Re: [Qemu-devel] [RFC PATCH 14/16] qcow2: Execute run_dependent_requests() without lock

[Kevin Wolf]

Am 18.09.2012 16:33, schrieb Paolo Bonzini:
> Il 18/09/2012 13:40, Kevin Wolf ha scritto:
>>  static void run_dependent_requests(BDRVQcowState *s, QCowL2Meta *m)
>>  {
>> -    /* Take the request off the list of running requests */
>> -    if (m->nb_clusters != 0) {
>> -        QLIST_REMOVE(m, next_in_flight);
>> -    }
>> -
>>      /* Restart all dependent requests */
>>      if (!qemu_co_queue_empty(&m->dependent_requests)) {
>> -        qemu_co_mutex_unlock(&s->lock);
>>          qemu_co_queue_restart_all(&m->dependent_requests);
>> -        qemu_co_mutex_lock(&s->lock);
>>      }
> 
> The comment and if can go away.

Ah, yes. And the one remaining line can be open coded in the two callers.

> Perhaps this patch could be moved earlier in the series?  (Just asking,
> in case the rebase is not too painful).

I'll check how painful it becomes. I'd expect it's doable.

Kevin