
the worst case, will try 512 * 10 times) according to previous discussion
[1].
[1] https://lore.kernel.org/linux-mm/87r13a7n04.fsf@yhuang6-desk2.ccr.corp.intel.com/
Link: https://lkml.kernel.org/r/20220817081408.513338-9-ying.huang@intel.com
Tested-by: "Huang, Ying" <ying.huang@intel.com>
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Signed-off-by: "Huang, Ying" <ying.huang@intel.com>
Cc: 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 'kernel/delayacct.c')
0 files changed, 0 insertions, 0 deletions