[systemd-devel] [PATCH] [RFC][PLEASE TEST] readahead: chunk on spinning media

[Kok, Auke-jan H]

On Mon, Mar 25, 2013 at 9:53 AM, Frederic Crozat <fcrozat at suse.com> wrote:
> Le vendredi 22 mars 2013 à 15:22 -0700, Auke Kok a écrit
>> For a comparison of how before/after bootcharts look (ext4 on a
>> mobile 5400rpm 250GB drive) please look at:
>>
>>     http://foo-projects.org/~sofar/blocked-tests/
>>
>> There are bootcharts in the "before" and "after" folders where you
>> should be able to see that many low-level services finish 5-7
>> seconds earlier with the patch applied (after).
>
> I've checked on my "test" netbook system and I can confirm your findings
> (with ext4 as fs), gain is around 3s, compared to the "old" readahead in
> systemd which was sometime slowing boot by 3s, compared to "no"
> readahead.
>
> I'd say commit it :)

I pushed this right after v199, so folks with ext4 on a spinning drive
have some extra time to compare the results.

Auke