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Message-ID: <abcd72470608051013s42ba14e1g8c3289a3e551c7ca@mail.gmail.com> Date: Sat, 5 Aug 2006 10:13:26 -0700 From: "Avinash Ramanath" <avinashr@...il.com> To: "Arjan van de Ven" <arjan@...radead.org> Cc: kernelnewbies@...linux.org, linux-kernel@...r.kernel.org Subject: Re: Zeroing data blocks Hi, I want to do this at the filesystem-level not in user-space. I have a stackable-filesystem that runs as a layer on top of the existing filesystem (with all the function pointers mapped to the corresponding base filesystem function pointers, and other suitable adjustments). So yes I have access to the filesystem. But the question is how can I access those particular data-blocks? On 8/5/06, Arjan van de Ven <arjan@...radead.org> wrote: > 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 > > > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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