As a result of commit 5606e3877ad8 ("mm: numa: Migrate on reference
policy"), /proc/<pid>/numa_maps prints the mempolicy for any <pid> as
"prefer:N" for the local node, N, of the process reading the file.
This should only be printed when the mempolicy of <pid> is MPOL_PREFERRED
for node N.
If the process is actually only using the default mempolicy for local node
allocation, make sure "default" is printed as expected.
Reported-by: Robert Lippert <rlipp...@google.com>
Signed-off-by: David Rientjes <rient...@google.com>
---
This affects all 3.7+ kernels and is intended for stable but will need to
be rebased after it's merged since mpol_to_str() has subsequently
changed. I'll rebase and propose it separately.
mm/mempolicy.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -2926,7 +2926,7 @@ void mpol_to_str(char *buffer, int maxlen, struct
mempolicy *pol)
unsigned short mode = MPOL_DEFAULT;
unsigned short flags = 0;
- if (pol && pol != &default_policy) {
+ if (pol && pol != &default_policy && !(pol->flags & MPOL_F_MORON)) {
mode = pol->mode;
flags = pol->flags;
}
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