On Fri, Oct 28, 2016 at 03:12:32PM -0400, Tejun Heo wrote: > 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 This one I actually fixed and should be in -next. And it would be sufficient to cover the use case here. > 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. rwsems could be done for writers only. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
