[lkml]   [2023]   [Jan]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH v7 2/8] iov_iter: Add a function to extract a page list from an iterator
On Fri, Jan 20, 2023 at 05:55:50PM +0000, David Howells wrote:
> (3) Any other sort of iterator.
> No refs or pins are obtained on the page, the assumption is made that
> the caller will manage page retention. ITER_ALLOW_P2PDMA is not
> permitted.

The ITER_ALLOW_P2PDMA check here is fundamentally wrong and will
break things like io_uring to fixed buffers on NVMe. ITER_ALLOW_P2PDMA
should strictly increase the group of acceptable iters, it does must
not restrict anything.

 \ /
  Last update: 2023-03-26 23:51    [W:0.420 / U:0.272 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site