linux-kernel - Re: [Patch 3/3] elf: use a macro instead of a raw number

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Date:	Thu, 02 Jul 2009 17:38:41 +0800
From:	Amerigo Wang <amwang@...hat.com>
To:	Roland McGrath <roland@...hat.com>
CC:	linux-kernel@...r.kernel.org,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Serge Hallyn <serue@...ibm.com>,
	David Howells <dhowells@...hat.com>,
	James Morris <jmorris@...ei.org>,
	linux-fsdevel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [Patch 3/3] elf: use a macro instead of a raw number

Roland McGrath wrote:
>> Use TASK_COMM_LEN instead of the raw number 16.
>>     
>
> This is probably a bad idea.  elf_prpsinfo layout is a userland ABI.
> AFAIK there is no reason TASK_COMM_LEN could not be enlarged in the kernel.
>   

Thanks for your reply.

But in the kernel code, pr_fname is copied from ->comm, they should
be equal, shouldn't they?

Hmm, yes, I agree that 16 is too small for ELF core dump, the longer
names get truncated and gdb will complain about this...

I can cook a patch to increase this length if you agree.

Thanks.

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