Re: [DEBUG INFO]IPv6: sleeping function called from invalid context.

From: Thomas Graf
Date: Sat Nov 19 2005 - 16:03:27 EST

* Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> 2005-11-19 22:48
> Thomas Graf <tgraf@xxxxxxx> wrote:
> >
> > I did. I think it was right, why would an allocation be necessary on
> > the second call to inet6_dump_fib()? The walker allocated in process
> > context on the first call should be reused from cb->args[0].
> Continued dumps are always called under spin lock (see netlink_dump).
> So we need to use GFP_ATOMIC in dumpers.

The continued dumps wouldn't be the problem, the walker is allocated
on the initial dump call. It was a mistake though, nlk->cb_lock spin
lock is always held for cb->dump() even though it should only be
required during the nlk->cb != NULL check. netlink_dump_start()
guarantees to only allow one dumper per socket at a time.
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