should readahead allow generic paths?
sandeen at redhat.com
Thu Oct 11 14:20:10 UTC 2007
Tony Nelson wrote:
> In any case, readahead does not improve boot time, and unless you can show
> how to make readahead improve boot time, there is unlikely to be any work
> done on making it keep reading all the files after updates. It doesn't
> make booting any slower if readahead can't find its files, or any faster if
> it can.
Well, actually I don't quite agree (see also my "boot-time / readahead
with stock readahead (0:59):
without readahead (0:49):
with tweaked readahead (updated/sorted lists, run earlier) (0:44):
so, it's a small win for me. The approach still feels a bit inelegant
to me, but it does seem to save a bit if it's done properly. But from
above, if it's done wrong, it hurts a lot more than it helps.
Tossing a default list out there and hoping for the best probably won't
work, at any rate.
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