Messages in this thread | | | Date | Sat, 15 Sep 2007 04:08:02 -0700 | From | Andrew Morton <> | Subject | Re: Why do so many machines need "noapic"? |
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On Sat, 15 Sep 2007 12:58:27 +0200 Ingo Oeser <ioe-lkml@rameria.de> wrote:
> On Saturday 15 September 2007, Andrew Morton wrote: > > There are 48 bugs in bugzilla which mention "noapic" > > > > http://bugzilla.kernel.org/buglist.cgi?query_format=advanced&short_desc_type=allwordssubstr&short_desc=&long_desc_type=substring&long_desc=noapic&kernel_version_type=allwordssubstr&kernel_version=&bug_status=NEW&bug_status=REOPENED&bug_status=ASSIGNED&emailassigned_to1=1&emailtype1=substring&email1=&emailassigned_to2=1&emailreporter2=1&emailcc2=1&emailtype2=substring&email2=&bugidtype=include&bug_id=&chfieldfrom=&chfieldto=Now&chfieldvalue=®ression=both&cmdtype=doit&order=Reuse+same+sort+as+last+time&field0-0-0=noop&type0-0-0=noop&value0-0-0= > > > > And there are 173,000 on the internet ;) > > http://www.google.com/search?hl=en&q=linux+noapic&btnG=Google+Search > > > > We screwed this pooch a long time ago - years. Perhaps if some of the many > > noapic users could run a bisection search to work out when it broke we > > could start fixing things. But they all have a workaround so there's no > > motivation. > > I have 2 SMP-Boards and both need noapic. One is from 2001 (AUSUS CUR-DLS), > one is from June 2006 (Gigabyte M57SLI-S4). > > There are many reasons: > > 1. Bugs which have such a simple workaround don't get much attention. > > 2. Usually SMP boards are used for machines, which just HAVE to work, > since they have been expensive. These are not consumer boards. > > 3. I usually had only USB problems (no IRQ), if ommiting noapic. > USB technology is a cosumer grade technology and enterprise > grade developers don't have much interest in it (until now?). > > 4. IRQ routing setup is often a BIOS issue. You might be able > to fix that by upgrading your BIOS. That often needs a Windows > tool. Linux people not always (want to) have access to Windows :-) > > I reported the all the problems (starting 2001), no developer > seemed interested. > > I can report them against the latest RC6 kernel tomorrow and put them > into bugzilla, if we now REALLY care. >
I believe that about two years ago we broke something which caused quite a large number of people to need noapic. Is that the case with any of your machines? Do you know if they run 2.6.ancient without noapic?
Thanks.
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