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SubjectRe: [PATCH 2.6.21] cramfs: add cramfs Linear XIP
On 6/6/07, Christoph Hellwig <hch@infradead.org> wrote:
> I might be a little late in the discussion, but I somehow missed this
> before. Please don't add this xip support to cramfs, because the
> whole point of cramfs is to be a simple _compressed_ filesystem,
> and we really don't want to add more complexity to it.

I estimate something on the order 5-10 million Linux phones use
something similar to these patches. I wonder if there are that many
provable users of of the simple cramfs. This is where the community
has taken cramfs.

Nevertheless, I understand your point. I wrote AXFS in part because
the hacks required to do XIP on cramfs where ugly, hacky, and complex.
Please review the latest patch in the thread, it's just a draft but
the changes required are not very complex now, especially in light of
the filemap_xip.c APIs being used. It just happens not to work, yet.

> Please
> use something like the existing ext2 xip mode instead of add support
> to romfs using the generic filemap methods.

What?? You mean like use xip_file_mmap() and implement
get_xip_page()? Did you read my latest patch?
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