Lines Matching full:intent

9  * Shared/intent/exclusive locks: sleepable read/write locks, like rw semaphores
10  * but with an additional state: read/shared, intent, exclusive/write
12  * The purpose of the intent state is to allow for greater concurrency on tree
17  * But by adding an intent state, which is exclusive with other intent locks but
18  * not with readers, we can take intent locks at the start of the operation,
26  * An intent lock must be held before taking a write lock:
37  *   six_lock_downgrade()	convert from intent to read
38  *   six_lock_tryupgrade()	attempt to convert from read to intent, may fail
69  *   read and intent states that can be used to provide reentrancy by an upper
71  *   read or intent state, six_lock_increment() can be used to bump the "lock
82  *   Since the intent state supercedes read, it's legal to increment the read
83  *   counter when holding an intent lock, but not the reverse.
184  * @lock should be held for read or intent, and not write
366 __SIX_LOCK(intent)