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From: Michael Smith <msmith@FreeBSD.ORG>
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Date: Wed, 25 Feb 1998 22:40:00 -0800 (PST)
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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
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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