Re: kldunload DIAGNOSTIC idea...

From: Brian Fundakowski Feldman (green_at_freebsd.org)
Date: 07/20/04

  • Next message: Poul-Henning Kamp: "Re: kldunload DIAGNOSTIC idea..." 
    Date: Tue, 20 Jul 2004 14:32:13 -0400
To: Poul-Henning Kamp <phk@phk.freebsd.dk>

    On Tue, Jul 20, 2004 at 08:20:23PM +0200, Poul-Henning Kamp wrote:
    >
    > I'm pulling hair out trying to make it guaranteed safe to unload device
    > driver modules, and the major pain here is to make sure there is no
    > thread stuck somewhere inside the code.
    >
    > That gave me the idea for a simple little DIAGNOSTIC check for kldunload:
    > run through the proc/thread table and look for any thread with an
    > instruction counter inside the range of pages we are going to unload.
    >
    > Any takers ?

    You mean any thread with a stack trace that includes an instruction
    counter inside those pages, don't you? 

    -- 
Brian Fundakowski Feldman                           \'[ FreeBSD ]''''''''''\
  <> green@FreeBSD.org                               \  The Power to Serve! \
 Opinions expressed are my own.                       \,,,,,,,,,,,,,,,,,,,,,,\
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  • Next message: Poul-Henning Kamp: "Re: kldunload DIAGNOSTIC idea..."

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    • Re: kldunload DIAGNOSTIC idea...
      ... >>I'm pulling hair out trying to make it guaranteed safe to unload device ... >>driver modules, and the major pain here is to make sure there is no ... >>instruction counter inside the range of pages we are going to unload. ... This is better than phk's suggestion since you can have module code ...
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    • kldunload DIAGNOSTIC idea...
      ... I'm pulling hair out trying to make it guaranteed safe to unload device ... driver modules, and the major pain here is to make sure there is no ... thread stuck somewhere inside the code. ...
      (freebsd-arch)
    • Re: kldunload DIAGNOSTIC idea...
      ... >> I'm pulling hair out trying to make it guaranteed safe to unload device ... >> driver modules, and the major pain here is to make sure there is no ... >> instruction counter inside the range of pages we are going to unload. ... >You mean any thread with a stack trace that includes an instruction ...
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