* Question on bdflush
@ 2000-11-14 23:52 Zhiruo Cao
2000-11-15 8:52 ` Peter Samuelson
2000-11-15 9:38 ` Pierre Etchemaite
0 siblings, 2 replies; 3+ messages in thread
From: Zhiruo Cao @ 2000-11-14 23:52 UTC (permalink / raw)
To: linux-kernel
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
2000-11-14 23:52 Question on bdflush Zhiruo Cao
@ 2000-11-15 8:52 ` Peter Samuelson
2000-11-15 9:38 ` Pierre Etchemaite
1 sibling, 0 replies; 3+ messages in thread
From: Peter Samuelson @ 2000-11-15 8:52 UTC (permalink / raw)
To: Zhiruo Cao; +Cc: linux-kernel
[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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^ permalink raw reply [flat|nested] 3+ messages in thread* RE: Question on bdflush
2000-11-14 23:52 Question on bdflush Zhiruo Cao
2000-11-15 8:52 ` Peter Samuelson
@ 2000-11-15 9:38 ` Pierre Etchemaite
1 sibling, 0 replies; 3+ messages in thread
From: Pierre Etchemaite @ 2000-11-15 9:38 UTC (permalink / raw)
To: Zhiruo Cao; +Cc: linux-kernel
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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