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Date: Sat, 30 Nov 1996 14:41:51 -0800 (PST)
From: John Dyson <dyson>
Message-Id: <199611302241.OAA10690@freefall.freebsd.org>
To: CVS-committers, cvs-all, cvs-sys
Subject: cvs commit:  src/sys/sys buf.h param.h src/sys/vm vm_fault.c vm_map.c vm_map.h vm_pager.c src/sys/kern vfs_bio.c vfs_cluster.c
Sender: owner-cvs-sys@FreeBSD.ORG
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dyson       96/11/30 14:41:50

  Modified:    sys/sys   buf.h param.h
               sys/kern  vfs_bio.c vfs_cluster.c
               sys/vm    vm_fault.c vm_map.c vm_map.h vm_pager.c
  Log:
  Implement a new totally dynamic (up to MAXPHYS) buffer kva allocation
  scheme.  Additionally, add the capability for checking for unexpected
  kernel page faults.  The maximum amount of kva space for buffers hasn't
  been decreased from where it is, but it will now be possible to do so.
  
  This scheme manages the kva space similar to the buffers themselves.  If
  there isn't enough kva space because of usage or fragementation, buffers
  will be reclaimed until a buffer allocation is successful.  This scheme
  should be very resistant to fragmentation problems until/if the LFS code
  is fixed and uses the bogus buffer locking scheme -- but a 'fixed' LFS
  is not likely to use such a scheme.
  
  Now there should be NO problem allocating buffers up to MAXPHYS.
  
  Revision  Changes    Path
  1.35      +3 -1      src/sys/sys/buf.h
  1.17      +3 -6      src/sys/sys/param.h
  1.107     +80 -20    src/sys/kern/vfs_bio.c
  1.39      +9 -1      src/sys/kern/vfs_cluster.c
  1.58      +7 -8      src/sys/vm/vm_fault.c
  1.58      +6 -1      src/sys/vm/vm_map.c
  1.16      +4 -3      src/sys/vm/vm_map.h
  1.25      +20 -13    src/sys/vm/vm_pager.c