netdev - Re: [PATCH] gianfar: reduce stack usage in gianfar

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Message-ID: <1312919835.11924.26.camel@Joe-Laptop>
Date:	Tue, 09 Aug 2011 12:57:15 -0700
From:	Joe Perches <joe@...ches.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	linux-kernel@...r.kernel.org, stufever@...il.com,
	netdev@...r.kernel.org, davem@...emloft.net,
	Wang Shaoyan <wangshaoyan.pt@...bao.com>
Subject: Re: [PATCH] gianfar: reduce stack usage in gianfar_ethtool.c

On Tue, 2011-08-09 at 20:24 +0200, Eric Dumazet wrote:
> Le mardi 09 août 2011 à 11:12 -0700, Joe Perches a écrit :
> > On Tue, 2011-08-09 at 19:59 +0200, Eric Dumazet wrote:
> > > Le mardi 09 août 2011 à 10:52 -0700, Joe Perches a écrit :
> > > > On Tue, 2011-08-09 at 18:53 +0200, Eric Dumazet wrote:
> > > > > Le mercredi 10 août 2011 à 00:39 +0800, stufever@...il.com a écrit :
> > > > []
> > > > > > +	if (!local_rqfpr || !local_rqfcr) {
> > > > > > +		pr_err("Out of memory\n");
> > > > > 	Please remove this pr_err(), kmalloc() will complain already.

I think this is fine and should be kept until
some general agreement is made that OOM messages
should be removed generically.

If these are really superfluous, which I doubt a
little because these are emitted at different
KERN_<LEVEL>, (the generic one emits at KERN_WARNING),
there are _thousands_ of these OOM errors in drivers/
alone that could be removed.

$ grep -rP --include=*.[ch] \
	"(printk|\b[a-z]+_\w+)\s*\(.*\".*(alloc|mem)" drivers | \
  wc -l
5147

call it 50% false positive, it's still a lot.

I think one more won't hurt for awhile.


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