| Message ID | 20191030224930.3990755-11-jhubbard@nvidia.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | mm/gup: track dma-pinned pages: FOLL_PIN, FOLL_LONGTERM | expand |
On Wed, Oct 30, 2019 at 03:49:21PM -0700, John Hubbard wrote: > Convert fs/io_uring to use the new pin_user_pages() call, which sets > FOLL_PIN. Setting FOLL_PIN is now required for code that requires > tracking of pinned pages, and therefore for any code that calls > put_user_page(). > Reviewed-by: Ira Weiny <ira.weiny@intel.com> > Signed-off-by: John Hubbard <jhubbard@nvidia.com> > --- > fs/io_uring.c | 5 ++--- > 1 file changed, 2 insertions(+), 3 deletions(-) > > diff --git a/fs/io_uring.c b/fs/io_uring.c > index a30c4f622cb3..d3924b1760eb 100644 > --- a/fs/io_uring.c > +++ b/fs/io_uring.c > @@ -3431,9 +3431,8 @@ static int io_sqe_buffer_register(struct io_ring_ctx *ctx, void __user *arg, > > ret = 0; > down_read(¤t->mm->mmap_sem); > - pret = get_user_pages(ubuf, nr_pages, > - FOLL_WRITE | FOLL_LONGTERM, > - pages, vmas); > + pret = pin_longterm_pages(ubuf, nr_pages, FOLL_WRITE, pages, > + vmas); > if (pret == nr_pages) { > /* don't support file backed memory */ > for (j = 0; j < nr_pages; j++) { > -- > 2.23.0 > >
On 10/30/19 4:49 PM, John Hubbard wrote: > Convert fs/io_uring to use the new pin_user_pages() call, which sets > FOLL_PIN. Setting FOLL_PIN is now required for code that requires > tracking of pinned pages, and therefore for any code that calls > put_user_page(). Reviewed-by: Jens Axboe <axboe@kernel.dk>
diff --git a/fs/io_uring.c b/fs/io_uring.c index a30c4f622cb3..d3924b1760eb 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -3431,9 +3431,8 @@ static int io_sqe_buffer_register(struct io_ring_ctx *ctx, void __user *arg, ret = 0; down_read(¤t->mm->mmap_sem); - pret = get_user_pages(ubuf, nr_pages, - FOLL_WRITE | FOLL_LONGTERM, - pages, vmas); + pret = pin_longterm_pages(ubuf, nr_pages, FOLL_WRITE, pages, + vmas); if (pret == nr_pages) { /* don't support file backed memory */ for (j = 0; j < nr_pages; j++) {
Convert fs/io_uring to use the new pin_user_pages() call, which sets FOLL_PIN. Setting FOLL_PIN is now required for code that requires tracking of pinned pages, and therefore for any code that calls put_user_page(). Signed-off-by: John Hubbard <jhubbard@nvidia.com> --- fs/io_uring.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)