linux-kernel - Re: [PATCH] coredump: fix wrong comments on core limits of pipe coredump case

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Date:	Mon, 22 Aug 2011 15:32:44 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	bookjovi@...il.com
Cc:	viro@...iv.linux.org.uk, linux-kernel@...r.kernel.org,
	Neil Horman <nhorman@...driver.com>
Subject: Re: [PATCH] coredump: fix wrong comments on core limits of pipe
	coredump case

Ah, I thought you are going to re-do this patch...

On 08/22, bookjovi@...il.com wrote:
>
> Only core limit 1 can skip dump in ispipe case, not 0.

Yes, but this is (almost) internal hack we use to avoid the recursive
crashes.

> --- a/fs/exec.c
> +++ b/fs/exec.c
> @@ -2163,7 +2163,7 @@ void do_coredump(long signr, int exit_code, struct pt_regs *regs)
>  			 * we're not writing to the file system, but we use
>  			 * cprm.limit of 1 here as a speacial value. Any
>  			 * non-1 limit gets set to RLIM_INFINITY below, but
> -			 * a limit of 0 skips the dump.  This is a consistent
> +			 * a limit of 1 skips the dump.  This is a consistent

I'd suggest to simple remove the "skips the dump" part.

To me, we can also remove the "Note that we use task_tgid_vnr" part,
but feel free to ignore. Every user of task_tgid_vnr() could have the
same comment.

Oleg.

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