Re: FreeBSD 5.3 freezes under heavy hdd load

From: Brian Reichert (reichert_at_numachi.com)
Date: 03/07/05

  • Next message: Don Lewis: "Re: I can not surf on Flash powered sites." 
    Date: Mon, 7 Mar 2005 16:05:39 -0500
To: Kris Kennaway <kris@FreeBSD.org>

    On Mon, Mar 07, 2005 at 05:12:44PM +0000, Kris Kennaway wrote:
    > It is necessary to increase KSTACK_PAGES (e.g. to 4) on machines with
    > certain patterns of heavy disk write load to avoid double faults in
    > the softupdates code (softupdates has potentially unbounded call stack
    > and can overflow the default kernel stack size without too much
    > effort).

    Can these 'certain patterns' be characterized? I've got a system
    that hangs on haavy rsync usage, where the file sizes can me measured
    in a half-gig or more...

    > This would cause panics though, not freezes.

    I can't tell remotely if all of my hangs are panics, as it's a
    remote box. Once, on the console of a hung box, I found

      panic: worklist_remove: not on list

    This box did not reboot of it's own accord, and has wedged again
    under a similar workload...

    > Kris
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    -- 
Brian Reichert				<reichert@numachi.com>
55 Crystal Ave. #286			Daytime number: (603) 434-6842
Derry NH 03038-1725 USA			BSD admin/developer at large	
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  • Next message: Don Lewis: "Re: I can not surf on Flash powered sites."

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