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SubjectRe: extra PG_* bits for page->flags
David Howells <dhowells@redhat.com> wrote:
>
>
> Hi Linus,
>
> I'm writing a cache filesystem for primarily for caching AFS pages, but that
> also can be used for caching other network FS pages (such as NFSv4, which Jeff
> Garzik and Trond Myklebust are interested in, I think).

Is a new fs needed? Is it not possible to use an existing filesystem of the
user's choice for local caching?

> ...
>
> (*) PG_journal
> (*) PG_journalmark

Well. If you new fs goes in then yes, we can spare those bits (just). If
possible, consider making them "opaque address_space-private", so this prime
real estate can be shared with other filesystems (eg, PG_checked).

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