From owner-cvs-all  Sat Nov 25 18:55:19 2000
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From: Matt Dillon <dillon@FreeBSD.org>
Date: Sat, 25 Nov 2000 18:55:15 -0800 (PST)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/kern vfs_bio.c vfs_cluster.c vfs_subr.c
         vfs_vnops.c src/sys/sys buf.h vnode.h src/sys/ufs/ffs ffs_inode.c
         ffs_softdep.c src/sys/ufs/ufs ufs_readwrite.c src/sys/vm
         swap_pager.c vm_page.c vm_page.h vm_pageout.c
X-FreeBSD-CVS-Branch: RELENG_4
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Precedence: bulk
X-Loop: FreeBSD.ORG

dillon      2000/11/25 18:55:15 PST

  Modified files:        (Branch: RELENG_4)
    sys/kern             vfs_bio.c vfs_cluster.c vfs_subr.c 
                         vfs_vnops.c 
    sys/sys              buf.h vnode.h 
    sys/ufs/ffs          ffs_inode.c ffs_softdep.c 
    sys/ufs/ufs          ufs_readwrite.c 
    sys/vm               swap_pager.c vm_page.c vm_page.h 
                         vm_pageout.c 
  Log:
  MFC the major low memory deadlock solution.  This patch removes most of
  the preexisting low-memory-handling hacks and replaces it with a relatively
  simple concept:  The entire I/O path (except networking) is allowed to dig
  into the system memory reserve but will effectively free resources rather
  then leave them wired/cached if the system is found to be in a low-memory
  situation, thus allowing I/O to continue to operate.
  
  This patch also fixes a  VXLOCK self-deadlock and generates a message
  if it detects what used to be the deadlock.  (this also MFCd)
  
  Finally, this patch removes code related to the case where the original
  page could not be found during bogus page recovery and replaces it with a
  panic.  The original page had better still exist since we have an extra
  reference on it and on the VM object during the I/O.  (this also MFCd)
  
  Revision   Changes    Path
  1.242.2.4  +92 -62    src/sys/kern/vfs_bio.c
  1.92.2.2   +7 -1      src/sys/kern/vfs_cluster.c
  1.249.2.7  +11 -5     src/sys/kern/vfs_subr.c
  1.87.2.4   +4 -2      src/sys/kern/vfs_vnops.c
  1.88.2.2   +2 -1      src/sys/sys/buf.h
  1.111.2.3  +2 -1      src/sys/sys/vnode.h
  1.56.2.1   +4 -1      src/sys/ufs/ffs/ffs_inode.c
  1.57.2.5   +20 -18    src/sys/ufs/ffs/ffs_softdep.c
  1.65.2.3   +5 -1      src/sys/ufs/ufs/ufs_readwrite.c
  1.130.2.7  +4 -2      src/sys/vm/swap_pager.c
  1.147.2.4  +30 -7     src/sys/vm/vm_page.c
  1.75.2.4   +3 -1      src/sys/vm/vm_page.h
  1.151.2.5  +98 -74    src/sys/vm/vm_pageout.c



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