Messages in this thread | | | Date | Sat, 27 Aug 2022 23:46:28 +0100 | From | Al Viro <> | Subject | Re: [PATCH 3/6] iov_iter: new iov_iter_pin_pages*() routines |
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On Sat, Aug 27, 2022 at 01:36:04AM -0700, John Hubbard wrote: > Provide two new wrapper routines that are intended for user space pages > only: > > iov_iter_pin_pages() > iov_iter_pin_pages_alloc() > > Internally, these routines call pin_user_pages_fast(), instead of > get_user_pages_fast(). > > As always, callers must use unpin_user_pages() or a suitable FOLL_PIN > variant, to release the pages, if they actually were acquired via > pin_user_pages_fast(). > > This is a prerequisite to converting bio/block layers over to use > pin_user_pages_fast().
You do realize that O_DIRECT on ITER_BVEC is possible, right?
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