From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: [PATCH] [RFC] LBD fixes for Linux 2.6.10 [2/2]
Date: Thu, 13 Jan 2005 18:54:54 +0000
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References: <05Jan11.134911est.333426@cyborg.cybernetics.com> <20050113184302.GC30982@parcelfarce.linux.theplanet.co.uk>
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Cc: Tony Battersby <tonyb@cybernetics.com>,
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To: Matthew Wilcox <matthew@wil.cx>
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On Thu, Jan 13, 2005 at 06:43:02PM +0000, Matthew Wilcox wrote:
> That's actually not wise.  For ext3, the block numbers _on disc_
> are 32-bit in size, so making them sector_t in memory is just a waste.
> reiserfs seems to be the same.  OTOH, XFS does use 64-bit blocks on disc,
> so should use an explicitly 64-bit size in memory too.

XFS has compile-time switches for 32/64 bit in memory.  On Linux it's
64bit with either a 64bit host or CONFIG_LBD.