linux-kernel - Re: [RFC, PATCH 3/4] elf_core_dump(): make offset calculation and writing processes explicit

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Message-Id: <20091216.112739.104046780.d.hatayama@jp.fujitsu.com>
Date:	Wed, 16 Dec 2009 11:27:39 +0900 (JST)
From:	Daisuke HATAYAMA <d.hatayama@...fujitsu.com>
To:	andi@...stfloor.org
Cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	jdike@...toit.com, tony.luck@...el.com, mhiramat@...hat.com
Subject: Re: [RFC, PATCH 3/4] elf_core_dump(): make offset calculation and
 writing processes explicit

> Daisuke HATAYAMA <d.hatayama@...fujitsu.com> writes:
> >
> > However, the clause 1. is not always possible, since one
> > cannot assume that dump_seek() function always supports
> > the seek in the minus direction. Consider no_llseek.
> 
> Not even forward seek is always supported, consider core dumping
> to a pipe.
> 
> -Andi

I may need to use backward seeking here, not forward. So, I stressed
here for the backward one.

Thanks.
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