From mboxrd@z Thu Jan 1 00:00:00 1970 From: Phillip Susi Subject: Re: 16 TB filesystem limit on 32bit machine Date: Mon, 20 Feb 2012 16:17:31 -0500 Message-ID: <4F42B86B.60706@ubuntu.com> References: <4F4279F1.8060805@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Rabeeh Khoury , linux-ext4@vger.kernel.org To: Eric Sandeen Return-path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.120]:27311 "EHLO cdptpa-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754478Ab2BTVRd (ORCPT ); Mon, 20 Feb 2012 16:17:33 -0500 In-Reply-To: <4F4279F1.8060805@redhat.com> Sender: linux-ext4-owner@vger.kernel.org List-ID: -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 2/20/2012 11:50 AM, Eric Sandeen wrote: > fs metadata is mapped into an address space, IIRC, so can't be > addressed past 2^32 pages. Also, mkfs can't do buffered IO to the > device past 16T (it is writing to a device _file_) and ditto for > e2fsck. But the file is only used for open(), after that the IO is handled by the correct device driver, which handles 64 bit offsets ( when you have CONFIG_LBDAF on ). So if you can change the page cache index size ( and it doesn't blow up ) this should work fine. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJPQrhrAAoJEJrBOlT6nu75yX8IAKNmJv0tH2CMWefUFV/4un0g NKU5L2uwuMmyAzVRUOv165d1KAJkNc0z3OLUyh3425yku6wQ4dDqqnWSHCIZHJs7 /d1ltEP1g/vhpM5keAwwWHfC7N2KL+FRyqze8YAe6Qx5GGEWlUOqK2ALSxtuL2Il TQ+lfLI9kAA5Ggtwf6mjjD/fKFTdJILQuZikxpJRfKasLg/4Y25LWdaPG8BOm78l qPxkazpmIG8HVFczHwVWpuu+xY8nAmgDdZCTJBFoK9xmBUO0kjzl8JlAl4ScaXdi v1793CSzev/2aIhEwXSK0HdI7e6KI4iT292/k4ryjfwJ+QX5L6eyfd4HlSVMM88= =IOG0 -----END PGP SIGNATURE-----