Re: [Xen-devel] Xen4.2 S3 regression?

[Konrad Rzeszutek Wilk <konrad@xxxxxxxxxx>]

On Mon, Sep 24, 2012 at 11:36:23PM +0200, Javier Marcet wrote:
> On Mon, Sep 24, 2012 at 4:04 PM, Konrad Rzeszutek Wilk
> <konrad.wilk@xxxxxxxxxx> wrote:
> 
> >> >> xen-acpi-processor driver was merged to upstream Linux kernel v3.4.
> >> >>
> >> >
> >> > I see - so the advanced methods are not being used then
> >
> > You mean with the v3.5 kernel? I would think they would be used..
> >
> >> > This same kernel does work with Xen-4.0.x though. Is there an assumption 
> >> > in
> >> > the code that ties Xen-4.2 to a newer kernel?
> >>
> >> I'm being bitten by this bug with a 3.5 kernel and Xen 4.2
> >
> > Huh? How so?
> 
> I've tried adding a wbinvd() call before the halts in
> xen/arch/x86/domain.c:default_idle and I could do full suspend and
> resume cycle once, but a reboot later I couldn't resume anymore. Here

Did you use the patch that Jan posted?
> is the trace I get:

That is a different issue. That is the kernel, while the outstanding
issue in regards to suspend/resume is in the hypervisor.
> 
> [  142.322778] ACPI: Preparing to enter system sleep state S3
> [  142.723286] PM: Saving platform NVS memory
> [  142.736453] Disabling non-boot CPUs ...
> [  142.851387] ------------[ cut here ]------------
> [  142.851397] WARNING: at
> /home/storage/src/ubuntu-precise/kernel/rcutree.c:1550
> rcu_do_batch.isra.41+0x5f/0x213()


which ought to be fixed, but lets concentrate on one thing at a time.
If you use the patch that Jan posted, does it work? And I presume
you also have the two out-of-tree patches to make resume work in the
dom0?

> [  142.851401] Hardware name: To Be Filled By O.E.M.
> [  142.851404] Modules linked in: blktap(O) ip6table_filter ip6_tables
> ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4
> xt_state nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle xt_tcpudp
> iptable_filter ip_tables x_tables [last unloaded: cx25840]
> [  142.851466] Pid: 32, comm: migration/7 Tainted: G           O
> 3.5.0-14-i7 #18~precise1
> [  142.851469] Call Trace:
> [  142.851473]  <IRQ>  [<ffffffff8106a9bd>] warn_slowpath_common+0x7e/0x96
> [  142.851488]  [<ffffffff8106a9ea>] warn_slowpath_null+0x15/0x17
> [  142.851496]  [<ffffffff810c6e87>] rcu_do_batch.isra.41+0x5f/0x213
> [  142.851504]  [<ffffffff810c687f>] ?
> check_for_new_grace_period.isra.35+0x38/0x44
> [  142.851512]  [<ffffffff810c7101>] __rcu_process_callbacks+0xc6/0xee
> [  142.851520]  [<ffffffff810c7149>] rcu_process_callbacks+0x20/0x3e
> [  142.851527]  [<ffffffff81070c27>] __do_softirq+0x87/0x113
> [  142.851536]  [<ffffffff812e7b22>] ? __xen_evtchn_do_upcall+0x1a0/0x1dd
> [  142.851546]  [<ffffffff8162f05c>] call_softirq+0x1c/0x30
> [  142.851557]  [<ffffffff810343a3>] do_softirq+0x41/0x7e
> [  142.851566]  [<ffffffff81070e66>] irq_exit+0x3f/0x9a
> [  142.851573]  [<ffffffff812e95c9>] xen_evtchn_do_upcall+0x2c/0x39
> [  142.851580]  [<ffffffff8162f0ae>] xen_do_hypervisor_callback+0x1e/0x30
> [  142.851588]  <EOI>  [<ffffffff8100122a>] ? hypercall_page+0x22a/0x1000
> [  142.851601]  [<ffffffff8100122a>] ? hypercall_page+0x22a/0x1000
> [  142.851609]  [<ffffffff8102eee9>] ? xen_force_evtchn_callback+0xd/0xf
> [  142.851618]  [<ffffffff8102f552>] ? check_events+0x12/0x20
> [  142.851627]  [<ffffffff8102f53f>] ? xen_restore_fl_direct_reloc+0x4/0x4
> [  142.851635]  [<ffffffff810b6ff4>] ? arch_local_irq_restore+0xb/0xd
> [  142.851644]  [<ffffffff810b73f4>] ? stop_machine_cpu_stop+0xc1/0xd3
> [  142.851652]  [<ffffffff810b7333>] ? queue_stop_cpus_work+0xb5/0xb5
> [  142.851660]  [<ffffffff810b7152>] ? cpu_stopper_thread+0xf7/0x187
> [  142.851667]  [<ffffffff8108a927>] ? finish_task_switch+0x82/0xc1
> [  142.851676]  [<ffffffff8162c50b>] ? __schedule+0x428/0x454
> [  142.851685]  [<ffffffff8162cff0>] ? _raw_spin_unlock_irqrestore+0x15/0x18
> [  142.851693]  [<ffffffff810b705b>] ? cpu_stop_signal_done+0x30/0x30
> [  142.851701]  [<ffffffff81082627>] ? kthread+0x86/0x8e
> [  142.851710]  [<ffffffff8162ef64>] ? kernel_thread_helper+0x4/0x10
> [  142.851718]  [<ffffffff8162d338>] ? retint_restore_args+0x5/0x6
> [  142.851726]  [<ffffffff8162ef60>] ? gs_change+0x13/0x13
> [  142.851736] ---[ end trace 3722a99bcc5ae37a ]---
> [  144.257229] ACPI: Low-level resume complete
> [  144.257322] PM: Restoring platform NVS memory
> 
> 
> -- 
> Javier Marcet <jmarcet@xxxxxxxxx>
> 
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> 

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