linux-kernel - Re: [PATCH v3 2/2] lib/scatterlist: use page iterator in the mapping iterator

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Date:	Fri, 22 Feb 2013 21:29:09 -0700
From:	Stephen Warren <swarren@...dotorg.org>
To:	Imre Deak <imre.deak@...el.com>
CC:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Maxim Levitsky <maximlevitsky@...il.com>,
	Tejun Heo <tj@...nel.org>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	linaro-mm-sig@...ts.linaro.org,
	"linux-next@...r.kernel.org" <linux-next@...r.kernel.org>
Subject: Re: [PATCH v3 2/2] lib/scatterlist: use page iterator in the mapping
 iterator

On 02/13/2013 08:10 AM, Imre Deak wrote:
> For better code reuse use the newly added page iterator to iterate
> through the pages. The offset, length within the page is still
> calculated by the mapping iterator as well as the actual mapping.
> Idea from Tejun Heo <tj@...nel.org>.

This patch appears in linux-next since next-20130220. It breaks mounting
a root filesystem on an SD card on the Raspberry Pi ARM platform, with
errors such as those shown below.

next-20130222 with just this patch reverted works fine.

> [    0.708426] VFS: Mounted root (ext4 filesystem) on device 179:2.
> [    0.723742] devtmpfs: mounted
> [    0.733064] Freeing init memory: 204K
> [    0.777992] EXT4-fs error (device mmcblk0p2): ext4_iget:3814: inode #4259: comm swapper: bad extra_isize (57200 != 256)
> [    0.815172] EXT4-fs error (device mmcblk0p2): ext4_lookup:1428: inode #8198: comm swapper: deleted inode referenced: 487
> [    0.826179] Kernel panic - not syncing: No init found.  Try passing init= option to kernel. See Linux Documentation/init.txt for guidance.

> [    0.719365] VFS: Mounted root (ext4 filesystem) on device 179:2.
> [    0.740918] devtmpfs: mounted
> [    0.745219] Freeing init memory: 204K
> ERROR: ld.so: object '/usr/lib/arm-linux-gnueabihf/libcofi_rpi.so' from /etc/ld.so.preload cannot be preloaded: ignored.
> [    0.906840] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b

> [    0.724018] VFS: Mounted root (ext4 filesystem) on device 179:2.
> [    0.739404] devtmpfs: mounted
> [    0.748741] Freeing init memory: 204K
> [    0.793603] EXT4-fs error (device mmcblk0p2): ext4_iget:3814: inode #4259: comm swapper: bad extra_isize (57200 != 256)
> [    0.822138] Kernel panic - not syncing: No init found.  Try passing init= option to kernel. See Linux Documentation/init.txt for guidance.


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