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Date: Tue, 15 Apr 2008 23:24:17 +0200 From: "Rafael J. Wysocki" <rjw@...k.pl> To: Soeren Sonnenburg <kernel@....de> Cc: "Pallipadi\, Venkatesh" <venkatesh.pallipadi@...el.com>, 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 Tuesday, 15 of April 2008, Soeren Sonnenburg wrote: > 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... So I think we should leave bug #10117 to track the original issue (hangs on MacBook Pro1.1 w/ Intel Core Duo x86-32), reopen bug #10377 and use that to track the Core 2 Duo 64-bit issues. Any objections to that? Rafael -- 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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