[Development] Running Qt 5.2.1 without udev

[Thiago Macieira]

Em seg 09 jun 2014, às 18:28:20, Thiago Macieira escreveu:
> Em seg 09 jun 2014, às 12:06:10, Jacob Kroon escreveu:
> > Hi,
> > 
> > I'm testing Qt 5.2.1 on a Wandboard using Yocto. If I build Qt5 without
> > udev support,
> > 
> > I get 3 or 4 of these kernel warnings when I start my application:
> >     idr_remove called for id=xxx which is not allocated.
> >     CPU: 0 PID: 538 Comm: xxx Not tainted xxx
> >     [<80013c7c>] (unwind_backtrace+0x0/0xec) from [<80011634>]
> > 
> > (show_stack+0x10/0x14)
> > 
> >     [<80011634>] (show_stack+0x10/0x14) from [<80279198>]
> > 
> > (idr_remove.part.9+0x290/0x29c)
> > 
> >     [<80279198>] (idr_remove.part.9+0x290/0x29c) from [<802fdaec>]
> > 
> > (drm_ctxbitmap_free+0x24/0x30)
> > 
> >     [<802fdaec>] (drm_ctxbitmap_free+0x24/0x30) from [<802fe01c>]
> > 
> > (drm_rmctx+0x64/0x110)
> > 
> >     [<802fe01c>] (drm_rmctx+0x64/0x110) from [<802fe714>]
> > 
> > (drm_ioctl+0x3d4/0x50c)
> > 
> >     [<802fe714>] (drm_ioctl+0x3d4/0x50c) from [<800d8f70>]
> > 
> > (do_vfs_ioctl+0x3f4/0x5b4)
> > 
> >     [<800d8f70>] (do_vfs_ioctl+0x3f4/0x5b4) from [<800d9168>]
> > 
> > (SyS_ioctl+0x38/0x60)
> > 
> >     [<800d9168>] (SyS_ioctl+0x38/0x60) from [<8000e180>]
> > 
> > (ret_fast_syscall+0x0/0x30)
> > 
> > Could anyone shed some light on the matter ?
> 
> Looks like a kernel bug. Maybe you should talk to the libdrm guys. It would
> be a good idea to run the application with strace so you can get the actual
> ioctls done.

On second thought, this message might be a warning from the kernel devs like 
we do with qWarning: they're telling us that there's a bug in our code.

Anyway, I can't decipher the message. Maybe someone who knows the drm plugin 
might be able to help.
-- 
Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel Open Source Technology Center