Re: kupdate, high CPU usage

From: Pavel Machek (pavel@suse.cz)
Date: Fri Aug 11 2000 - 04:27:48 EST


HI!

> >Disabling kupdate or kflushd is dangerous to your data
>
> Disabling kflushd can impact the stabiliy of the system.
>
> Disabling kupdate is useful on the airplane to save battery power 8). (do
> it at your own risk of course)

Unfortunately, disabling kupdate for saving power has some problems:
it is all-disks-being synced or no-disks-being-synced. I'd like to
save power on hda, but not on sda which is on external power anyway
(usb zip).

I tried to make my own flushed using fsync("/dev/sda"), but it just
will not work; fsync("/dev/sda1"), fsync("/dev/sda2"), ... would be
needed due to aliasing issues. It gets ugly.

Would it be possible to tell kupdate not to do updates on /dev/hda?
                                                                Pavel

-- 
I'm pavel@ucw.cz. "In my country we have almost anarchy and I don't care."
Panos Katsaloulis describing me w.r.t. patents at discuss@linmodems.org

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