module: struct module_ref should contains long fields
module_ref contains two "unsigned int" fields.
Thats now too small, since some machines can open more than 2^32 files.
Check commit 518de9b39e8 (fs: allow for more than 2^31 files) for
reference.
We can add an aligned(2 * sizeof(unsigned long)) attribute to force
alloc_percpu() allocating module_ref areas in single cache lines.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Rusty Russell <rusty@rustcorp.com.au>
CC: Tejun Heo <tj@kernel.org>
CC: Robin Holt <holt@sgi.com>
CC: David Miller <davem@davemloft.net>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
diff --git a/kernel/module.c b/kernel/module.c
index 4928cffc..14b8e82 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -725,9 +725,9 @@
}
}
-unsigned int module_refcount(struct module *mod)
+unsigned long module_refcount(struct module *mod)
{
- unsigned int incs = 0, decs = 0;
+ unsigned long incs = 0, decs = 0;
int cpu;
for_each_possible_cpu(cpu)
@@ -853,7 +853,7 @@
struct module_use *use;
int printed_something = 0;
- seq_printf(m, " %u ", module_refcount(mod));
+ seq_printf(m, " %lu ", module_refcount(mod));
/* Always include a trailing , so userspace can differentiate
between this and the old multi-field proc format. */
@@ -903,7 +903,7 @@
static ssize_t show_refcnt(struct module_attribute *mattr,
struct module_kobject *mk, char *buffer)
{
- return sprintf(buffer, "%u\n", module_refcount(mk->mod));
+ return sprintf(buffer, "%lu\n", module_refcount(mk->mod));
}
static struct module_attribute refcnt = {