Re: bugs in __schedule()

[gshan]

Satyam Sharma wrote:
> Hi Gavin,
>
> On 6/26/07, gshan <gshan@xxxxxxxxxxxxxxxxxx> wrote:
> > Here is the all output I have:
> >
> > # ifconfig mgt0 10.0.51.27
> > BUG: scheduling while atomic: exe/0x00000101/752
>
> Yup, you can't sleep in taskets, they're atomic.
>
> > caller is schedule+0x4c/0xe4
> > Call trace:
> >  [c02dc4dc] __schedule+0x654/0x788
> >  [c02dc6f4] schedule+0x4c/0xe4
> >  [c02dbe24] __compat_down+0xc8/0x12c
>
> So, you can't use / acquire semaphores in them. Use spinlocks.
> If the shared data is also accessed from process context, use
> spin_lock_bh() from the process context code.
>
> Satyam
Thanks, Satyam. So I can replace the tasklet with kernel thread?
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/