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authorPaul Menage <menage@google.com>2006-12-06 20:41:37 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-07 08:39:48 -0800
commitd3ed11c35635487d34ad476e1d6a66dd298ab2de (patch)
tree1317e066282dda6b9d4ee44b4f62bfee94625ee1 /kernel/cpuset.c
parent09b882520bbe01f2e5044642109c1c1d19fe3559 (diff)
downloadop-kernel-dev-d3ed11c35635487d34ad476e1d6a66dd298ab2de.zip
op-kernel-dev-d3ed11c35635487d34ad476e1d6a66dd298ab2de.tar.gz
[PATCH] cpuset: allow a larger buffer for writes to cpuset files
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. Signed-off-by: Paul Menage <menage@google.com> Acked-by: Paul Jackson <pj@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/cpuset.c')
-rw-r--r--kernel/cpuset.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 4ef1d29..0a6b4d8 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -1280,7 +1280,8 @@ typedef enum {
FILE_TASKLIST,
} cpuset_filetype_t;
-static ssize_t cpuset_common_file_write(struct file *file, const char __user *userbuf,
+static ssize_t cpuset_common_file_write(struct file *file,
+ const char __user *userbuf,
size_t nbytes, loff_t *unused_ppos)
{
struct cpuset *cs = __d_cs(file->f_dentry->d_parent);
@@ -1291,7 +1292,7 @@ static ssize_t cpuset_common_file_write(struct file *file, const char __user *us
int retval = 0;
/* Crude upper limit on largest legitimate cpulist user might write. */
- if (nbytes > 100 + 6 * NR_CPUS)
+ if (nbytes > 100 + 6 * max(NR_CPUS, MAX_NUMNODES))
return -E2BIG;
/* +1 for nul-terminator */
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