On 12/09/2015 12:55 PM, Vladimir Davydov wrote:
>> +/*
>> + * Restart iteration over the radix tree, because the
>> + * current node could have been freed when we dropped
>> + * the lock.
>> + */
>
On Wed, Dec 09, 2015 at 12:44:34PM +0300, Andrey Ryabinin wrote:
> tcache_invalidate_node_pages() temporarly drops/takes back node->tree_lock.
> Once lock was dropped, we can't continue iterating to the next slot, because
> another thread might remove and free it. If lock was dropped tree iteration
tcache_invalidate_node_pages() temporarly drops/takes back node->tree_lock.
Once lock was dropped, we can't continue iterating to the next slot, because
another thread might remove and free it. If lock was dropped tree iteration
has to be restarted.
Wit this patch we also drop the lock iff we need
