linux-kernel - Re: [PATCH v2 01/10] DMA, CMA: clean-up log message

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Date:	Thu, 12 Jun 2014 10:55:32 +0200
From:	Michal Nazarewicz <mina86@...a86.com>
To:	Joonsoo Kim <iamjoonsoo.kim@....com>,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Minchan Kim <minchan@...nel.org>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Gleb Natapov <gleb@...nel.org>, Alexander Graf <agraf@...e.de>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	kvm@...r.kernel.org, kvm-ppc@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v2 01/10] DMA, CMA: clean-up log message

>> Joonsoo Kim <iamjoonsoo.kim@....com> writes:
>> 
>> > We don't need explicit 'CMA:' prefix, since we already define prefix
>> > 'cma:' in pr_fmt. So remove it.
>> >
>> > And, some logs print function name and others doesn't. This looks
>> > bad to me, so I unify log format to print function name consistently.
>> >
>> > Lastly, I add one more debug log on cma_activate_area().
>> >
>> > Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@....com>
>> >
>> > diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c
>> > index 83969f8..bd0bb81 100644
>> > --- a/drivers/base/dma-contiguous.c
>> > +++ b/drivers/base/dma-contiguous.c
>> > @@ -144,7 +144,7 @@ void __init dma_contiguous_reserve(phys_addr_t limit)
>> >  	}
>> >
>> >  	if (selected_size && !dma_contiguous_default_area) {
>> > -		pr_debug("%s: reserving %ld MiB for global area\n", __func__,
>> > +		pr_debug("%s(): reserving %ld MiB for global area\n", __func__,
>> >  			 (unsigned long)selected_size / SZ_1M);

> On Thu, Jun 12, 2014 at 10:11:19AM +0530, Aneesh Kumar K.V wrote:
>> Do we need to do function(), or just function:. I have seen the later
>> usage in other parts of the kernel.

On Thu, Jun 12 2014, Joonsoo Kim <iamjoonsoo.kim@....com> wrote:
> I also haven't seen this format in other kernel code, but, in cma, they use
> this format as following.
>
> function(arg1, arg2, ...): some message
>
> If we all dislike this format, we can change it after merging this
> patchset. Until then, it seems better to me to leave it as is.

I used “function(arg1, arg2, …)” at the *beginning* of functions when
the arguments passed to the function were included in the message.  In
all other cases I left it at just “function:” (or just no additional
prefix).  IMO that's a reasonable strategy.

-- 
Best regards,                                         _     _
.o. | Liege of Serenely Enlightened Majesty of      o' \,=./ `o
..o | Computer Science,  Michał “mina86” Nazarewicz    (o o)
ooo +--<mpn@...gle.com>--<xmpp:mina86@...ber.org>--ooO--(_)--Ooo--
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