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| author | msmith <msmith@FreeBSD.org> | 1998-02-26 06:39:59 +0000 |
|---|---|---|
| committer | msmith <msmith@FreeBSD.org> | 1998-02-26 06:39:59 +0000 |
| commit | 15e6194107ac825d2decda9954710a2fbbbe591d (patch) | |
| tree | 455b67168529813206d6fd3225edcad28f7e615c /sys/vm/vnode_pager.h | |
| parent | abb797303f8a1c9c501930df5cee82ba24bbc3a0 (diff) | |
| download | FreeBSD-src-15e6194107ac825d2decda9954710a2fbbbe591d.zip FreeBSD-src-15e6194107ac825d2decda9954710a2fbbbe591d.tar.gz | |
In the author's words:
These diffs implement the first stage of a VOP_{GET|PUT}PAGES pushdown
for local media FS's.
See ffs_putpages in /sys/ufs/ufs/ufs_readwrite.c for implementation
details for generic *_{get|put}pages for local media FS's. Support
is trivial to add for any FS that formerly relied on the default
behaviour of the vnode_pager in in EOPNOTSUPP cases (just copy the
ffs_getpages() code for the FS in question's *_{get|put}pages).
Obviously, it would be better if each local media FS implemented a
more optimal method, instead of calling an exported interface from
the /sys/vm/vnode_pager.c, but this is a necessary first step in
getting the FS's to a point where they can be supplied with better
implementations on a case-by-case basis.
Obviously, the cd9660_putpages() can be rather trivial (since it
is a read-only FS type 8-)).
A slight (temporary) modification is made to print a diagnostic message
in the case where the underlying filesystem attempts to engage in the
previous behaviour. Failure is likely to be ungraceful.
Submitted by: terry@freebsd.org (Terry Lambert)
Diffstat (limited to 'sys/vm/vnode_pager.h')
| -rw-r--r-- | sys/vm/vnode_pager.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/sys/vm/vnode_pager.h b/sys/vm/vnode_pager.h index c7a0c9b..4402e14 100644 --- a/sys/vm/vnode_pager.h +++ b/sys/vm/vnode_pager.h @@ -36,7 +36,7 @@ * SUCH DAMAGE. * * @(#)vnode_pager.h 8.1 (Berkeley) 6/11/93 - * $Id$ + * $Id: vnode_pager.h,v 1.10 1997/02/22 09:48:43 peter Exp $ */ #ifndef _VNODE_PAGER_ @@ -46,6 +46,16 @@ vm_object_t vnode_pager_alloc __P((void *, vm_size_t, vm_prot_t, vm_ooffset_t)); void vnode_pager_freepage __P((vm_page_t m)); struct vnode *vnode_pager_lock __P((vm_object_t)); + +/* + * XXX Generic routines; currently called by badly written FS code; these + * XXX should go away soon. + */ +int vnode_pager_generic_getpages __P((struct vnode *vp, vm_page_t *m, + int count, int reqpage)); +int vnode_pager_generic_putpages __P((struct vnode *vp, vm_page_t *m, + int count, boolean_t sync, + int *rtvals)); #endif #endif /* _VNODE_PAGER_ */ |
