linux-kernel - Re: Zeroing data blocks

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Message-Id: <1154790620.3054.69.camel@laptopd505.fenrus.org>
Date:	Sat, 05 Aug 2006 17:10:20 +0200
From:	Arjan van de Ven <arjan@...radead.org>
To:	Avinash Ramanath <avinashr@...il.com>
Cc:	kernelnewbies@...linux.org, linux-kernel@...r.kernel.org
Subject: Re: Zeroing data blocks

On Sat, 2006-08-05 at 00:55 -0700, Avinash Ramanath wrote:
> Hi,
> 
> As per your suggestion, if I write a file with zero bits, it would
> remap to other pages, and I might not zero the real pages. So is there
> any other way that I can access the pages that a file is using?

there is an ioctl to find the blocks the file is in.. but still that's
only a snapshot, not a guarantee. What you really need/want is to do
this at the filesystem level, you can't reliably do it above that level.

-- 
if you want to mail me at work (you don't), use arjan (at) linux.intel.com


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