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[v1,0/4] mm/mempolicy: some fix and semantics cleanup

Message ID 1622005302-23027-1-git-send-email-feng.tang@intel.com (mailing list archive)
Headers show
Series mm/mempolicy: some fix and semantics cleanup | expand

Message

Feng Tang May 26, 2021, 5:01 a.m. UTC 
Hi All,

We've posted v4 patchset introducing a new "perfer-many" memory policy
https://lore.kernel.org/lkml/1615952410-36895-1-git-send-email-feng.tang@intel.com/ ,
for which Michal Hocko gave many comments while pointing out some
problems, and we also found some semantics confusion about 'prefer'
and 'local' policy, as well as some duplicated code. This patchset
tries to address them. Please help to review, thanks!

The patchset has been run with some sanity test like 'stress-ng'
and 'ltp', and no problem found.

- Feng

Changelogs:

    v1:
      * use helper func instead of macro for patch 2/4 (David Rientjes)
      * fix a possible null pointer case in patch 3/4 		
      * update commit log for 1/4
      
    RFC v2:
      * add for oom check fix patch 1/4
      * add the unification patch for mpol preprocess 2/4

Feng Tang (4):
  mm/mempolicy: skip nodemask intersect check for 'interleave' when oom
  mm/mempolicy: unify the preprocessing for mbind and set_mempolicy
  mm/mempolicy: don't handle MPOL_LOCAL like a fake MPOL_PREFERRED
    policy
  mm/mempolicy: kill MPOL_F_LOCAL bit

 include/uapi/linux/mempolicy.h |   1 +
 mm/mempolicy.c                 | 208 +++++++++++++++++++++--------------------
 2 files changed, 109 insertions(+), 100 deletions(-)