[PATCH pm-freezer 3/4] freezer: check freezing() before leaving FROZEN state

Oleg Nesterov oleg at redhat.com
Mon Aug 29 10:21:32 PDT 2011


On 08/29, Oleg Nesterov wrote:
>
> Hmm. But I got lost a bit. Why do we need freezer_lock to set/clear
> PF_FROZEN ? OK, the code below takes freezer_lock for freezing().
> Is there any other reason?

Ah, at least we need it to serialize with __thaw_task() which does
"if (frozen) wake_up()".

Oleg.



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