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mount -t tmpfs -o mpol=: check nodes online

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Randy Dunlap reports that a tmpfs, mounted with NUMA mpol= specifying an
offline node, crashes as soon as data is allocated upon it.  Now restrict it
to online nodes, where before it restricted to MAX_NUMNODES.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: Robin Holt <holt@sgi.com>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Andi Kleen <ak@suse.de>
Tested-and-acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Hugh Dickins
2007-06-08 13:46:46 -07:00
committed by Linus Torvalds
parent 9739ed1c8e
commit a210906c1b
2 changed files with 7 additions and 5 deletions
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2
mm/shmem.c
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@ -967,6 +967,8 @@ static inline int shmem_parse_mpol(char *value, int *policy, nodemask_t *policy_
*nodelist++ = '\0';
if (nodelist_parse(nodelist, *policy_nodes))
goto out;
if (!nodes_subset(*policy_nodes, node_online_map))
goto out;
}
if (!strcmp(value, "default")) {
*policy = MPOL_DEFAULT;