Re: Full boot in 45s, 3 possible improvements (for Jaunty Jackalope 9.04?)

2008-09-15 Thread Phillip Susi
Krzysztof Lichota wrote:
> 2008/9/15 Andre Mussche <[EMAIL PROTECTED]>:
>> I want to try to use e2defrag on my ext3 disk, to try to reorder the
>> bootfiles (of the readahead list),
>> so less head movements.
> 
> e2defrag is dangerous, can destroy your data, and should not be used.
> See http://marc.info/?l=ext3-users&m=116231468911590&w=2


FUD and needless paranoia should be avoided.  While there is always a 
chance something like this can go wrong, you always keep backups right? 
  Right?

A while back I made a few patches to the ubuntu e2defrag to make it work 
properly on ext3 and stress tested it quite a bit on a small test 
filesystem with no issues, so using it SHOULD be fine.



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Re: Full boot in 45s, 3 possible improvements (for Jaunty Jackalope 9.04?)

2008-09-15 Thread Oliver Grawert
hi,
On Mo, 2008-09-15 at 15:57 +0200, Andre Mussche wrote:


> But I do not know how to optimize udev/modprobe and gnome?
i plan to work on some improved scripts for the modprobe issue in
jaunty, what you can do today is to provide a fixed list of modules
in /etc/initramfs-tools/modules, that speeds up the probing stuff
already ...
one (really evil) option that can go hand in hand with such a hardcoded
list is to disable /etc/udev/rules.d/90-modprobe.rules in initramfs and
enable it later again, that way you can get rid of *all* modprobing at
boot (but mind you it really needs a working module list) ... that can
gain you massive speedups but indeed makes you lose a lot of
flexibility ... 

(dont do that at home if you dont know what you're doing )

i will write a spec to discuss a possible enhanced profiling mode with
something similar for the UDS and will announce it here before
mountainview ... 

ciao
oli



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Re: Full boot in 45s, 3 possible improvements (for Jaunty Jackalope 9.04?)

2008-09-15 Thread Krzysztof Lichota
2008/9/15 Andre Mussche <[EMAIL PROTECTED]>:
> I want to try to use e2defrag on my ext3 disk, to try to reorder the
> bootfiles (of the readahead list),
> so less head movements.

e2defrag is dangerous, can destroy your data, and should not be used.
See http://marc.info/?l=ext3-users&m=116231468911590&w=2

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Krzysztof Lichota

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