From: Joe Perches <joe@perches.com>
To: jim.cromie@gmail.com, Stanimir Varbanov <stanimir.varbanov@linaro.org>
Cc: Randy Dunlap <rdunlap@infradead.org>,
Matthew Wilcox <willy@infradead.org>,
Linux Documentation List <linux-doc@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org,
linux-btrfs@vger.kernel.org, linux-acpi@vger.kernel.org,
netdev@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jason Baron <jbaron@akamai.com>
Subject: Re: [PATCH v3 0/7] Venus dynamic debug
Date: Tue, 09 Jun 2020 15:23:07 -0700 [thread overview]
Message-ID: <6115b15ced02686f7408417411ff758445b42421.camel@perches.com> (raw)
In-Reply-To: <CAJfuBxwyDysP30cMWDusw4CsSQitchA5hOKkpk1PktbsbCKTSw@mail.gmail.com>
On Tue, 2020-06-09 at 15:21 -0600, jim.cromie@gmail.com wrote:
> On Tue, Jun 9, 2020 at 10:49 AM Joe Perches <joe@perches.com> wrote:
> > (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/
> >
> >
>
> As Joe noted, there is a lot of ad-hockery to possibly clean up,
> but I dont grok how these levels should be distinguished from
> KERN_(WARN|INFO|DEBUG) constants.
These are not KERN_<LEVEL> at all, all are emitted at KERN_DEBUG
These are just driver developer mechanisms to enable/disable
groups of formats via some test for < level or | bitmap
> Those constants are used by coders, partly to convey how bad things are
> As a user, Id be reluctant to disable an EMERG callsite.
Not possible.
> are you trying to add a User Bit ? or maybe 7-9 of them ?
Or maybe a u32/ulong worth as most as I think the largest
current use is 32 bits of bitmask.
> I have a patchset which adds a 'u' flag, for user.
Adapting that with an external bool for bitmask or class
would work fine.
if (is_bitmask)
enable/disable(value|flag)
else
enable/disable(value < flag)
So the equivalent of logical sets would work just fine.
next prev parent reply other threads:[~2020-06-09 22:23 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-09 10:45 [PATCH v3 0/7] Venus dynamic debug Stanimir Varbanov
2020-06-09 10:45 ` [PATCH v3 1/7] Documentation: dynamic-debug: Add description of level bitmask Stanimir Varbanov
2020-06-09 11:09 ` Matthew Wilcox
2020-06-09 11:16 ` Greg Kroah-Hartman
2020-06-09 16:58 ` Joe Perches
2020-06-09 17:42 ` Edward Cree
2020-06-09 17:56 ` Joe Perches
2020-06-09 18:08 ` Edward Cree
2020-06-10 6:31 ` Greg Kroah-Hartman
2020-06-10 6:35 ` Joe Perches
2020-06-10 7:09 ` Greg Kroah-Hartman
2020-06-10 7:24 ` Joe Perches
2020-06-10 10:29 ` Stanimir Varbanov
2020-06-10 12:26 ` Greg Kroah-Hartman
2020-06-09 10:45 ` [PATCH v3 2/7] dynamic_debug: Group debug messages by " Stanimir Varbanov
2020-06-09 12:27 ` Petr Mladek
2020-06-09 10:46 ` [PATCH v3 3/7] dev_printk: Add dev_dbg_level macro over dynamic one Stanimir Varbanov
2020-06-09 10:46 ` [PATCH v3 4/7] printk: Add pr_debug_level " Stanimir Varbanov
2020-06-09 11:12 ` Greg Kroah-Hartman
2020-06-09 10:46 ` [PATCH v3 5/7] venus: Add debugfs interface to set firmware log level Stanimir Varbanov
2020-06-09 11:12 ` Greg Kroah-Hartman
2020-06-11 11:51 ` Stanimir Varbanov
2020-06-09 10:46 ` [PATCH v3 6/7] venus: Make debug infrastructure more flexible Stanimir Varbanov
2020-06-09 11:14 ` Greg Kroah-Hartman
2020-06-10 13:29 ` Stanimir Varbanov
2020-06-10 13:37 ` Greg Kroah-Hartman
2020-06-10 19:49 ` Joe Perches
2020-06-10 20:23 ` Joe Perches
2020-06-11 6:26 ` Greg Kroah-Hartman
2020-06-11 6:42 ` Joe Perches
2020-06-11 10:52 ` Daniel Thompson
2020-06-11 11:31 ` Stanimir Varbanov
2020-06-11 12:18 ` Daniel Thompson
2020-06-11 21:19 ` jim.cromie
2020-06-11 21:59 ` Jason Baron
2020-06-11 22:33 ` Joe Perches
2020-06-12 0:08 ` jim.cromie
2020-06-10 18:32 ` WIP generic module->debug_flags and dynamic_debug jim.cromie
2020-06-10 20:24 ` Joe Perches
2020-06-11 11:26 ` Rasmus Villemoes
2020-06-11 14:09 ` jim.cromie
2020-06-09 10:46 ` [PATCH v3 7/7] venus: Add a debugfs file for SSR trigger Stanimir Varbanov
2020-06-09 11:13 ` [PATCH v3 0/7] Venus dynamic debug Matthew Wilcox
2020-06-09 16:03 ` Randy Dunlap
2020-06-09 16:49 ` Joe Perches
2020-06-09 21:21 ` jim.cromie
2020-06-09 22:23 ` Joe Perches [this message]
2020-06-10 1:58 ` Joe Perches
2020-06-10 3:10 ` jim.cromie
2020-06-09 16:40 ` Joe Perches
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