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Date: Thu, 28 Dec 2000 06:50:20 +0100
From: Jamie Lokier <lk@tantalophile.demon.co.uk>
To: Al Peat <al_kernel@yahoo.com>
Cc: linux-kernel@vger.kernel.org, myself <al_peat@yahoo.com>,
        Juri Haberland <juri.haberland@innominate.com>
Subject: Re: Purging the Page Table (was: Purging the Buffer Cache)
Message-ID: <20001228065020.B4578@thefinal.cern.ch>
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Al Peat wrote:
> > >   Is there any way to completely purge the buffer
> > > cache -- not just the write requests (ala 'sync'
> > or
> > > 'update'), but the whole thing?  Can I just call
> > > invalidate_buffers() or destroy_buffers()?

Try this script:

case "`id -u`" in
  0) ;;
  *) echo Only root can run this script. 1>&2; exit 1 ;;
esac

mount | sort -k3 -r | \
while read dev ON dir TYPE type etc; do
  echo mount $dir -o remount
  mount $dir -o remount
done

mount | sort -k1 | \
while read dev ON dir TYPE type etc; do
  case "$dev" in
    /dev/*) echo hdparm -f $dev
      hdparm -f $dev >/dev/null ;;
  esac
done

-- Jamie
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