Hello, On Tue, Sep 15, 2015 at 11:11:45PM +0200, Christian Borntraeger wrote: > > In fact, I would say that any userspace-controlled call to *_expedited() > > is a bug waiting to happen and a bad idea---because userspace can, with > > little effort, end up calling it in a loop. > > Right. This also implies that we should fix this for 4.2 - I guess.
Are the percpu_rwsem changes enough? If so, we can try to backport those. If those are too risky, we can revert the patches which switched threadgroup lock to percpu_rwsem. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
