* KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> [2010-06-09 15:59:40]:
> + if (consume_stock(mem)) {
> + /*
> + * It seems dagerous to access memcg without css_get().
> + * But considering how consume_stok works, it's not
> + * necessary. If consume_stock success, some charges
> + * from this memcg are cached on this cpu. So, we
> + * don't need to call css_get()/css_tryget() before
> + * calling consume_stock().
> + */
> + rcu_read_unlock();
> + goto done;
> + }
> + if (!css_tryget(&mem->css)) {
If tryget fails, can one assume that this due to a race and the mem is
about to be freed?
--
Three Cheers,
Balbir
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