Commit 0cebb407 authored Sep 01, 2015 by Riley Andrews Committed by Todd Kjos Jul 13, 2017

FROMLIST: binder: Use wake up hint for synchronous transactions.

(from https://patchwork.kernel.org/patch/9817747

)

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.

Change-Id: Ic406a232d0873662f80148e37acefe5243d912a0
Signed-off-by: Todd Kjos <tkjos@google.com>
Git-commit: 443c026e90820170aa3db2c21d2933ae5922f900
Git-repo: https://android.googlesource.com/kernel/msm


Signed-off-by: Omprakash Dhyade <odhyade@codeaurora.org>

parent ec49bb00

drivers/android/binder.c

+6 −2

Original line number	Diff line number	Diff line
		@@ -2201,8 +2201,12 @@ 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)
		if (target_wait) {
		if (reply \|\| !(t->flags & TF_ONE_WAY))
		wake_up_interruptible_sync(target_wait);
		else
		wake_up_interruptible(target_wait);
		}
		return;

		err_translate_failed: