Re: QAD patch to speed up lilo

Werner Almesberger (almesber@lrc.epfl.ch)
Wed, 21 Feb 1996 20:48:07 +0100 (MET)

> Quick and dirty patch to last_dev to remember the last
> parent/major/increment result and return the same result if the next
> call is for the same parameters. Cuts readdir/stat calls down by 90%.

Nice try ;-) ftp://lrcftp.epfl.ch/pub/linux/local/lilo/lilo.18dev.tar.gz
achieves the following reductions on one of my machines:

stat 3801 -> 19 (- 99%)
readdir 3783 -> 0 (-100%)
syscalls 8525 -> 934 (- 89%)

The changes are admittedly a bit more complex ...

- Werner

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