> Quoting Ingo Molnar <[EMAIL PROTECTED]>:
> Subject: Re: lockdep question (was Re: IPoIB caused a kernel: BUG: softlockup
> detected on CPU#0!)
>
>
> * Michael S. Tsirkin <[EMAIL PROTECTED]> wrote:
>
> > > could you turn on CONFIG_SLAB_DEBUG as well?
> > >
> > > that should catch certain
* Michael S. Tsirkin <[EMAIL PROTECTED]> wrote:
> > could you turn on CONFIG_SLAB_DEBUG as well?
> >
> > that should catch certain types of use-after-free accesses, and
> > lockdep will also warn if a still locked object is freed.
>
> Hmm, no, this does not look like use-after-free. I enabled
> Quoting Ingo Molnar <[EMAIL PROTECTED]>:
> Subject: Re: lockdep question (was Re: IPoIB caused a kernel: BUG: softlockup
> detected on CPU#0!)
>
>
> * Michael S. Tsirkin <[EMAIL PROTECTED]> wrote:
>
> > > So either there are other sites that instanciate those objects and
> > > forget about
Quoting Ingo Molnar [EMAIL PROTECTED]:
Subject: Re: lockdep question (was Re: IPoIB caused a kernel: BUG: softlockup
detected on CPU#0!)
* Michael S. Tsirkin [EMAIL PROTECTED] wrote:
So either there are other sites that instanciate those objects and
forget about the lock init, or
* Michael S. Tsirkin [EMAIL PROTECTED] wrote:
could you turn on CONFIG_SLAB_DEBUG as well?
that should catch certain types of use-after-free accesses, and
lockdep will also warn if a still locked object is freed.
Hmm, no, this does not look like use-after-free. I enabled
Quoting Ingo Molnar [EMAIL PROTECTED]:
Subject: Re: lockdep question (was Re: IPoIB caused a kernel: BUG: softlockup
detected on CPU#0!)
* Michael S. Tsirkin [EMAIL PROTECTED] wrote:
could you turn on CONFIG_SLAB_DEBUG as well?
that should catch certain types of use-after-free
* Michael S. Tsirkin <[EMAIL PROTECTED]> wrote:
> > So either there are other sites that instanciate those objects and
> > forget about the lock init, or the object is corrupted (use after free?)
>
> OK, thanks for the hint. So I added this:
> And sure enough it triggers:
>
> [ 858.503010]
Quoting Peter Zijlstra <[EMAIL PROTECTED]>:
Subject: Re: lockdep question (was Re: IPoIB caused a kernel: BUG: softlockup
detected on CPU#0!)
> On Sun, 2007-03-11 at 15:50 +0200, Michael S. Tsirkin wrote:
> > > Quoting Roland Dreier <[EMAIL PROTECTED]>:
> > > Subject: Re: IPoIB caused a kernel:
Quoting Peter Zijlstra [EMAIL PROTECTED]:
Subject: Re: lockdep question (was Re: IPoIB caused a kernel: BUG: softlockup
detected on CPU#0!)
On Sun, 2007-03-11 at 15:50 +0200, Michael S. Tsirkin wrote:
Quoting Roland Dreier [EMAIL PROTECTED]:
Subject: Re: IPoIB caused a kernel: BUG: soft
* Michael S. Tsirkin [EMAIL PROTECTED] wrote:
So either there are other sites that instanciate those objects and
forget about the lock init, or the object is corrupted (use after free?)
OK, thanks for the hint. So I added this:
And sure enough it triggers:
[ 858.503010]
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