On Thu, Oct 23, 2014 at 07:14:20AM -0700, Dan Williams wrote: > On Thu, Oct 23, 2014 at 6:52 AM, Roman Gushchin <[email protected]> wrote: > >> That find by Roman discovered that even though NET_DMA was marked > >> broken we were still attempting to pin pages for dma offload. > > > > Not really. Actually I had NET_DMA in my config by mistake. > > Well, that is material to whether this patch should be applied. I had > another report from someone stating that changing the get_user_pages() > call to get_user_pages_fast() improved a network performance benchmark > by a large margin. We shouldn't be pinning pages at all, so with > those two reports I proceeded with deleting rather than mess around > with more surgical disabling. Let me take a closer look and put > together a smaller patch for -stable.
Ok, especially as your patch didn't even apply to 3.17-stable :) -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
