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    SubjectRe: [Bug #10117] 2.6.25-current-git sometimes hangs on boot - dual-core Sony Vaio
    Date
    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@sisk.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@nn7.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


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