linux-kernel - Re: decode GFP flags in oom killer output.

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Date:	Thu, 08 Mar 2012 01:18:12 +0100
From:	"Michal Nazarewicz" <mina86@...a86.com>
To:	"Dave Jones" <davej@...hat.com>, "Joe Perches" <joe@...ches.com>
Cc:	"Linux Kernel" <linux-kernel@...r.kernel.org>, linux-mm@...ck.org
Subject: Re: decode GFP flags in oom killer output.

On Thu, 08 Mar 2012 01:04:21 +0100, Joe Perches <joe@...ches.com> wrote:

> On Wed, 2012-03-07 at 18:39 -0500, Dave Jones wrote:
>> +static void decode_gfp_mask(gfp_t gfp_mask, char *out_string)
>> +{
>> +	unsigned int i;
>> +
>> +	for (i = 0; i < 32; i++) {
>
> < sizeof(gfp_t * 8)
>
>> +		if (gfp_mask & (1 << i)) {
>
> (gfp_t)1 << i
>
>> +			if (gfp_flag_texts[i])
>> +				out_string += sprintf(out_string, "%s ", gfp_flag_texts[i]);
>> +			else
>> +				out_string += sprintf(out_string, "reserved! ");
>
> 	not much use to exclamation points.
>
>> +		}
>> +	}
>> +	out_string = "\0";
>
> 	out_string[-1] = 0;

Will break if gfp_mask == 0.

>> +}
>> +

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