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SubjectRe: next-20130117 - kernel BUG with aio
On Tue, 22 Jan 2013 16:28:18 -0500
Valdis.Kletnieks@vt.edu wrote:

> On Tue, 22 Jan 2013 21:43:27 +0800, Hillf Danton said:
> > On Mon, Jan 21, 2013 at 9:24 PM, Valdis Kletnieks
> > <Valdis.Kletnieks@vt.edu> wrote:
> > > Am seeing a reproducible BUG in the kernel with next-20130117
> > > whenever I fire up VirtualBox. Unfortunately, I hadn't done that
> > > in a while, so the last 'known good' kernel was next-20121203.
> > >
> > > I'm strongly suspecting one of Kent Overstreet's 32 patches against aio,
> > > because 'git blame' shows those landing on Jan 12, and not much else
> > > happening to fs/aio.c in ages.
> > >
> > Take a try?
> > ---
> > --- a/fs/aio.c Tue Jan 22 21:37:54 2013
> > +++ b/fs/aio.c Tue Jan 22 21:43:58 2013
> > @@ -683,6 +683,9 @@ static inline void kioctx_ring_unlock(st
> > {
> > struct aio_ring *ring;
> >
> > + if (!ctx)
> > + return;
> > +
> > smp_wmb();
> > /* make event visible before updating tail */
>
> Well, things are improved - at least now it doesn't BUG :)
>
> [ 534.879083] ------------[ cut here ]------------
> [ 534.879094] WARNING: at fs/aio.c:336 put_ioctx+0x1cb/0x252()
> [ 534.879121] Call Trace:
> [ 534.879129] [<ffffffff8102f5ad>] warn_slowpath_common+0x7e/0x97
> [ 534.879133] [<ffffffff8102f5db>] warn_slowpath_null+0x15/0x17
> [ 534.879137] [<ffffffff811521f0>] put_ioctx+0x1cb/0x252
> [ 534.879142] [<ffffffff8105bee3>] ? __wake_up+0x3f/0x48
> [ 534.879146] [<ffffffff8115229e>] ? kill_ioctx_work+0x27/0x2b
> [ 534.879150] [<ffffffff811531a5>] sys_io_destroy+0x40/0x50
> [ 534.879156] [<ffffffff8161b112>] system_call_fastpath+0x16/0x1b
> [ 534.879159] ---[ end trace a2c46a8bc9058404 ]---
>
> Hopefully that tells you and Kent something. :)

Did this get fixed?


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