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authorWanpeng Li <liwanp@linux.vnet.ibm.com>2013-07-04 08:33:24 +0800
committerPekka Enberg <penberg@kernel.org>2013-07-07 18:37:47 +0300
commite9b4db2b8dba6b6c666e54b20ce46f3e597a6d96 (patch)
tree1e9862619ecbca7695558280bbd02637b1fea421 /mm
parente25839f67948ca54fa55a45686d72c266f65f099 (diff)
mm/slab: Fix /proc/slabinfo unwriteable for slab
Slab have some tunables like limit, batchcount, and sharedfactor can be tuned through function slabinfo_write. Commit (b7454ad3: mm/sl[au]b: Move slabinfo processing to slab_common.c) uncorrectly change /proc/slabinfo unwriteable for slab, this patch fix it by revert to original mode. Acked-by: Christoph Lameter <cl@linux.com> Signed-off-by: Wanpeng Li <liwanp@linux.vnet.ibm.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/slab_common.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/mm/slab_common.c b/mm/slab_common.c
index 68518eb67229..13ae037c71d4 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -495,6 +495,13 @@ void __init create_kmalloc_caches(unsigned long flags)
#ifdef CONFIG_SLABINFO
+
+#ifdef CONFIG_SLAB
+#define SLABINFO_RIGHTS (S_IWUSR | S_IRUSR)
+#else
+#define SLABINFO_RIGHTS S_IRUSR
+#endif
+
void print_slabinfo_header(struct seq_file *m)
{
/*
@@ -631,7 +638,8 @@ static const struct file_operations proc_slabinfo_operations = {
static int __init slab_proc_init(void)
{
- proc_create("slabinfo", S_IRUSR, NULL, &proc_slabinfo_operations);
+ proc_create("slabinfo", SLABINFO_RIGHTS, NULL,
+ &proc_slabinfo_operations);
return 0;
}
module_init(slab_proc_init);