On Fri, Jul 18, 2014 at 05:21:55PM +0200, Miklos Szeredi wrote: > On Mon, Jul 14, 2014 at 9:18 PM, Seth Forshee > <seth.forshee@xxxxxxxxxxxxx> wrote: > > fuse_copy_finish() assumes that mapaddr in fuse_copy_state refers > > to a valid mapping if currbuf is non-NULL, but this isn't always > > true when moving pages for splice I/O. This results in an > > unbalanced call to kunmap_atomic() and thus an unbalanced > > decrement of the preempt count. Avoid this by checking that > > mapaddr is non-NULL before calling kunmap_atomic(). > > I guess this is obsoleted by: > > c55a01d360af fuse: avoid scheduling while atomic > > which moves the kmap/kunmap closer to the actual use of the mapping. > > Can you please verify? Yes, that commit does seem to fix the problem. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/