On 11/17/2016 06:28 AM, Olaf Hering wrote: > On Wed, Nov 16, Boris Ostrovsky wrote: > >> Unfortunately I haven't been able to trigger NUMA balancing >> so while I tested this in general I am not sure I actually >> exercised the code path. > Thanks for the patch! > > Would be nice to actually test the code path which caused the initial > addition of VM_IO. I think I lack the hardware to excersise them.
To trip the original bug is even more difficult than to trigger NUMA balancing. It was very sensitive to memory allocation. > > > In my 4.4 based sources I get the following unresolved symbols. If that > happens to work in mainline the failures should at least be considered > during backporting of this proposed patch to the stable trees. > > ERROR: "__mpol_dup" [drivers/xen/xen-gntdev.ko] undefined! > ERROR: "get_task_policy" [drivers/xen/xen-gntdev.ko] undefined! > > Appearently these symbols lack just an EXPORT_SYMBOL_GPL. I just built 4.4.11 with this patch applied and haven't had any problems. -boris
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