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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>
This commit is contained in:
Wanpeng Li 2013-07-04 08:33:24 +08:00 committed by Pekka Enberg
parent e25839f679
commit e9b4db2b8d
1 changed files with 9 additions and 1 deletions
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10
mm/slab_common.c
View File

@ -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);