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Message-Id: <1208294294.7851.109.camel@localhost> Date: Tue, 15 Apr 2008 21:18:14 +0000 From: Soeren Sonnenburg <kernel@....de> To: "Pallipadi\, Venkatesh" <venkatesh.pallipadi@...el.com> Cc: "Rafael J\. Wysocki" <rjw@...k.pl>, Adrian Bunk <bunk@...nel.org>, "Carlos R\. Mafra" <crmafra2@...il.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: RE: [Bug #10117] 2.6.25-current-git sometimes hangs on boot - dual-core Sony Vaio On Tue, 2008-04-15 at 14:09 -0700, Pallipadi, Venkatesh wrote: > > >-----Original Message----- > >From: Rafael J. Wysocki [mailto:rjw@...k.pl] > >Sent: Tuesday, April 15, 2008 2:04 PM > >To: Adrian Bunk > >Cc: Carlos R. Mafra; Linux Kernel Mailing List; Soeren > >Sonnenburg; Pallipadi, Venkatesh > >Subject: Re: [Bug #10117] 2.6.25-current-git sometimes hangs > >on boot - dual-core Sony Vaio > > > >On Tuesday, 15 of April 2008, Adrian Bunk wrote: > >> On Tue, Apr 15, 2008 at 10:33:38PM +0200, Rafael J. Wysocki wrote: > >> > On Tuesday, 15 of April 2008, Carlos R. Mafra wrote: > >> > > On Sun 13.Apr'08 at 17:25:45 -0300, Carlos R. Mafra wrote: > >> > > > On Sun 13.Apr'08 at 20:56:41 +0200, Rafael J. Wysocki 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 2.6.24. Please verify if it still should be listed. > >> > > > > > >> > > > > > >> > > > > Bug-Entry : > >http://bugzilla.kernel.org/show_bug.cgi?id=10117 > >> > > > > Subject : 2.6.25-current-git sometimes > >hangs on boot - dual-core Sony Vaio > >> > > > > Submitter : Soeren Sonnenburg <kernel@....de> > >> > > > > Date : 2008-02-23 18:55 (51 days old) > >> > > > > References : http://lkml.org/lkml/2008/2/23/263 > >> > > > > http://lkml.org/lkml/2008/4/4/41 > >> > > > > http://lkml.org/lkml/2008/4/9/69 > >> > > > > >> > > > Soeren said it no longer happens to him in > >http://lkml.org/lkml/2008/4/9/53 > >> > > > but unfortunately it still happens with me using -rc9. > >So I kidnapped his > >> > > > bugzilla report :-) > >> > > > > >> > > > In the bugzilla entry I said earlier today that > >"hpet=disable" apparently > >> > > > makes the problem go away (42 boots OK so far, whereas > >without this > >> > > > boot option it hangs ~90% using vga=6 and ~10% using > >vga=0x0364) > >> > > > > >> > > > I tried to bisect it, but sometimes in pre 2.6.25-rc1 > >kernels it takes > >> > > > 30 boots before the first hang to occur. So bisection > >is not reliable... > >> > > > > >> > > > If someone proposes a patch I will be glad to test it! > >> > > > > >> > > > PS: The similar bug in buzilla 10377 also appears to be "fixed" > >> > > > by using hpet=disable, see comment #17 in that bug. > >> > > > >> > > > >> > > From what Mark Lord said in his comments #33 to #35 in > >> > > http://bugzilla.kernel.org/show_bug.cgi?id=10117 > >> > > it appears that this is a much older regression, from april 2007. > >> > > > >> > > So this is a regression, but not from 2.6.24 (although somehow > >> > > it never hit me before). I don't know about the policy of closing > >> > > regressions that come from way before the previous > >kernel version, > >> > > if there is any. Then I will let you manage the bugzilla #10117 > >> > > as you see fit (but I will be "there" to hopefuly test any > >> > > proposed patches). > >> > > >> > I dropped the bug from the list of recent regressions, so > >it doesn't block > >> > bug #9832 any more. However, this still is a bug and > >regression, so the > >> > bugzilla entry remains open. > >> > >> Soerens original report was a 2.6.25 regression. > >> > >> And #10377 that was closed as a duplicate of #10117 was also > >reported as > >> a 2.6.25 regression. > >> > >> #10117 seems to suffer from the common disease of people > >hijacking an > >> existing bug, but Soeren's issue that was what was > >originally tracked in > >> #10117 is (or was) a 2.6.25 regression. > > > >Well, I'm really not 100% sure it was a regression from 2.6.24 > >and I'm not > >sure bug #10377 should have been marked as a duplicate. > > > >I made bug #10117 block bug #9832 again, but it would be nice > >to sort this out. > > > >Why do we think that the cause of bugs #10117 and #10377 is the same? > > > >Rafael > > > > Both of them probabilistically hang early in the boot. > On both !CPUIDLE and hpet=disable seems to be working around the > problem. > Both are Core 2 Duo based with 64 bit kernel. > > One difference I saw was that #10377 fails on battery. That may be > because when on battery CPUs may be running at lower freq during boot > and that is probably helping this problem in terms of timing. FWIW, this macbook pro1,1 has only a core 1 duo, so x86 == 32bit... Soeren -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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