On Sat, Jul 14, 2018 at 1:32 AM Yafang Shao <laoar.s...@gmail.com> wrote: > > try_charge maybe executed in packet receive path, which is in interrupt > context. > In this situation, the 'current' is the interrupted task, which may has > no relation to the rx softirq, So it is nonsense to use 'current'. >
Have you actually seen this occurring? I am not very familiar with the network code but I can think of two ways try_charge() can be called from network code. Either through kmem charging or through mem_cgroup_charge_skmem() and both locations correctly handle interrupt context. Shakeel
