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@xxxxxx>
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
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