Hello, Peter. On Fri, Oct 28, 2016 at 09:07:02PM +0200, Peter Zijlstra wrote: > One alternative is to inherit the iowait state of the task we block on. > That'll not get rid of the branches much, but it will remove the new > mutex APIs.
Yeah, thought about that briefly but we don't necessarily track mutex or other synchronization construct owners, things get gnarly with rwsems (the inode ones sometimes end up in a similar situation), and we'll probably end up dealing with some surprising propagations down the line. That said, getting such automatic propagation working would be great. Thanks. -- tejun
