Question on bdflush

Question on bdflush

[Zhiruo Cao]

Hello,

Why does bdflush (kupdated and kflushed) writes to disk periodically even
though the system is apparently idle.  I think if no more new buffers
becomes dirty, kflushed show not write anything to disk.   I'm working
on a notebook, and I found the periodic disk access is very annoying and
consuming a lot of power.

Thanks!

Joe

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Re: Question on bdflush

[Peter Samuelson]

[Zhiruo Cao]
> Why does bdflush (kupdated and kflushed) writes to disk periodically
> even though the system is apparently idle.  I think if no more new
> buffers becomes dirty, kflushed show not write anything to disk.

kill -STOP {your cron process}
mount all ext2 filesystems with '-o noatime' or at least '-o nodiratime'

Lots of other small things can be done to reduce disk access.  I think
you can even 'kill -STOP {kflushd}' (but don't forget to reenable it at
some point).

Peter
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RE: Question on bdflush

[Pierre Etchemaite]

Le 14-Nov-2000, Zhiruo Cao écrivait :
> Why does bdflush (kupdated and kflushed) writes to disk periodically even
> though the system is apparently idle.  I think if no more new buffers
> becomes dirty, kflushed show not write anything to disk.   I'm working
> on a notebook, and I found the periodic disk access is very annoying and
> consuming a lot of power.

Look for noflushd on Freshmeat...


-- 
Linux blade.workgroup 2.4.0-test11 #1 Tue Nov 14 16:44:49 CET 2000 i686 unknown
 10:38am  up 17:34,  2 users,  load average: 1.13, 1.17, 1.17

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