On Thu, Jul 30, 2020 at 05:22:19PM +0100, Al Viro wrote:
> FWIW, none of the dubious (and outright broken) cases I've found go anywhere
> near that. And it definitely won't help tun/tap...
Then I'm missing something obvious - what is the problem with tun/tap?
On Thu, Jul 30, 2020 at 05:17:01PM +0100, Al Viro wrote:
> On Thu, Jul 30, 2020 at 05:20:46PM +0200, Christoph Hellwig wrote:
>
> > Fortunately I think the fix is pretty easy - remove the special pipe
> > zero copy optimization from copy_page_to_iter, and just have the
> > callers actually want
On Thu, Jul 30, 2020 at 05:20:46PM +0200, Christoph Hellwig wrote:
> Fortunately I think the fix is pretty easy - remove the special pipe
> zero copy optimization from copy_page_to_iter, and just have the
> callers actually want it because they have pagecache or similar
> refcountable pages use
On Thu, Jul 30, 2020 at 04:08:26PM +0100, Al Viro wrote:
> > I think we need to fix that in the instances, as we really expect
> > ->splice_read to just work instead of the caller knowing what could
> > work and what might not.
>
> Er... generic_file_splice_read() is a library helper; the
On Thu, Jul 30, 2020 at 09:03:29AM +0200, Christoph Hellwig wrote:
> On Thu, Jul 30, 2020 at 01:05:44AM +0100, Al Viro wrote:
> > On Tue, Jul 07, 2020 at 07:48:00PM +0200, Christoph Hellwig wrote:
> > > If a file implements the ->read_iter method, the iter based splice read
> > > works and is
On Thu, Jul 30, 2020 at 01:05:44AM +0100, Al Viro wrote:
> On Tue, Jul 07, 2020 at 07:48:00PM +0200, Christoph Hellwig wrote:
> > If a file implements the ->read_iter method, the iter based splice read
> > works and is always preferred over the ->read based one. Use it by
> > default in
On Tue, Jul 07, 2020 at 07:48:00PM +0200, Christoph Hellwig wrote:
> If a file implements the ->read_iter method, the iter based splice read
> works and is always preferred over the ->read based one. Use it by
> default in do_splice_to and remove all the direct assignment of
>
If a file implements the ->read_iter method, the iter based splice read
works and is always preferred over the ->read based one. Use it by
default in do_splice_to and remove all the direct assignment of
generic_file_splice_read to file_operations.
Signed-off-by: Christoph Hellwig
---
If a file implements the ->read_iter method, the iter based splice read
works and is always preferred over the ->read based one. Use it by
default in do_splice_to and remove all the direct assignment of
generic_file_splice_read to file_operations.
Signed-off-by: Christoph Hellwig
---
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