Re: page flags ?

Badari Pulavarty [off-list ref] wrote:

Does anyone know what this page-flag is used for ? I see some
references to this in AFS. 

Is it possible for me to use this for my own use in ext3 ? 
(like delayed allocations ?) Any generic routines/VM stuff
expects me to use this only for a specific purpose ?

#define PG_fs_misc               9      /* Filesystem specific bit */

It's identical to PG_checked, added by David Howells'
provide-a-filesystem-specific-syncable-page-bit.patch

IIRC we decided to expand the definition of PG_checked to mean
"a_ops-private, fs-defined page flag".  I guess if/when that patch is
merged we'll do a kernel-wide s/PG_checked/PG_fs_misc/.

And ext3 is already using that flag.
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