Hi Andrew,
While booting up and shutting down, x86 machine with 2.6.26-rc8-mm1 kernel,
kernel bug call trace is shows up in the logs
iscsid (pid 2163 2162) is running...
Setting up iSCSI targets: [ 34.577226] BUG: sleeping function called from invalid context at include/linux/pagemap.h:291
[ 34.602939] in_atomic():1, irqs_disabled():0
[ 34.615866] 1 lock held by iscsid/2163:
[ 34.627120] #0: (&mm->mmap_sem){----}, at: [<c046f393>] sys_munmap+0x23/0x3f
[ 34.649978] Pid: 2163, comm: iscsid Not tainted 2.6.26-rc8-mm1-autotest #1
[ 34.670212] [<c041fdbb>] __might_sleep+0xb5/0xba
[ 34.684660] [<c046cbe9>] __munlock_pte_handler+0x44/0xf8
[ 34.701053] [<c0472007>] walk_page_range+0x15b/0x1b4
[ 34.716574] [<c046cb87>] __munlock_vma_pages_range+0x91/0x9e
[ 34.734022] [<c046ca08>] ? __munlock_pmd_handler+0x0/0x10
[ 34.750860] [<c046cba5>] ? __munlock_pte_handler+0x0/0xf8
[ 34.767654] [<c046cba3>] munlock_vma_pages_range+0xf/0x11
[ 34.784328] [<c046e42d>] do_munmap+0xe4/0x1d9
[ 34.797857] [<c046f3a0>] sys_munmap+0x30/0x3f
[ 34.811451] [<c04038c9>] sysenter_past_esp+0x6a/0xa5
[ 34.826806] =======================
[ OK ]
[ OK ]
While shutting down
Stopping Bluetooth services:[ OK ]
Starting killall: [ OK ]
Sending all processes the TERM signal...
Sending all processes the KILL signal... [ 76.982147] BUG: sleeping function called from invalid context at include/linux/pagemap.h:291
[ 77.007777] in_atomic():1, irqs_disabled():0
[ 77.020679] no locks held by iscsid/2163.
[ 77.033260] Pid: 2163, comm: iscsid Not tainted 2.6.26-rc8-mm1-autotest #1
[ 77.053985] [<c041fdbb>] __might_sleep+0xb5/0xba
[ 77.074205] [<c046cbe9>] __munlock_pte_handler+0x44/0xf8
[ 77.098841] [<c0472007>] walk_page_range+0x15b/0x1b4
[ 77.115703] [<c046cb87>] __munlock_vma_pages_range+0x91/0x9e
[ 77.133117] [<c046ca08>] ? __munlock_pmd_handler+0x0/0x10
[ 77.149880] [<c046cba5>] ? __munlock_pte_handler+0x0/0xf8
[ 77.166634] [<c046cba3>] munlock_vma_pages_range+0xf/0x11
[ 77.183268] [<c046db3d>] exit_mmap+0x32/0xf2
[ 77.196525] [<c0427cdc>] ? exit_mm+0xc7/0xd3
[ 77.209911] [<c0424782>] mmput+0x50/0xba
[ 77.222130] [<c0427ce3>] exit_mm+0xce/0xd3
[ 77.234872] [<c0428fe2>] do_exit+0x20b/0x617
[ 77.248128] [<c04410d6>] ? trace_hardirqs_on+0xb/0xd
[ 77.263601] [<c042944d>] do_group_exit+0x5f/0x88
[ 77.277994] [<c0430ebd>] get_signal_to_deliver+0x2eb/0x32a
[ 77.294997] [<c0402fe9>] do_notify_resume+0x93/0x74e
[ 77.310437] [<c0442042>] ? __lock_acquire+0xbb7/0xbfb
[ 77.327268] [<c04081ad>] ? native_sched_clock+0x84/0x96
[ 77.342650] [<c043f314>] ? trace_hardirqs_off+0xb/0xd
[ 77.358450] [<c04081ad>] ? native_sched_clock+0x84/0x96
[ 77.374827] [<c0403a1a>] work_notifysig+0x13/0x19
[ 77.389505] =======================
[ 77.632224] type=1111 audit(1215512324.000:11): user pid=3484 uid=0 auid=4294967295 ses=4294967295 msg='changing system time: exe="/sbin/hwclock" (hostname=?, addr=?, terminal=console res=success)'
Turning off swap:
Turning off quotas:
Unmounting pipe file systems:
Please stand by while rebooting the system...
[ 82.377079] md: stopping all md devices.
[ 83.930821] Restarting system.
[ 83.940099] machine restart
0xc046f393 is in sys_munmap (mm/mmap.c:1968).
1963 struct mm_struct *mm = current->mm;
1964
1965 profile_munmap(addr);
1966
1967 down_write(&mm->mmap_sem);
1968 ret = do_munmap(mm, addr, len);
1969 up_write(&mm->mmap_sem);
1970 return ret;
1971 }
1972
0xc046cbe9 is in __munlock_pte_handler (include/linux/pagemap.h:291).
286 /*
287 * lock_page may only be called if we have the page's inode pinned.
288 */
289 static inline void lock_page(struct page *page)
290 {
291 might_sleep();
292 if (TestSetPageLocked(page))
293 __lock_page(page);
294 }
295
--
Thanks & Regards,
Kamalesh Babulal,
Linux Technology Center,
IBM, ISTL.
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