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Re: kernel panic when removing a running script directly
- From: Masami Hiramatsu <mhiramat at redhat dot com>
- To: Martin Hunt <hunt at redhat dot com>
- Cc: systemtap-ml <systemtap at sources dot redhat dot com>
- Date: Thu, 01 Nov 2007 15:51:04 -0400
- Subject: Re: kernel panic when removing a running script directly
- References: <4720E574.9080006@redhat.com> <1193944915.6255.1.camel@dragon>
Hi,
Martin Hunt wrote:
> On Thu, 2007-10-25 at 14:50 -0400, Masami Hiramatsu wrote:
>> Hello Martin,
>>
>> I've gotten kernel panic when removing a running script (which is detached
>> from staprun) directly using rmmod command.
>> I hit it on Fedora7(2.6.22.9-91.fc7)@i386 and Fedora8test3(2.6.23.1-30.fc8)@x86-64
>> with latest systemtap on CVS.
>>
>> Here is what I did:
>> $ stap -m iotime examples/iotime.stp
>> ^4 (send SIGQUIT)
>> $ /sbin/rmmod iotime
>>
>> This bug sometimes did not occur, so you might need to repeat it.
>> And I could not reproduce it on RHEL5.
>
> I wrote a script to repeat the above process hundreds of times per
> second and was able to reproduce on all systems I tried. I have checked
> in a fix. Please update from CVS and confirm it works for you.
I confirmed the bug was fixed in CVS.
Thank you!
>
> Thanks for reporting this.
>
> Martin
>
>
--
Masami Hiramatsu
Software Engineer
Hitachi Computer Products (America) Inc.
Software Solutions Division
e-mail: mhiramat@redhat.com, masami.hiramatsu.pt@hitachi.com