Re: New ac patch???

["Petr Vandrovec" <VANDROVE@vc.cvut.cz>]

On 26 Nov 01 at 20:39, Alan Cox wrote:
> > If it will go into mainstream, please change it to config option or
> > something like that. I'm doing 
> > 
> > for a in /dev/hd[a-z]; do hdparm -Y $a; done
> 
> Thats somewhat undefined in its behaviour. You might also page after the
> hdparm -Y

cat /sbin/halt > /dev/null
cat /bin/sleep > /dev/null
for a in /dev/hd[a-z]; do /sbin/hdparm -Y $a; done
/bin/sleep 1
/sbin/halt -d -f -i -p -h

works without a glitch - libc & co. is already in memory due to running
other code, hdparm is read during first pass through the loop, and cat 
brings /sbin/halt into the memory. And as root filesystem is mounted 
read-only at that time, there are of course no atime updates pending from 
these accesses.
                                        Best regards,
                                            Petr Vandrovec
                                            vandrove@vc.cvut.cz