On Fri, Oct 05, 2007 at 04:02:21PM -0400, Dave Jones wrote: > Right now we're running readahead early way too late. > At a time when we've just sat doing no IO at all for 10 > seconds whilst (amongst other things) we waited for a > DHCP lease. We're also running it at a time when > we're competing for disk bandwidth with other processes. > The result is that disabling the service completely shows > no change in boot time at all. > http://www.codemonkey.org.uk/junk/bootchart-before.png > > Moving the readahead_early service to start really early > wins back 4 seconds of boot up time. > http://www.codemonkey.org.uk/junk/bootchart-after.png Please, define "really early". I have (workstation, F7, 2GB RAM): - /etc/rc5.d/S01readahead_early - /etc/readahead.d/custom.early (generated by readahead-collector from F8) - only one readahaed list (merged .early and .later lists) results (readahead on/off): http://people.redhat.com/kzak/readahead/f7-on.png http://people.redhat.com/kzak/readahead/f7-off.png .. so nothing useful :-( > Any reason not to change this for F8 ? I don't believe that readahead is able to really improve Fedora boot time. Karel -- Karel Zak <kzak@xxxxxxxxxx> -- fedora-devel-list mailing list fedora-devel-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-devel-list
