linux-kernel - Re: [PATCH 00/11] mm: debug: formatting memory management structs

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Message-ID: <555504F3.5020209@oracle.com>
Date:	Thu, 14 May 2015 16:26:27 -0400
From:	Sasha Levin <sasha.levin@...cle.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	kirill@...temov.name
Subject: Re: [PATCH 00/11] mm: debug: formatting memory management structs

On 05/14/2015 04:24 PM, Andrew Morton wrote:
> On Thu, 14 May 2015 13:10:03 -0400 Sasha Levin <sasha.levin@...cle.com> wrote:
> 
>> > This patch series adds knowledge about various memory management structures
>> > to the standard print functions.
>> > 
>> > In essence, it allows us to easily print those structures:
>> > 
>> > 	printk("%pZp %pZm %pZv", page, mm, vma);
>> > 
>> > This allows us to customize output when hitting bugs even further, thus
>> > we introduce VM_BUG() which allows printing anything when hitting a bug
>> > rather than just a single piece of information.
>> > 
>> > This also means we can get rid of VM_BUG_ON_* since they're now nothing
>> > more than a format string.
> A good set of example output would help people understand this proposal.

That would be the equivalent of doing:

	dump_page(page);
	dump_mm(mm);
	dump_vma(vma);

I'll add a few example usages in.


Thanks,
Sasha
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