diff options
| author | Ben Widawsky <ben.widawsky@intel.com> | 2021-09-02 15:00:13 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-09-03 09:58:17 -0700 |
| commit | cfcaa66f803233c50e17239469f6c96136a673a1 (patch) | |
| tree | bcc02599ee9e3653f7a568858fe54d6b6be527a7 /include/linux/mempolicy.h | |
| parent | 4c54d94908e089e9741513797eac30a8b8217034 (diff) | |
mm/hugetlb: add support for mempolicy MPOL_PREFERRED_MANY
Implement the missing huge page allocation functionality while obeying the
preferred node semantics. This is similar to the implementation for
general page allocation, as it uses a fallback mechanism to try multiple
preferred nodes first, and then all other nodes.
To avoid adding too many "#ifdef CONFIG_NUMA" check, add a helper function
in mempolicy.h to check whether a mempolicy is MPOL_PREFERRED_MANY.
[akpm@linux-foundation.org: fix compiling issue when merging with other hugetlb patch]
[Thanks to 0day bot for catching the !CONFIG_NUMA compiling issue]
[mhocko@suse.com: suggest to remove the #ifdef CONFIG_NUMA check]
[ben.widawsky@intel.com: add helpers to avoid ifdefs]
Link: https://lore.kernel.org/r/20200630212517.308045-12-ben.widawsky@intel.com
Link: https://lkml.kernel.org/r/1627970362-61305-4-git-send-email-feng.tang@intel.com
Link: https://lkml.kernel.org/r/20210809024430.GA46432@shbuild999.sh.intel.com
[nathan@kernel.org: initialize page to NULL in alloc_buddy_huge_page_with_mpol()]
Link: https://lkml.kernel.org/r/20210810200632.3812797-1-nathan@kernel.org
Link: https://lore.kernel.org/r/20200630212517.308045-12-ben.widawsky@intel.com
Link: https://lkml.kernel.org/r/1627970362-61305-4-git-send-email-feng.tang@intel.com
Link: https://lkml.kernel.org/r/20210809024430.GA46432@shbuild999.sh.intel.com
Signed-off-by: Ben Widawsky <ben.widawsky@intel.com>
Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Co-developed-by: Feng Tang <feng.tang@intel.com>
Suggested-by: Michal Hocko <mhocko@suse.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/mempolicy.h')
| -rw-r--r-- | include/linux/mempolicy.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/mempolicy.h b/include/linux/mempolicy.h index 4ca025e2a77e..4091692bed8c 100644 --- a/include/linux/mempolicy.h +++ b/include/linux/mempolicy.h @@ -186,6 +186,12 @@ extern void mpol_put_task_policy(struct task_struct *); extern bool numa_demotion_enabled; +static inline bool mpol_is_preferred_many(struct mempolicy *pol) +{ + return (pol->mode == MPOL_PREFERRED_MANY); +} + + #else struct mempolicy {}; @@ -296,5 +302,11 @@ static inline nodemask_t *policy_nodemask_current(gfp_t gfp) } #define numa_demotion_enabled false + +static inline bool mpol_is_preferred_many(struct mempolicy *pol) +{ + return false; +} + #endif /* CONFIG_NUMA */ #endif |