[PATCH] Allow a larger buffer for writes to cpuset files

[Paul Menage]

When using fake NUMA setup, the number of memory nodes can greatly
exceed the number of CPUs. So the current limit in
cpuset_common_file_write() is insufficient. PAGE_SIZE is still a bit
of an arbitrary limit, but gives more breathing room.

Signed-off-by: Paul Menage <menage@xxxxxxxxxx>

--- 2.6.19-rc2.orig/kernel/cpuset.c
+++ 2.6.19-rc2/kernel/cpuset.c
@@ -1292,7 +1292,7 @@ static ssize_t cpuset_common_file_write(
	int retval = 0;

	/* Crude upper limit on largest legitimate cpulist user might write. */
-	if (nbytes > 100 + 6 * NR_CPUS)
+	if (nbytes >= PAGE_SIZE)
		return -E2BIG;

	/* +1 for nul-terminator */
-
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