On Fri, 27 Apr 2007, Andrew Morton wrote: > > hm, could do. might_sleep() is intertwined with preempt in complex ways, > but we did decouple that at the config level. no_mmap_sem() will dtrt for > all preempt settings. > > But I'll be keeping this as a -mm-only debug patch (which brings us up to > about thirty of 'em), so I think it's best to make it unconfigurable so we > get maximum coverage. > > That's if it actually works. I haven't tried running it yet, and I have a > feeling that running it might cause a big "doh" moment. We'll see.
Yes, I'm expecting the crucial > + WARN_ON(rwsem_is_locked(&mm->mmap_sem)) to give a bogus warning every time another thread (or /proc, or swapoff, or whatever) happens to have this mmap_sem locked. might_sleep() is quite different, works on our thread's info. Hugh - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
