linux-kernel - Re: [PATCH 4/8] input: Remove OOM message after input_allocate

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Message-ID: <20131024191032.GA5553@core.coreip.homeip.net>
Date:	Thu, 24 Oct 2013 12:10:33 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Joe Perches <joe@...ches.com>
Cc:	linux-kernel@...r.kernel.org, Wan ZongShun <mcuos.com@...il.com>,
	Andrey Moiseev <o2g.org.ru@...il.com>,
	Henrik Rydberg <rydberg@...omail.se>,
	Josh Wu <josh.wu@...el.com>, Ferruh Yigit <fery@...ress.com>,
	Pau Oliva Fora <pof@...ack.org>,
	Ben Dooks <ben-linux@...ff.org>,
	Kukjin Kim <kgene.kim@...sung.com>,
	linux-input@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org
Subject: Re: [PATCH 4/8] input: Remove OOM message after input_allocate_device

On Thu, Oct 24, 2013 at 11:45:39AM -0700, Joe Perches wrote:
> On Thu, 2013-10-24 at 11:37 -0700, Dmitry Torokhov wrote:
> > Hi Joe,
> > 
> > On Wed, Oct 23, 2013 at 12:14:50PM -0700, Joe Perches wrote:
> > > Emitting an OOM message isn't necessary after input_allocate_device
> > > as there's a generic OOM and a dump_stack already done.
> > 
> > No, please don't. The kzalloc may get changed in the future to not dump
> > stack (that was added originally because not everyone was handling OOM
> > properly, right?), input core might get changed to use something else
> > than kzalloc, etc, etc.
> > 
> > The majority of errors use dev_err so we also get idea what device
> > failed (if there are several), and more.
> 
> I think that's not valuable as input_allocate_device already has
> dozens of locations that don't emit a specific OOM and centralizing
> the location for any generic message would work anyway.

Not having diagnostic messages in some of the drivers is hardly a
justification to remove them from everywhere else.

-- 
Dmitry
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