Re: [PATCH] sched/numa: fix unsafe get_task_struct() in task_numa_assign()

[Oleg Nesterov]

On 10/19, Oleg Nesterov wrote:
>
> Forgot to mention... Or we can make task_struct_cachep SLAB_DESTROY_BY_RCU,
> in this case ->curr (or any other "task_struct *" ponter) can not go away
> under rcu_read_lock(). task_numa_compare() still needs the PF_EXITING check,
> but we do not need to recheck ->curr or probe_kernel_read().

Damn, please ignore ;) we still need to recheck ->curr.

Oleg.

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