Messages in this thread | | | Date | Wed, 10 Nov 2004 14:46:33 -0500 | From | Bill Davidsen <> | Subject | Re: [2.6.10-rc1 and prev] System unuseable while writing to disk |
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Prakash K. Cheemplavam wrote: > Hi, > > I have a problem which doesn't seem to be connected to the i/o > schedulers, because all I tested (cfq, deadline, noop) show the same: > > While writing (when the kernel actually commits to hd) my system gets > very unresponsive esp when another app I want to use wants to write > (read?) from hd, as well. This is *not* a UDMA problem (at least no > apparent...)! More specific: > > I wrote this primitive code for writing sequentially:
May I suggest running "vmstat 1" while this is happening? Looking at the waitio time vs. transfer rates might reveal something. If it all looks the same post a small section, if it starts off looking like one thing and then changes as buffers fill, data from start to steady state might assist someone in helping.
I can't say that I see any such thing with ext[23], so it may be a reiser issue and someone else will have to help. Did you look at the logs to see that there are no useful warnings there?
-- -bill davidsen (davidsen@tmr.com) "The secret to procrastination is to put things off until the last possible moment - but no longer" -me
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