Re: [Bug 7505] Linux-2.6.19 fails to boot on AMD64 machine

bugme-daemon@xxxxxxxxxxxxxxxxxxx writes:

http://bugzilla.kernel.org/show_bug.cgi?id=7505

one. I think this was a better bisection and I got this

Bisecting: 1 revisions left to test after this
[d71374dafbba7ec3f67371d3b7e9f6310a588808] PCI: fix race with pci_walk_bus and
pci_destroy_dev
d71374dafbba7ec3f67371d3b7e9f6310a588808 is first bad commit
commit d71374dafbba7ec3f67371d3b7e9f6310a588808
Author: Zhang Yanmin <yanmin.zhang@xxxxxxxxx>
Date: Fri Jun 2 12:35:43 2006 +0800

[PATCH] PCI: fix race with pci_walk_bus and pci_destroy_dev

pci_walk_bus has a race with pci_destroy_dev. When cb is called
in pci_walk_bus, pci_destroy_dev might unlink the dev pointed by next.
Later on in the next loop, pointer next becomes NULL and cause
kernel panic.

Below patch against 2.6.17-rc4 fixes it by changing pci_bus_lock (spin_lock)
to pci_bus_sem (rw_semaphore).

Signed-off-by: Zhang Yanmin <yanmin.zhang@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

:040000 040000 570ec0423dac5f57a4b7db859e4f502fab422b4d
3fbe35bcc512418894e9ae3862f44363b8b0ab4e M drivers


Let's try and discussing this someplace where people are watching. Bugzilla
seems to be a horrible medium for tracking down bugs.

Does reverting the above commit allow later kernels to boot? Or do you
still get the impossible oops?

Eric
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