linux-kernel - Re: [PATCH v3 0/7] Venus dynamic debug

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Message-ID: <9a79aded6981ec47f1f8b317b784e6e44158ac61.camel@perches.com>
Date:   Tue, 09 Jun 2020 09:49:30 -0700
From:   Joe Perches <joe@...ches.com>
To:     Randy Dunlap <rdunlap@...radead.org>,
        Matthew Wilcox <willy@...radead.org>,
        Stanimir Varbanov <stanimir.varbanov@...aro.org>,
        Jim Cromie <jim.cromie@...il.com>
Cc:     linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-btrfs@...r.kernel.org, linux-acpi@...r.kernel.org,
        netdev@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jason Baron <jbaron@...mai.com>
Subject: Re: [PATCH v3 0/7] Venus dynamic debug

(adding Jim Cromie and comments)

On Tue, 2020-06-09 at 09:03 -0700, Randy Dunlap wrote:
> On 6/9/20 4:13 AM, Matthew Wilcox wrote:
> > On Tue, Jun 09, 2020 at 01:45:57PM +0300, Stanimir Varbanov wrote:
> > > Here is the third version of dynamic debug improvements in Venus
> > > driver.  As has been suggested on previous version by Joe [1] I've
> > > made the relevant changes in dynamic debug core to handle leveling
> > > as more generic way and not open-code/workaround it in the driver.
> > > 
> > > About changes:
> > >  - added change in the dynamic_debug and in documentation
> > >  - added respective pr_debug_level and dev_dbg_level
> > 
> > Honestly, this seems like you want to use tracepoints, not dynamic debug.

Tracepoints are a bit heavy and do not have any class
or grouping mechanism.

debug_class is likely a better name than debug_level

> Also see this patch series:
> https://lore.kernel.org/lkml/20200605162645.289174-1-jim.cromie@gmail.com/
> [PATCH 00/16] dynamic_debug: cleanups, 2 features
> 
> It adds/expands dynamic debug flags quite a bit.

Yes, and thanks Randy and Jim and Stanimir

I haven't gone through Jim's proposal enough yet.
It's unfortunate these patches series conflict.

And for Jim, a link to Stanimir's patch series:
https://lore.kernel.org/lkml/20200609104604.1594-1-stanimir.varbanov@linaro.org/