x86.git allyesconfig bootup test produced the following warning in 
slub.c (and a stream of similar warnings later on):

[   47.295141] ------------[ cut here ]------------
[   47.298969] WARNING: at mm/slub.c:2443 kmem_cache_destroy+0xf8/0x102()
[   47.302967] Modules linked in:
[   47.307205] Pid: 1, comm: swapper Not tainted 2.6.25-sched-devel.git-x86-latest.git #24
[   47.310970]  [<c014be1a>] warn_on_slowpath+0x46/0x56
[   47.317464]  [<c019685f>] ? get_pageblock_flags_group+0x56/0x74
[   47.322969]  [<c04f2e03>] ? list_add+0xa/0xf
[   47.328814]  [<c123083a>] ? _spin_unlock+0x22/0x25
[   47.333327]  [<c0191ce8>] ? time_hardirqs_off+0xe/0x1f
[   47.338972]  [<c0167ff7>] ? trace_hardirqs_off_caller+0x15/0xab
[   47.342970]  [<c0168098>] ? trace_hardirqs_off+0xb/0xd
[   47.350971]  [<c01976f7>] ? free_hot_cold_page+0x11d/0x139
[   47.354970]  [<c0191f58>] ? time_hardirqs_on+0xe/0x1f
[   47.361595]  [<c0169779>] ? trace_hardirqs_on_caller+0x16/0x13c
[   47.366973]  [<c01698aa>] ? trace_hardirqs_on+0xb/0xd
[   47.370972]  [<c01b1a62>] kmem_cache_destroy+0xf8/0x102
[   47.377727]  [<c09dab7f>] scsi_put_host_cmd_pool+0x42/0x58
[   47.382973]  [<c09db1b4>] scsi_destroy_command_freelist+0x54/0x5c
[   47.386972]  [<c09db2ef>] scsi_host_dev_release+0x79/0xa9
[   47.394973]  [<c067ee95>] device_release+0x3e/0x54
[   47.398974]  [<c04e0e62>] kobject_release+0x45/0x55
[   47.405383]  [<c04e0e1d>] ? kobject_release+0x0/0x55
[   47.409513]  [<c04e1968>] kref_put+0x3e/0x49
[   47.414975]  [<c04e0d8d>] kobject_put+0x19/0x1b
[   47.418975]  [<c067f44e>] put_device+0x16/0x18
[   47.422975]  [<c09db274>] scsi_host_put+0x12/0x14
[   47.426975]  [<c09db3dc>] scsi_unregister+0x1d/0x20
[   47.433383]  [<c1ceddcc>] aha1542_detect+0x7db/0x7f5
[   47.438977]  [<c01698aa>] ? trace_hardirqs_on+0xb/0xd
[   47.442976]  [<c1ceddf1>] ? init_this_scsi_driver+0xb/0xd0
[   47.450666]  [<c1cede44>] init_this_scsi_driver+0x5e/0xd0
[   47.454978]  [<c1c944db>] kernel_init+0x152/0x2b0
[   47.458978]  [<c1c94389>] ? kernel_init+0x0/0x2b0
[   47.465249]  [<c1c94389>] ? kernel_init+0x0/0x2b0
[   47.469258]  [<c01199c3>] kernel_thread_helper+0x7/0x10
[   47.474978]  =======================
[   47.478980] ---[ end trace 778e504de7e3b1e3 ]---
[   47.483297] ------------[ cut here ]------------

config and bootlog at:

 http://redhat.com/~mingo/misc/config-Sat_Apr_19_10_28_28_CEST_2008.bad
 http://redhat.com/~mingo/misc/log-Sat_Apr_19_10_28_28_CEST_2008.bad

[a few .config options were turned off: just accept all the defaults 
 after 'make oldconfig']

	Ingo
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