Re: [RFC][PATCH] Rename PageChecked as PageMiscFS

Daniel Phillips [off-list ref] wrote:

This filesystem-specific flag needs to be prevented from escaping into other
subsystems that might interact, such as VM.  The current usage is mainly
for directories, except for Reiser4, which uses it for journalling
..
+	SetPageMiscFS(page);

Can you please retain the *PageFsMisc names I've been using in my stuff?

In my opinion putting the "Fs" bit first gives a clearer indication that this
is a bit exclusively for the use of filesystems in general.

+#define PG_fs_misc		 8	/* don't let me spread */

Should perhaps be:

  +#define PG_fs_misc		 8	/* for internal filesystem use only */

and NFS, which presses it into service in a network cache coherency role.

The patches to make the AFS filesystem use it were removed, pending a release
of updated filesystem caching patches.

The NFS filesystem patches that use it haven't yet found there way into
Andrew's tree, but are also being held pending FS-Cache being updated.

If you wish, I will send the FS-Cache patch, the AFS patch and the NFS patch
to Andrew so that you can see. CacheFS needs more work, however, before that
can be re-released.

David
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