diff options
| author |   Zi Yan <ziy@nvidia.com> | 2024-07-24 09:01:13 -0400 |
|---|---|---|
| committer |   Andrew Morton <akpm@linux-foundation.org> | 2024-09-01 20:25:47 -0700 |
| commit | 3eb2091c653480e02e9c2a114c4725ec654bca63 (patch) | |
| tree | d9797154e8e7bc41ee42a8cfd8065d7d0b045ac0 /mm/mprotect.c | |
| parent | mm: extend 'usage' parameter so that cluster_swap_free_nr() can be reused (diff) | |
| download | wireguard-linux-3eb2091c653480e02e9c2a114c4725ec654bca63.tar.xz wireguard-linux-3eb2091c653480e02e9c2a114c4725ec654bca63.zip | |
memory tiering: read last_cpupid correctly in do_huge_pmd_numa_page()
Patch series "Various memory tiering fixes", v3.
This patch (of 3):
last_cpupid is only available when memory tiering is off or the folio is
in toptier node. Complete the check to read last_cpupid when it is
available.
Before the fix, the default last_cpupid will be used even if memory
tiering mode is turned off at runtime instead of the actual value. This
can prevent task_numa_fault() from getting right numa fault stats, but
should not cause any crash. User might see performance changes after the
fix.
Link: https://lkml.kernel.org/r/20240724130115.793641-1-ziy@nvidia.com
Link: https://lkml.kernel.org/r/20240724130115.793641-2-ziy@nvidia.com
Fixes: 33024536bafd ("memory tiering: hot page selection with hint page fault latency")
Signed-off-by: Zi Yan <ziy@nvidia.com>
Reported-by: David Hildenbrand <david@redhat.com>
Closes: https://lore.kernel.org/linux-mm/9af34a6b-ca56-4a64-8aa6-ade65f109288@redhat.com/
Reviewed-by: "Huang, Ying" <ying.huang@intel.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/mprotect.c')
0 files changed, 0 insertions, 0 deletions