| Date | Mon, 8 Jun 2009 09:15:44 -0700 | From | Stephen Hemminger <> | Subject | Re: [Bug #13116] Can't boot with nosmp |
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On Sun, 7 Jun 2009 11:52:49 +0200 (CEST) "Rafael J. Wysocki" <rjw@sisk.pl> wrote:
> This message has been generated automatically as a part of a report > of recent regressions. > > The following bug entry is on the current list of known regressions > from 2.6.29. Please verify if it still should be listed and let me know > (either way). > > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=13116 > Subject : Can't boot with nosmp > Submitter : Stephen Hemminger <shemminger@vyatta.com> > Date : 2009-04-15 4:18 (54 days old) > References : http://marc.info/?l=linux-kernel&m=123976917817920&w=4 > Handled-By : Dan Williams <dan.j.williams@intel.com> > >
I suspect this bit of code in dmaengine is the culprit:
/* redistribute available channels */ n = 0; for_each_dma_cap_mask(cap, dma_cap_mask_all) for_each_online_cpu(cpu) { if (num_possible_cpus() > 1) chan = nth_chan(cap, n++); else chan = nth_chan(cap, -1);
Why does num_possible_cpus() == 1 have to be a special case? --
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