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Date: Tue, 15 Apr 2008 14:24:35 -0700 From: "Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com> To: "Soeren Sonnenburg" <kernel@....de> 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 >-----Original Message----- >From: Soeren Sonnenburg [mailto:kernel@....de] >Sent: Tuesday, April 15, 2008 2:18 PM >To: Pallipadi, Venkatesh >Cc: Rafael J. Wysocki; Adrian Bunk; Carlos R. Mafra; Linux >Kernel Mailing List >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 > Sorry. When I said Core 2, I was referring to Carlos and his updates on #10117. Thanks, Venki -- 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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