linux-kernel - Re: [PATCH v2 net-next 1/2] octeontx2-af: Knobs for NPC default rule counters

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Message-ID: <20240917081244.GK167971@kernel.org>
Date: Tue, 17 Sep 2024 09:12:44 +0100
From: Simon Horman <horms@...nel.org>
To: Linu Cherian <lcherian@...vell.com>
Cc: davem@...emloft.net, sgoutham@...vell.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, gakula@...vell.com,
	hkelam@...vell.com, sbhatta@...vell.com, edumazet@...gle.com,
	kuba@...nel.org, pabeni@...hat.com
Subject: Re: [PATCH v2 net-next 1/2] octeontx2-af: Knobs for NPC default rule
 counters

On Tue, Sep 17, 2024 at 10:08:26AM +0530, Linu Cherian wrote:
> Hi Simon,
> 
> On 2024-09-14 at 13:43:17, Simon Horman (horms@...nel.org) wrote:
> > On Thu, Sep 12, 2024 at 09:44:49PM +0530, Linu Cherian wrote:
> > > Add devlink knobs to enable/disable counters on NPC
> > > default rule entries.
> > > 
> > > Introduce lowlevel variant of rvu_mcam_remove/add_counter_from/to_rule
> > > for better code reuse, which assumes necessary locks are taken at
> > > higher level.
> > > 
> > > Sample command to enable default rule counters:
> > > devlink dev param set <dev> name npc_def_rule_cntr value true cmode runtime
> > > 
> > > Sample command to read the counter:
> > > cat /sys/kernel/debug/cn10k/npc/mcam_rules
> > > 
> > > Signed-off-by: Linu Cherian <lcherian@...vell.com>
> > > ---
> > > Changelog from v1:
> > > Removed wrong mutex_unlock invocations.
> > 
> > Hi Linu,
> > 
> > This patch seems to be doing two things:
> > 
> > 1) Refactoring some functions to have locking and non-locking variants.
> >    By LoC this is appears the bulk of the code changed in this patch.
> >    It also appears to be straightforward.
> > 
> > 2) Adding devlink knobs
> > 
> >    As this is a user-facing change it probably requires a deeper review
> >    than 1)
> > 
> > I would suggest, that for review, it would be very nice to split
> > 1) and 2) into separate patches. Maybe including a note in the patch
> > for 1) that the refactor will be used in the following patch for 2).
> >
> 
> Ack. Will split into two while reposting.

Thanks.

Please note that net-next is currently closed for the v6.12 merge window.
So please wait for it to re-open before reposting. That will occur
after v6.12-rc1 is released, most likely about two weeks from now.

> 
> > As for the code changes themselves, I did look over them,
> > and I didn't see any problems.
> 
> 
> Linu Cherian.
>