Xen devel - Jan 2005 - xen-unstable dom0/1 smp schedule while atomic

While running xen-unstable (2005-01-13 nightly) with dom0 and dom1 with
CONFIG_SMP=y I got 271k of output...  sshd was running in dom0 and I remotely
initiated an scp from dom0 to another remote host (not dom1) Ill only post the
first and last few "scheduling while atomic" entries, let me know if
someone
wants the whole
trace.  

 scheduling while atomic
  [schedule+1682/1696] schedule+0x692/0x6a0
  [sys_read+126/128] sys_read+0x7e/0x80
  [work_resched+5/47] work_resched+0x5/0x2f
 scheduling while atomic
  [schedule+1682/1696] schedule+0x692/0x6a0
  [sys_read+126/128] sys_read+0x7e/0x80
  [work_resched+5/47] work_resched+0x5/0x2f
 scheduling while atomic
  [schedule+1682/1696] schedule+0x692/0x6a0
  [do_softirq+155/160] do_softirq+0x9b/0xa0
  [irq_exit+57/64] irq_exit+0x39/0x40
  [do_IRQ+34/48] do_IRQ+0x22/0x30
  [evtchn_do_upcall+190/320] evtchn_do_upcall+0xbe/0x140
  [work_resched+5/47] work_resched+0x5/0x2f
 scheduling while atomic
  [schedule+1682/1696] schedule+0x692/0x6a0
  [do_softirq+155/160] do_softirq+0x9b/0xa0
  [irq_exit+57/64] irq_exit+0x39/0x40
  [do_IRQ+34/48] do_IRQ+0x22/0x30
  [evtchn_do_upcall+190/320] evtchn_do_upcall+0xbe/0x140
  [work_resched+5/47] work_resched+0x5/0x2f

<snip>

 scheduling while atomic
  [schedule+1682/1696] schedule+0x692/0x6a0
  [__change_page_attr+203/624] __change_page_attr+0xcb/0x270
  [sys_sched_yield+89/112] sys_sched_yield+0x59/0x70
  [coredump_wait+63/176] coredump_wait+0x3f/0xb0
  [do_coredump+222/471] do_coredump+0xde/0x1d7
  [__dequeue_signal+296/432] __dequeue_signal+0x128/0x1b0
  [__dequeue_signal+245/432] __dequeue_signal+0xf5/0x1b0
  [dequeue_signal+53/160] dequeue_signal+0x35/0xa0
  [get_signal_to_deliver+599/848] get_signal_to_deliver+0x257/0x350
  [do_signal+103/288] do_signal+0x67/0x120
  [dnotify_parent+58/176] dnotify_parent+0x3a/0xb0
  [vfs_read+210/304] vfs_read+0xd2/0x130
  [fget_light+130/144] fget_light+0x82/0x90
  [sys_read+126/128] sys_read+0x7e/0x80
  [do_notify_resume+55/60] do_notify_resume+0x37/0x3c
  [work_notifysig+19/24] work_notifysig+0x13/0x18
 scheduling while atomic
  [schedule+1682/1696] schedule+0x692/0x6a0
  [wake_up_state+24/32] wake_up_state+0x18/0x20
  [wait_for_completion+148/224] wait_for_completion+0x94/0xe0
  [default_wake_function+0/32] default_wake_function+0x0/0x20
  [force_sig_specific+99/144] force_sig_specific+0x63/0x90
  [default_wake_function+0/32] default_wake_function+0x0/0x20
  [zap_threads+92/160] zap_threads+0x5c/0xa0
  [coredump_wait+169/176] coredump_wait+0xa9/0xb0
  [do_coredump+222/471] do_coredump+0xde/0x1d7
  [__dequeue_signal+296/432] __dequeue_signal+0x128/0x1b0
  [__dequeue_signal+245/432] __dequeue_signal+0xf5/0x1b0
  [dequeue_signal+53/160] dequeue_signal+0x35/0xa0
  [get_signal_to_deliver+599/848] get_signal_to_deliver+0x257/0x350
  [do_signal+103/288] do_signal+0x67/0x120
  [dnotify_parent+58/176] dnotify_parent+0x3a/0xb0
  [vfs_read+210/304] vfs_read+0xd2/0x130
  [fget_light+130/144] fget_light+0x82/0x90
  [sys_read+126/128] sys_read+0x7e/0x80
  [do_notify_resume+55/60] do_notify_resume+0x37/0x3c
  [work_notifysig+19/24] work_notifysig+0x13/0x18
note: sshd[20450] exited with preempt_count 1

Ryan Harper


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On Fri, Jan 14, 2005 at 11:01:37AM -0600, Ryan Harper
wrote:
> While running xen-unstable (2005-01-13 nightly) with dom0 and dom1 with
> CONFIG_SMP=y I got 271k of output...  sshd was running in dom0 and I
remotely
> initiated an scp from dom0 to another remote host (not dom1) Ill only post
the
> first and last few "scheduling while atomic" entries, let me know
if someone
> wants the whole trace.  
It looks like I forgot to push my final change to the fixup code out to
the unstable tree.  It''s pushed now.

    christian



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