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Date:	Thu, 19 Jun 2014 13:51:45 -0700
From:	Andrew Morton <>
To:	James Bottomley <>
Cc:	"Cox, Alan" <>,
	"" <>,
	"" <>,
	"" <>,
	Al Viro <>
Subject: Re: Cannot partition 32GB disk on a 32bit machine (correct version
 of the patch this time)

On Thu, 19 Jun 2014 11:43:57 -0700 James Bottomley <> wrote:

> Do you have CONFIG_LBD turned on?  That's supposed to let us go up to
> about 16TB before we run out of page index bits.  If you do, we might
> have a variable that's int but should be sector_t somewhere.

I assume the problem is that iov_iter uses size_t (which is 32-bit on
32-bit) and we're trying to use iov_iter for blockdevs.

All this code is new and I've NFI how it's supposed to work and cannot
find a description anywhere.

cc's viro and runs away.
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