lkml.org 
[lkml]   [2008]   [May]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: 2.6.26-rc4: RIP __call_for_each_cic+0x20/0x50
    On Tue, May 27 2008, Alexey Dobriyan wrote:
    > On Sat, May 10, 2008 at 02:37:19PM +0400, Alexey Dobriyan wrote:
    > > > > > > @@ -41,8 +41,8 @@ int put_io_context(struct io_context *ioc)
    > > > > > > rcu_read_lock();
    > > > > > > if (ioc->aic && ioc->aic->dtor)
    > > > > > > ioc->aic->dtor(ioc->aic);
    > > > > > > - rcu_read_unlock();
    > > > > > > cfq_dtor(ioc);
    > > > > > > + rcu_read_unlock();
    > > > > > >
    > > > > > > kmem_cache_free(iocontext_cachep, ioc);
    > > > > > > return 1;
    > > > > >
    > > > > > This helps in sense that 3 times bulk cross-compiles finish to the end.
    > > > > > You'll hear me if another such oops will resurface.
    > > > >
    > > > > Still looking good?
    > > >
    > > > Yup!
    > >
    > > And this with patch in mainline, again with PREEMPT_RCU.
    >
    > Ping, this happened again with 2.6.26-rc4 and PREEMPT_RCU.

    Worrisome... Paul, would you mind taking a quick look at cfq
    and see if you can detect why breaks with preempt rcu? It's
    clearly a use-after-free symptom, but I don't see how it can
    happen.

    --
    Jens Axboe



    \
     
     \ /
      Last update: 2008-05-27 15:37    [W:0.044 / U:0.096 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site