Re: [PATCH 0/3] misc changes for rtrs

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On Tue, Sep 6, 2022 at 1:13 PM Leon Romanovsky <leon@xxxxxxxxxx> wrote:
>
> On Tue, Sep 06, 2022 at 03:04:50PM +0800, Guoqing Jiang wrote:
> > Hi Leon,
> >
> > On 9/5/22 8:28 PM, Leon Romanovsky wrote:
> > > On Fri, Sep 02, 2022 at 06:19:19PM +0800, Guoqing Jiang wrote:
> > > > Hi,
> > > >
> > > > Pls review the three patches.
> > > >
> > > > Thanks,
> > > > Guoqing
> > > >
> > > > Guoqing Jiang (3):
> > > >    RDMA/rtrs: Update comments for MAX_SESS_QUEUE_DEPTH
> > > >    RDMA/rtrs-clt: Break the loop once one path is connected
> > > >    RDMA/rtrs-clt: Kill xchg_paths
> > > >
> > > >   drivers/infiniband/ulp/rtrs/rtrs-clt.c | 18 +++++-------------
> > > >   drivers/infiniband/ulp/rtrs/rtrs-pri.h |  7 +++----
> > > >   2 files changed, 8 insertions(+), 17 deletions(-)
> > > The third patch still generates warnings.
> >
> > Sorry, I didn't run sparse check, 😅.
> >
> > > ➜  kernel git:(wip/leon-for-next) mkt ci
> > > ^[[A^[[A^[[Ad9b137e23d31 (HEAD -> build) RDMA/rtrs-clt: Kill xchg_paths
> > > WARNING: line length of 81 exceeds 80 columns
> > > #43: FILE: drivers/infiniband/ulp/rtrs/rtrs-clt.c:2297:
> > > +           if (try_cmpxchg((typeof(ppcpu_path))ppcpu_path, &clt_path, next))
> > >
> > > drivers/infiniband/ulp/rtrs/rtrs-clt.c:2297:21: warning: incorrect type in initializer (different address spaces)
> > > drivers/infiniband/ulp/rtrs/rtrs-clt.c:2297:21:    expected struct rtrs_clt_path [noderef] __rcu *__new
> > > drivers/infiniband/ulp/rtrs/rtrs-clt.c:2297:21:    got struct rtrs_clt_path *[assigned] next
> >
> > Before send new version, could you help to check whether the incremental
> > change works or not? Otherwise let's drop the third one.
>
> Thanks, it worked.

Looks good.

Acked-by: Md Haris Iqbal <haris.iqbal@xxxxxxxxx>

For all 3 patches (3rd one with the latest changes).
Thanks.

>
> >
> > diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt.c
> > b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
> > index 0661a4e69fc9..bc3e1722e00d 100644
> > --- a/drivers/infiniband/ulp/rtrs/rtrs-clt.c
> > +++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
> > @@ -2294,7 +2294,8 @@ static void rtrs_clt_remove_path_from_arr(struct
> > rtrs_clt_path *clt_path)
> >                  * We race with IO code path, which also changes pointer,
> >                  * thus we have to be careful not to overwrite it.
> >                  */
> > -               if (try_cmpxchg((typeof(ppcpu_path))ppcpu_path, clt_path,
> > next))
> > +               if (try_cmpxchg((struct rtrs_clt_path **)ppcpu_path,
> > +                               clt_path, next))
> >                         /*
> >                          * @ppcpu_path was successfully replaced with @next,
> >                          * that means that someone could also pick up the
> >
> > Thanks,
> > Guoqing




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