diff options
| author | Ben Widawsky <ben.widawsky@intel.com> | 2021-07-01 04:51:10 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-07-01 06:47:29 +0300 |
| commit | 269fbe72cded0afce0090103e90d2ae8ef8ac5b5 (patch) | |
| tree | 973915e7a95545f25686bb288947ad590d839c00 /include/linux/mempolicy.h | |
| parent | e5947d23edd897ffe068564e91fd186adb95ee6d (diff) | |
| download | linux-269fbe72cded0afce0090103e90d2ae8ef8ac5b5.tar.xz | |
mm/mempolicy: use unified 'nodes' for bind/interleave/prefer policies
Current structure 'mempolicy' uses a union to store the node info for
bind/interleave/perfer policies.
union {
short preferred_node; /* preferred */
nodemask_t nodes; /* interleave/bind */
/* undefined for default */
} v;
Since preferred node can also be represented by a nodemask_t with only ont
bit set, unify these policies with using one nodemask_t 'nodes', which can
remove a union, simplify the code and make it easier to support future's
new policy's node info.
Link: https://lore.kernel.org/r/20200630212517.308045-7-ben.widawsky@intel.com
Link: https://lkml.kernel.org/r/1623399825-75651-1-git-send-email-feng.tang@intel.com
Co-developed-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Ben Widawsky <ben.widawsky@intel.com>
Signed-off-by: Feng Tang <feng.tang@intel.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Andi Kleen <ak@linux.intel.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 | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/include/linux/mempolicy.h b/include/linux/mempolicy.h index 8773c55c7744..0aaf91b496e2 100644 --- a/include/linux/mempolicy.h +++ b/include/linux/mempolicy.h @@ -46,11 +46,8 @@ struct mempolicy { atomic_t refcnt; unsigned short mode; /* See MPOL_* above */ unsigned short flags; /* See set_mempolicy() MPOL_F_* above */ - union { - short preferred_node; /* preferred */ - nodemask_t nodes; /* interleave/bind */ - /* undefined for default */ - } v; + nodemask_t nodes; /* interleave/bind/perfer */ + union { nodemask_t cpuset_mems_allowed; /* relative to these nodes */ nodemask_t user_nodemask; /* nodemask passed by user */ |