On Thu, May 10, 2007 at 09:12:41AM -0400, Mathieu Desnoyers wrote:
> Linux Kernel Markers - Architecture Independant Code fix 2
>
> Fix trivial SMP bug in list_modules.
> --- linux-2.6-lttng.orig/kernel/module.c 2007-05-10 08:51:02.000000000 -0400
> +++ linux-2.6-lttng/kernel/module.c 2007-05-10 08:51:06.000000000 -0400
> @@ -2657,13 +2657,16 @@
> /* Enumerate loaded modules */
> struct list_head *i;
> struct module *mod;
> - unsigned long refcount = 0;
> + unsigned long refcount;
> + int cpu;
>
> mutex_lock(&module_mutex);
> list_for_each(i, &modules) {
> mod = list_entry(i, struct module, list);
> + refcount = 0;
> #ifdef CONFIG_MODULE_UNLOAD
> - refcount = local_read(&mod->ref[0].count);
> + for_each_online_cpu(cpu)
> + refcount += local_read(&mod->ref[cpu].count);
> #endif //CONFIG_MODULE_UNLOAD
Still wrong: module_get on cpu X, cpu X hot unplugged. There is
module_refcount() for you.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
