On Wed, Jan 15, 2020 at 03:33:47PM +0100, Peter Zijlstra wrote:
> On Wed, Jan 15, 2020 at 09:24:28AM -0400, Jason Gunthorpe wrote:
>
> > I was interested because you are talking about allowing the read/write side
> > of a rw sem to be held across a return to user space/etc, which is the
> > same
On Tue, Jan 14, 2020 at 05:12:13PM +0100, Christoph Hellwig wrote:
> Hi all,
>
> Asynchronous read/write operations currently use a rather magic locking
> scheme, were access to file data is normally protected using a rw_semaphore,
> but if we are doing aio where the syscall returns to userspace
