evie/android_kernel_oneplus_msm8998
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FROMLIST: binder: Use wake up hint for synchronous transactions.

Browse source 
(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>
This commit is contained in:
Riley Andrews 2015-09-01 12:42:07 -07:00 • committed by Todd Kjos
parent ec49bb00cd
commit 0cebb407b2
1 changed files with 6 additions and 2 deletions
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8
drivers/android/binder.c
View file

@ -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)
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_translate_failed: