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
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, whi
On Wed, Jan 15, 2020 at 07:56:14AM +0100, Christoph Hellwig wrote:
> On Tue, Jan 14, 2020 at 03:27:00PM -0400, Jason Gunthorpe wrote:
> > I've seen similar locking patterns quite a lot, enough I've thought
> > about having a dedicated locking primitive to do it. It really wants
&g
On Wed, Jan 15, 2020 at 04:36:14PM +0100, Christoph Hellwig wrote:
> synchronous and currently hack that up, so a version of the percpu_ref
> that actually waits for the other references to away like we hacked
> up various places seems to exactly suit your requirements.
Ah, yes, sounds like a
-
> net/rds/tcp.h | 1 -
> net/rds/tcp_listen.c | 2 +-
> 16 files changed, 49 insertions(+), 127 deletions(-)
No problem with the siw change
Acked-by: Jason Gunthorpe
Jason
On Fri, Nov 20, 2020 at 12:21:39PM -0600, Gustavo A. R. Silva wrote:
> IB/hfi1: Fix fall-through warnings for Clang
> IB/mlx4: Fix fall-through warnings for Clang
> IB/qedr: Fix fall-through warnings for Clang
> RDMA/mlx5: Fix fall-through warnings for Clang
I picked these four to the
