Andrew Morton <[email protected]> wrote:
> On Tue, 11 Jul 2006 00:36:39 -0400
> Shailabh Nagar <[email protected]> wrote:
>
>> down_write(&listeners->sem);
>> list_for_each_entry_safe(s, tmp, &listeners->list, list) {
>> - ret = genlmsg_unicast(skb, s->pid);
>> + skb_next = NULL;
>> + if (!list_islast(&s->list, &listeners->list)) {
>> + skb_next = skb_clone(skb_cur, GFP_KERNEL);
>
> If we do a GFP_KERNEL allocation with this semaphore held, and the
> oom-killer tries to kill something to satisfy the allocation, and the
> killed task gets stuck on that semaphore, I wonder of the box locks up.
We do GFP_KERNEL inside semaphores/mutexes in lots of places. So if this
can deadlock with the oom-killer we probably should fix that, preferably
by having GFP_KERNEL fail in that case.
Cheers,
--
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