On Oct 25, 2014 2:15 AM, "Ingo Molnar" <mi...@kernel.org> wrote: > > > * Andy Lutomirski <l...@amacapital.net> wrote: > > > Is there any good reason not to use vmalloc for x86_64 stacks? > > In addition to what hpa mentioned, __pa()/__va() on-kstack DMA > gets tricky, for legacy drivers. (Not sure how many of these are > left though.)
Hopefully very few. DMA debugging warns if the driver uses the DMA API, and if the driver doesn't, then IOMMUs will break it. virtio-net is an oddball offender. I have a patch. --Andy > > Thanks, > > Ingo -- 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/
