Messages in this thread | | | Date | Mon, 7 Jun 1999 12:13:46 +0200 (CEST) | From | Ingo Molnar <> | Subject | Re: 2.2.9-ac2 locks solid |
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On Mon, 7 Jun 1999, Alan Cox wrote:
> > >>EIP: c0196b87 <stext_lock+f67/3e60> > > Trace: c0127e37 <try_to_free_pages+33/44> > > Trace: c0128683 <__get_free_pages+6b/1d0> > > Trace: c010b183 <handle_IRQ_event+5f/94> > > Trace: c0126818 <kmem_cache_grow+114/3b8> > > Trace: c0113c63 <do_edge_ioapic_IRQ+7f/b0> > > Trace: c0126c1a <kmem_cache_alloc+fa/170> > > Trace: c01156a0 <send_sig_info+1c0/2f8> > > Trace: c0115a8e <kill_something_info+10a/11c>
> Unfortunately I can't see how handle_IRQ_event ever directly called > __get_free_pages. So I don't think the IRQ part of the trace is valid.
it's just 'dirt on the stack' probably.
> The rest however is rather obvious 8) _iff_ you are using rt signals. > > kernel/signal.c: send_sig_info uses GFP_KERNEL from a bh. > > Change > > struct signal_queue *q = 0; > > if (nr_queued_signals < max_queued_signals) { > q = (struct signal_queue *) > kmem_cache_alloc(signal_queue_cachep, GFP_KERNEL); > } > > to use GFP_ATOMIC instead and let me know
this might as well explain the 'stuck on TLB IPI wait' bugs?
-- mingo
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