Re: [PATCH v9 0/9] dax: fix dma vs truncate/hole-punch

On Tue, Apr 24, 2018 at 4:33 PM, Dan Williams <dan.j.williams(a)intel.com&gt; wrote: > Changes since v8 [1]: > * Rebase on v4.17-rc2 > > * Fix get_user_pages_fast() for ZONE_DEVICE pages to revalidate the pte, > pmd, pud after taking references (Jan) > > * Kill dax_layout_lock(). With get_user_pages_fast() for ZONE_DEVICE > fixed we can then rely on the {pte,pmd}_lock to synchronize > dax_layout_busy_page() vs new page references (Jan) > > * Hold the iolock over repeated invocations of dax_layout_busy_page() to > enable truncate/hole-punch to make forward progress in the presence of > a constant stream of new direct-I/O requests (Jan). > > [1]: https://lists.01.org/pipermail/linux-nvdimm/2018-March/015058.html I'll push this for soak time in -next if there are no further comments...