On Tuesday 09 October 2007 03:04, Andrew Morton wrote: > On Mon, 8 Oct 2007 19:45:08 +0800 "Yan Zheng" <yanzheng@xxxxxxxx> wrote: > > Hi all > > > > The test for VM_CAN_NONLINEAR always fails > > > > Signed-off-by: Yan Zheng<yanzheng@xxxxxxxx> > > ---- > > diff -ur linux-2.6.23-rc9/mm/fremap.c linux/mm/fremap.c > > --- linux-2.6.23-rc9/mm/fremap.c 2007-10-07 15:03:33.000000000 +0800 > > +++ linux/mm/fremap.c 2007-10-08 19:33:44.000000000 +0800 > > @@ -160,7 +160,7 @@ > > if (vma->vm_private_data && !(vma->vm_flags & VM_NONLINEAR)) > > goto out; > > > > - if (!vma->vm_flags & VM_CAN_NONLINEAR) > > + if (!(vma->vm_flags & VM_CAN_NONLINEAR)) > > goto out; > > > > if (end <= start || start < vma->vm_start || end > vma->vm_end) > > Lovely. From this we can deduce that nobody has run remap_file_pages() > since 2.6.23-rc1 and that nobody (including the developer who made that > change) ran it while that change was in -mm. But you'd be wrong. remap_file_pages was tested both with my own tester and Ingo's test program. vm_flags != 0, !vm_flags = 0, 0 & x = 0, so the test always falls through. Of course, what I _should_ have done is also test a driver which does not have VM_CAN_NONLINEAR... but even I wouldn't rewrite half the nonlinear mapping code without once testing it ;) FWIW, Oracle (maybe the sole real user of this) has been testing it, which I'm very happy about (rather than testing after 2.6.23 is released). - 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
