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| author | Rik van Riel <riel@redhat.com> | 2013-10-07 11:29:34 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-10-09 14:48:12 +0200 |
| commit | dabe1d992414a6456e60e41f1d1ad8affc6d444d (patch) | |
| tree | 213b65fbc7864687d0ea9db96d7e768b6ff587cf /mm/mmu_context.c | |
| parent | 0ec8aa00f2b4dc457836ef4e2662b02483e94fb7 (diff) | |
| download | blackbird-op-linux-dabe1d992414a6456e60e41f1d1ad8affc6d444d.tar.gz blackbird-op-linux-dabe1d992414a6456e60e41f1d1ad8affc6d444d.zip | |
sched/numa: Be more careful about joining numa groups
Due to the way the pid is truncated, and tasks are moved between
CPUs by the scheduler, it is possible for the current task_numa_fault
to group together tasks that do not actually share memory together.
This patch adds a few easy sanity checks to task_numa_fault, joining
tasks together if they share the same tsk->mm, or if the fault was on
a page with an elevated mapcount, in a shared VMA.
Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1381141781-10992-57-git-send-email-mgorman@suse.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'mm/mmu_context.c')
0 files changed, 0 insertions, 0 deletions
