diff options
| author | Zi Yan <ziy@nvidia.com> | 2024-07-24 09:01:14 -0400 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-09-01 20:25:47 -0700 |
| commit | 2a28713a67fd28eedc13b32300df6b9c5a2381f5 (patch) | |
| tree | b99b41c1317c28193490fe09ecbb5863edd34140 /include | |
| parent | memory tiering: read last_cpupid correctly in do_huge_pmd_numa_page() (diff) | |
| download | linux-2a28713a67fd28eedc13b32300df6b9c5a2381f5.tar.gz linux-2a28713a67fd28eedc13b32300df6b9c5a2381f5.zip | |
memory tiering: introduce folio_use_access_time() check
If memory tiering mode is on and a folio is not in the top tier memory,
folio's cpupid field is repurposed to store page access time. Instead of
an open coded check, use a function to encapsulate the check.
Link: https://lkml.kernel.org/r/20240724130115.793641-3-ziy@nvidia.com
Signed-off-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: "Huang, Ying" <ying.huang@intel.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mm.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 6549d0979b28..6c2078ca3391 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1745,6 +1745,8 @@ static inline void vma_set_access_pid_bit(struct vm_area_struct *vma) __set_bit(pid_bit, &vma->numab_state->pids_active[1]); } } + +bool folio_use_access_time(struct folio *folio); #else /* !CONFIG_NUMA_BALANCING */ static inline int folio_xchg_last_cpupid(struct folio *folio, int cpupid) { @@ -1798,6 +1800,10 @@ static inline bool cpupid_match_pid(struct task_struct *task, int cpupid) static inline void vma_set_access_pid_bit(struct vm_area_struct *vma) { } +static inline bool folio_use_access_time(struct folio *folio) +{ + return false; +} #endif /* CONFIG_NUMA_BALANCING */ #if defined(CONFIG_KASAN_SW_TAGS) || defined(CONFIG_KASAN_HW_TAGS) |