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From: Alan Cox <alc@FreeBSD.org>
Date: Sun, 2 May 2010 17:33:46 +0000 (UTC)
To: cvs-src-old@freebsd.org
X-FreeBSD-CVS-Branch: HEAD
Subject: cvs commit: src/sys/fs/tmpfs tmpfs_vnops.c src/sys/kern vfs_bio.c
 src/sys/vm vm_fault.c vm_page.c
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alc         2010-05-02 17:33:46 UTC

  FreeBSD src repository

  Modified files:
    sys/fs/tmpfs         tmpfs_vnops.c 
    sys/kern             vfs_bio.c 
    sys/vm               vm_fault.c vm_page.c 
  Log:
  SVN rev 207530 on 2010-05-02 17:33:46Z by alc
  
  It makes no sense for vm_page_sleep_if_busy()'s helper, vm_page_sleep(),
  to unconditionally set PG_REFERENCED on a page before sleeping.  In many
  cases, it's perfectly ok for the page to disappear, i.e., be reclaimed by
  the page daemon, before the caller to vm_page_sleep() is reawakened.
  Instead, we now explicitly set PG_REFERENCED in those cases where having
  the page persist until the caller is awakened is clearly desirable.  Note,
  however, that setting PG_REFERENCED on the page is still only a hint,
  and not a guarantee that the page should persist.
  
  Revision  Changes    Path
  1.35      +27 -3     src/sys/fs/tmpfs/tmpfs_vnops.c
  1.572     +10 -1     src/sys/kern/vfs_bio.c
  1.270     +6 -0      src/sys/vm/vm_fault.c
  1.387     +16 -9     src/sys/vm/vm_page.c