netdev - Re: [PATCH] sctp: Add process name and pid to deprecation warnings

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Date:	Thu, 2 Jan 2014 21:30:19 -0500
From:	Neil Horman <nhorman@...driver.com>
To:	Ben Hutchings <bhutchings@...arflare.com>
Cc:	linux-sctp@...r.kernel.org, Vlad Yasevich <vyasevich@...il.com>,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH] sctp: Add process name and pid to deprecation warnings

On Fri, Jan 03, 2014 at 12:18:37AM +0000, Ben Hutchings wrote:
> On Thu, 2014-01-02 at 15:30 -0500, Neil Horman wrote:
> > On Thu, Jan 02, 2014 at 07:52:30PM +0000, Ben Hutchings wrote:
> > > On Thu, 2014-01-02 at 12:54 -0500, Neil Horman wrote:
> > > > Recently I updated the sctp socket option deprecation warnings to be both a bit
> > > > more clear and ratelimited to prevent user processes from spamming the log file.
> > > > Ben Hutchings suggested that I add the process name and pid to these warnings so
> > > > that users can tell who is responsible for using the deprecated apis.  This
> > > > patch accomplishes that.
> > > [...]
> > > 
> > > I grepped for existing deprecation warnings that log the command and/or
> > > PID.  The warnings are not consistent, but where the include both comand
> > > and PID it's generally in the format "%s (%d)", comm, pid.  So please
> > > could you follow that format?
> > > 
> > Thats not really true, Subsystems vary widely in how they present process
> > name/pid warnings.  In fact, the first example you give below that uses both
> > process and pid, the format is <pid> (<name>)
> > 
> > There are alot that use <name> (<pid>), I argee, but theres quite alot of others
> > as well (the lockdep subssytem uses %s/%d, and several of the arm trap handlers
> > actually use Process <name> (pid: <pid>).
> 
> Ah, I was just looking specifically at deprecation warnings.  I can see
> that broader consistency is also worthwhile.
> 
I'm not disagreeing, just pointing out that there is no real consistency in this
format.

> > I don't have any issue with changing
> > it, but I'm not sure what the advantage is if theres not going to be consistent
> > use throughout the kernel.
> 
> Well I thought you were trying to improve that, starting with that
> DEPRECATED macro.
> 
Which is why I changed it, although I don't think theres going to be any
noticible change here unless theres a larger cross-subsystem effort undertaken
here.  Maybe I'll try to do that next time I have some free time.

Regards
Neil

> Ben.
> 
> -- 
> Ben Hutchings, Staff Engineer, Solarflare
> Not speaking for my employer; that's the marketing department's job.
> They asked us to note that Solarflare product names are trademarked.
> 
> 
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