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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Thu, 27 Jan 2011 16:10:25 +0000 (UTC)
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Subject: cvs commit: src/sys/dev/md md.c
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kib         2011-01-27 16:10:25 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/md           md.c 
  Log:
  SVN rev 217946 on 2011-01-27 16:10:25Z by kib
  
  Add support for BIO_DELETE on swap-backed md(4). In the case of BIO_DELETE
  covering the whole page, free the page. Otherwise, clear the region and
  mark it clean. Not marking the page dirty could reinstantiate cleared
  data, but it is allowed by BIO_DELETE specification and saves unneeded
  write to swap.
  
  Reviewed by:    alc
  Tested by:      pho
  MFC after:      2 weeks
  
  Revision  Changes    Path
  1.196     +10 -6     src/sys/dev/md/md.c