Date: Wed, 25 Feb 1998 22:40:00 -0800 (PST) From: Michael Smith <msmith@FreeBSD.ORG> To: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG, cvs-sys@FreeBSD.ORG Subject: cvs commit: src/sys/ufs/ffs ffs_vnops.c src/sys/ufs/ufs ufs_readwrite.c src/sys/vm vnode_pager.c vnode_pager.h Message-ID: <199802260640.WAA02687@freefall.freebsd.org>
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msmith 1998/02/25 22:40:00 PST
Modified files:
sys/ufs/ffs ffs_vnops.c
sys/ufs/ufs ufs_readwrite.c
sys/vm vnode_pager.c vnode_pager.h
Log:
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)
Revision Changes Path
1.43 +3 -1 src/sys/ufs/ffs/ffs_vnops.c
1.43 +15 -1 src/sys/ufs/ufs/ufs_readwrite.c
1.87 +51 -27 src/sys/vm/vnode_pager.c
1.11 +11 -1 src/sys/vm/vnode_pager.h
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