diff options
| author | Riley Andrews <riandrews@google.com> | 2017-06-29 12:01:37 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-08-30 10:21:53 +0200 |
| commit | 8fb0b0ce288d38d78685a9d6f6320339afadf709 (patch) | |
| tree | c1ec48d87746c744d93411649f05149755d1454a | |
| parent | 51050750181c791410a7e8dc405cc909e264587b (diff) | |
binder: Use wake up hint for synchronous transactions.
commit 00b40d613352c623aaae88a44e5ded7c912909d7 upstream.
Use wake_up_interruptible_sync() to hint to the scheduler binder
transactions are synchronous wakeups. Disable preemption while waking
to avoid ping-ponging on the binder lock.
Signed-off-by: Todd Kjos <tkjos@google.com>
Signed-off-by: Omprakash Dhyade <odhyade@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/android/binder.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/android/binder.c b/drivers/android/binder.c index abd10afa014f..5ce7ee98f3b5 100644 --- a/drivers/android/binder.c +++ b/drivers/android/binder.c @@ -1724,8 +1724,12 @@ static void binder_transaction(struct binder_proc *proc, list_add_tail(&t->work.entry, target_list); tcomplete->type = BINDER_WORK_TRANSACTION_COMPLETE; list_add_tail(&tcomplete->entry, &thread->todo); - if (target_wait) - wake_up_interruptible(target_wait); + if (target_wait) { + if (reply || !(t->flags & TF_ONE_WAY)) + wake_up_interruptible_sync(target_wait); + else + wake_up_interruptible(target_wait); + } return; err_get_unused_fd_failed: |