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xen-devel
Re: [Xen-devel] Re: [PATCH] xen: register timer interrupt with IRQF_TIME
Hi,
Ok, sorry didn not notice that. my domU kernels are quite small, they
dont contain anything that is not necessary and since power management
options were not necessary on Xen 3.4 I did not enable them on unstable
either. Gonna now compile new domU kernels and test again.
Thanks.
- Valtteri Kiviniemi
Ian Campbell kirjoitti:
On Tue, 2009-11-24 at 12:51 +0000, Valtteri Kiviniemi wrote:
Hi,
This is not still working, when I try to save a domain:
file:
root@xen:/# du -h db.save
64K db.save
domU console.
Ignoring shutdown request: suspend
As I said before - enable CONFIG_PM_SLEEP, you won't get anywhere
without it.
Ian.
xend.log:
[2009-11-24 14:47:57 2131] DEBUG (XendCheckpoint:124) [xc_save]:
/usr/lib/xen/bin/xc_save 54 1 0 0 0
[2009-11-24 14:47:57 2131] INFO (XendCheckpoint:424) xc_save: failed to
get the suspend evtchn port
domU config:
kernel = "/boot/bzImage-domU"
builder = "linux"
memory = "1024"
name = "db"
vcpus = "8"
cpus = [ "0", "1", "2", "3", "4", "5", "6", "7" ]
tsc_native="1"
vif = [ "mac=00:50:56:13:27:d9, bridge=eth0" ]
disk = [ "phy:/dev/virtuals/db,xvda1,w" ]
root = "/dev/xvda1 ro"
extra = "console=hvc0"
on_poweroff = "destroy"
on_reboot = "restart"
on_crash = "restart"
Latest xen-unstable (compiled 1 hour ago) latest 2.6.31.6 kernel with
this patch applied.
- Valtteri Kiviniemi
Ian Campbell kirjoitti:
On Tue, 2009-11-24 at 10:16 +0000, Ian Campbell wrote:
Otherwise the timer is disabled by dpm_suspend_noirq() which in turn prevents
correct operation of stop_machine on multi-processor systems and breaks
suspend.
This appears to have been broken since after 2.6.29 sometime (I see
failures with 2.6.30). I suspect this commit, or one related to it, made
IRQF_TIMER a hard requirement:
commit 0a0c5168df270a50e3518e4f12bddb31f8f5f38f
Author: Rafael J. Wysocki <rjw@xxxxxxx>
Date: Mon Mar 16 22:33:49 2009 +0100
PM: Introduce functions for suspending and resuming device interrupts
Introduce helper functions allowing us to prevent device drivers from
getting any interrupts (without disabling interrupts on the CPU)
during suspend (or hibernation) and to make them start to receive
interrupts again during the subsequent resume. These functions
make it
possible to keep timer interrupts enabled while the "late" suspend
and
"early" resume callbacks provided by device drivers are being
executed. In turn, this allows device drivers' "late" suspend and
"early" resume callbacks to sleep, execute ACPI callbacks etc.
The functions introduced here will be used to rework the handling of
interrupts during suspend (hibernation) and resume. Namely,
interrupts will only be disabled on the CPU right before suspending
sysdevs, while device drivers will be prevented from receiving
interrupts, with the help of the new helper function, before their
"late" suspend callbacks run (and analogously during resume).
Ian.
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http://lists.xensource.com/xen-devel
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