From: Leon Romanovsky <leon@kernel.org>
To: Jiri Pirko <jiri@resnulli.us>
Cc: Jakub Kicinski <kuba@kernel.org>,
netdev@vger.kernel.org, davem@davemloft.net, pabeni@redhat.com,
edumazet@google.com, michael.chan@broadcom.com,
yisen.zhuang@huawei.com, salil.mehta@huawei.com,
jesse.brandeburg@intel.com, anthony.l.nguyen@intel.com,
tariqt@nvidia.com, saeedm@nvidia.com, idosch@nvidia.com,
petrm@nvidia.com, mailhol.vincent@wanadoo.fr,
jacob.e.keller@intel.com, gal@nvidia.com
Subject: Re: [patch net-next v3 01/11] devlink: remove devlink features
Date: Wed, 11 Jan 2023 14:04:41 +0200 [thread overview]
Message-ID: <Y76l2egGm//4Qe5i@unreal> (raw)
In-Reply-To: <Y75x+1+z4VzBx/ip@nanopsycho>
On Wed, Jan 11, 2023 at 09:23:23AM +0100, Jiri Pirko wrote:
> Wed, Jan 11, 2023 at 08:36:36AM CET, leon@kernel.org wrote:
> >On Tue, Jan 10, 2023 at 12:59:15PM -0800, Jakub Kicinski wrote:
> >> On Tue, 10 Jan 2023 08:12:10 +0100 Jiri Pirko wrote:
> >> >> Right, but this is not 100% equivalent because we generate the
> >> >> notifications _before_ we try to reload_down:
> >> >>
> >> >> devlink_ns_change_notify(devlink, dest_net, curr_net, false);
> >> >> err = devlink->ops->reload_down(devlink, !!dest_net, action, limit, extack);
> >> >> if (err)
> >> >> return err;
> >> >>
> >> >> IDK why, I haven't investigated.
> >> >
> >> > Right, but that is done even in other cases where down can't be done. I
> >> > I think there's a bug here, down DEL notification is sent before calling
> >> > down which can potentially fail. I think the notification call should be
> >> > moved after reload_down() call. Then the bahaviour would stay the same
> >> > for the features case and will get fixed for the reload_down() reject
> >> > cases. What do you think?
> >>
> >> I was gonna say that it sounds reasonable, and that maybe we should
> >> be in fact using devlink_notify_register() instead of the custom
> >> instance-and-params-only devlink_ns_change_notify().
> >>
> >> But then I looked at who added this counter-intuitive code
> >> and found out it's for a reason - see 05a7f4a8dff19.
> >>
> >> So you gotta check if mlx5 still has this problem...
> >
> >I don't see anything in the tree what will prevent the issue
> >which I wrote in 05a7f4a8dff19.
>
> Okay. I will remove this patch from the set and address this in a
> separate patchset. Thanks!
BTW, I tried your v3 series and it caused to tests which changes
switchdev mode to stuck.
I'll try v4 now.
Thanks
>
> >
> >Thanks
next prev parent reply other threads:[~2023-01-11 12:06 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-09 18:31 [patch net-next v3 00/11] devlink: features, linecard and reporters locking cleanup Jiri Pirko
2023-01-09 18:31 ` [patch net-next v3 01/11] devlink: remove devlink features Jiri Pirko
2023-01-10 0:55 ` Jakub Kicinski
2023-01-10 7:12 ` Jiri Pirko
2023-01-10 20:59 ` Jakub Kicinski
2023-01-11 7:36 ` Leon Romanovsky
2023-01-11 8:23 ` Jiri Pirko
2023-01-11 12:04 ` Leon Romanovsky [this message]
2023-01-09 18:31 ` [patch net-next v3 02/11] devlink: remove linecards lock Jiri Pirko
2023-01-09 18:31 ` [patch net-next v3 03/11] devlink: remove linecard reference counting Jiri Pirko
2023-01-10 8:10 ` Ido Schimmel
2023-01-09 18:31 ` [patch net-next v3 04/11] devlink: protect health reporter operation with instance lock Jiri Pirko
2023-01-10 8:37 ` Ido Schimmel
2023-01-09 18:31 ` [patch net-next v3 05/11] devlink: remove reporters_lock Jiri Pirko
2023-01-09 18:31 ` [patch net-next v3 06/11] devlink: remove devl_port_health_reporter_destroy() Jiri Pirko
2023-01-09 18:31 ` [patch net-next v3 07/11] devlink: remove reporter reference counting Jiri Pirko
2023-01-09 18:31 ` [patch net-next v3 08/11] devlink: convert linecards dump to devlink_nl_instance_iter_dump() Jiri Pirko
2023-01-09 18:31 ` [patch net-next v3 09/11] devlink: convert reporters " Jiri Pirko
2023-01-09 18:31 ` [patch net-next v3 10/11] devlink: remove devlink_dump_for_each_instance_get() helper Jiri Pirko
2023-01-09 18:31 ` [patch net-next v3 11/11] devlink: add instance lock assertion in devl_is_registered() Jiri Pirko
2023-01-10 1:13 ` [patch net-next v3 00/11] devlink: features, linecard and reporters locking cleanup Jakub Kicinski
2023-01-10 8:40 ` Ido Schimmel
2023-01-11 7:14 ` Ido Schimmel
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