Re: [PATCH 0/2] squashfs: support linear addressing

[Vyacheslav Dubeyko <slava@dubeyko.com>]

Hi,

By the way, what about reliability of your solution? I mean possible
bit-flips, bad blocks in the case of "pure" NAND. Maybe, I am not fully
familiarize with your solution but I worry about reliability issues.

And what about MTD layer API? Why do you not use MTD layer in your
solution?

With the best regards,
Vyacheslav Dubeyko.


On Tue, 2012-05-15 at 20:33 +0900, UCHINO Satoshi wrote:
> This patchset enables the SquashFS driver to load data directly from a
> linear adressed memory range (usually non volatile memory like flash)
> instead of going through the block device layer.  This saves some
> memory since no intermediate buffering is necessary.
> 
> The location of the SquashFs image need to be specified by using the
> physaddr=0x******** mount option.
> For example,
>   mount -t squashfs_linear -o physaddr=0x100000 none /mnt
> 
> In addition, the linear SquashFS image can be used as a root file
> system.  To actually have the kernel mount this SquashFS image as a
> root file system, you must also pass the command line parameter
> "root=/dev/null", "rootfstype=squashfs_linear", and
> "rootflags=physaddr=0x********" to the kernel (replace 0x******** with
> the physical address location of the linear SquashFs image to boot
> with).
> 
> UCHINO Satoshi (2):
>   squashfs: add an extra argument to decompress callback
>   squashfs: support linear addressing
> 
>  fs/squashfs/Kconfig          |   25 +++++++
>  fs/squashfs/block.c          |   72 ++++++++++++++++++---
>  fs/squashfs/decompressor.h   |    6 +-
>  fs/squashfs/inode.c          |   10 +++
>  fs/squashfs/lzo_wrapper.c    |   12 +++-
>  fs/squashfs/squashfs.h       |    5 ++
>  fs/squashfs/squashfs_fs_sb.h |    2 +
>  fs/squashfs/super.c          |  144 +++++++++++++++++++++++++++++++++++++++---
>  fs/squashfs/xz_wrapper.c     |    7 ++-
>  fs/squashfs/zlib_wrapper.c   |    7 ++-
>  10 files changed, 265 insertions(+), 25 deletions(-)
> --
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