readahead slows down boot

Alexander Heinlein alexander.heinlein at
Sat Mar 29 19:42:38 UTC 2008


I tried to improve my boot time by using readahead. After booting with
"profile" readahead generated /etc/readahead/boot. But now my boot time
increased from 30s to 41s. readahead takes really long during "Reading files
needed to boot...".

bootchart output:
- without readahead:
- with readahead:

1.86GHz CPU, 1024MB RAM, harddisk reaches about 42 MB/sec

What's the reason for this strange result?


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