Re: 2.4 kernel tweaking
On Mon, Oct 14, 2002 at 09:20:27AM +0200, Harald Staub wrote:
> This is probably stupid, but I am quite happy with the following
> "solution". I hacked the source. The 5 second commit interval is hardcoded
> in
>
> fs/jbd/journal.c:
>
> journal->j_commit_interval = (HZ * 5);
>
> I changed 5 to 300. What I think this means is that I may loose 5 minutes
> of work, which is acceptible for me, but crash recovery is fast. Since I
In recent kernel (2.4.20pre...), an option (commit) is available.
> have crashes only when experimenting with the kernel, I think this is not
> as bad as it might look at first glance. But, you know, no guarantees of
> mine, your filesystem might become garbled, your hard disk might become
> fried!
In my opinion this is not a solution. First I am still not convinced
that it is normal for ext3 to touch the disk when there is no other
activity on the system. Then spinning the disk for 5 minutes seems very
bad from the powersaving point of view and also from the life of the HD.
That said if you have done nothing else, I am not sure if your disk
enter in a powersaving state. Have you tweaked it with hdparm or are you
using noflushd?
Christophe
> Harry
>
>
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--
Christophe Barbé <christophe.barbe@ufies.org>
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A qui sait comprendre, peu de mots suffisent.
(Intelligenti pauca.)
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