On 11/02/2015 09:47, Fam Zheng wrote:
>> > +rcu_read_lock();
>> > +block = atomic_rcu_read(&ram_list.mru_block);
>> > if (block && block->host && host - block->host < block->max_length) {
>> > goto found;
>> > }
>> >
>> > -QLIST_FOREACH(block, &ram_list.blocks, ne
On Fri, 02/06 17:55, Paolo Bonzini wrote:
> From: Mike Day
>
> Allow "unlocked" reads of the ram_list by using an RCU-enabled QLIST.
>
> The ramlist mutex is kept, because call_rcu callbacks are not run within
> the iothread lock. Thus, writers still need to take the ramlist mutex,
> but they n
