Date: Thu, 31 Jan 2008 01:04:00 -0000 From: "Steven Hartland" <killing@multiplay.co.uk> To: "Dieter" <freebsd@sopwith.solgatos.com> Cc: freebsd-performance@freebsd.org, freebsd-stable@freebsd.org Subject: Re: newfs locks entire machine for 20seconds Message-ID: <013201c863a5$2a91a1c0$b6db87d4@multiplay.co.uk> References: <200801302307.XAA22476@sopwith.solgatos.com>
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----- Original Message -----
From: "Dieter" <freebsd@sopwith.solgatos.com>
> What *exactly* do you mean by
>
>> machine still locks up with no activity for anywhere from 20 to 30 seconds.
>
> Is there disk activity? (e.g. activity light(s) flashing if you have them)
Cant tell if there is disk activity its in a DC miles away ;)
> Does top continue to update the screen during the 20-30 seconds?
>
> I'm thinking that newfs has queued up a bunch of disk i/o, and other
> disk i/o gets locked out, but activities that don't require any disk i/o
> (like top, once it is up and running) could continue. Is that what is
> happening?
No all sessions totally freeze. I have top set to 1 second refreshes and
the clock literally stops and then 20-30 seconds later continues. All
sessions are via ssh not X if that's of interest.
I could understand if IO to disk for other processes became slow but
everything including things like top just stop which is quite odd and
concerning.
Regards
Steve
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