* kexec not working in xen domU?
@ 2020-12-09 19:09 Phillip Susi
2020-12-14 18:52 ` Guilherme G. Piccoli
0 siblings, 1 reply; 6+ messages in thread
From: Phillip Susi @ 2020-12-09 19:09 UTC (permalink / raw)
To: kexec
Whenever I try to use kexec in a xen domU, the domain just reboots all
the way through the bios rather than loading the kexec'ed kernel with
the given command line. Is this a known issue? I've tried with both
systemctl kexec and kexec -e.
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: kexec not working in xen domU?
2020-12-09 19:09 kexec not working in xen domU? Phillip Susi
@ 2020-12-14 18:52 ` Guilherme G. Piccoli
2020-12-14 20:08 ` Phillip Susi
0 siblings, 1 reply; 6+ messages in thread
From: Guilherme G. Piccoli @ 2020-12-14 18:52 UTC (permalink / raw)
To: Phillip Susi; +Cc: xen-devel, kexec mailing list
On Wed, Dec 9, 2020 at 4:13 PM Phillip Susi <phill@thesusis.net> wrote:
>
> Whenever I try to use kexec in a xen domU, the domain just reboots all
> the way through the bios rather than loading the kexec'ed kernel with
> the given command line. Is this a known issue? I've tried with both
> systemctl kexec and kexec -e.
>
Can you capture the serial console in a pastebin? Maybe add something
like "earlyprintk=ttySX", where ttySX is your known-to-work serial
console output. This helps to determine if it's a shutdown issue or an
early boot problem.
Also, worth to CC Xen mailing-list in this discussion I guess, I'm CCing them.
Cheers,
Guilherme
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: kexec not working in xen domU?
2020-12-14 18:52 ` Guilherme G. Piccoli
@ 2020-12-14 20:08 ` Phillip Susi
2020-12-17 17:34 ` Guilherme G. Piccoli
0 siblings, 1 reply; 6+ messages in thread
From: Phillip Susi @ 2020-12-14 20:08 UTC (permalink / raw)
To: Guilherme G. Piccoli; +Cc: xen-devel, kexec mailing list
Guilherme G. Piccoli writes:
> Can you capture the serial console in a pastebin? Maybe add something
> like "earlyprintk=ttySX", where ttySX is your known-to-work serial
> console output. This helps to determine if it's a shutdown issue or an
> early boot problem.
The regular xen cosole should work for this shouldn't it? So
earlyprintk=hvc0 I guess? I also threw in console=hvc0 and loglevel=7:
[ 184.734810] systemd-shutdown[1]: Syncing filesystems and block
devices.
[ 185.772511] systemd-shutdown[1]: Sending SIGTERM to remaining
processes...
[ 185.896957] systemd-shutdown[1]: Sending SIGKILL to remaining
processes...
[ 185.901111] systemd-shutdown[1]: Unmounting file systems.
[ 185.902180] [1035]: Remounting '/' read-only in with options
'errors=remount-ro'.
[ 185.990634] EXT4-fs (xvda1): re-mounted. Opts: errors=remount-ro
[ 186.002373] systemd-shutdown[1]: All filesystems unmounted.
[ 186.002411] systemd-shutdown[1]: Deactivating swaps.
[ 186.002502] systemd-shutdown[1]: All swaps deactivated.
[ 186.002529] systemd-shutdown[1]: Detaching loop devices.
[ 186.002699] systemd-shutdown[1]: All loop devices detached.
[ 186.002727] systemd-shutdown[1]: Stopping MD devices.
[ 186.002814] systemd-shutdown[1]: All MD devices stopped.
[ 186.002840] systemd-shutdown[1]: Detaching DM devices.
[ 186.002974] systemd-shutdown[1]: All DM devices detached.
[ 186.003017] systemd-shutdown[1]: All filesystems, swaps, loop
devices, MD devices and DM devices detached.
[ 186.168475] systemd-shutdown[1]: Syncing filesystems and block
devices.
[ 186.169150] systemd-shutdown[1]: Rebooting with kexec.
[ 186.418653] xenbus_probe_frontend: xenbus_frontend_dev_shutdown:
device/vbd/5632: Initialising != Connected, skipping
[ 186.427377] kexec_core: Starting new kernel
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: kexec not working in xen domU?
2020-12-14 20:08 ` Phillip Susi
@ 2020-12-17 17:34 ` Guilherme G. Piccoli
2020-12-17 21:25 ` Phillip Susi
0 siblings, 1 reply; 6+ messages in thread
From: Guilherme G. Piccoli @ 2020-12-17 17:34 UTC (permalink / raw)
To: Phillip Susi; +Cc: xen-devel, kexec mailing list
On Mon, Dec 14, 2020 at 5:25 PM Phillip Susi <phill@thesusis.net> wrote:
> The regular xen cosole should work for this shouldn't it? So
> earlyprintk=hvc0 I guess? I also threw in console=hvc0 and loglevel=7:
>
> [ 184.734810] systemd-shutdown[1]: Syncing filesystems and block
> devices.
> [ 185.772511] systemd-shutdown[1]: Sending SIGTERM to remaining
> processes...
> [ 185.896957] systemd-shutdown[1]: Sending SIGKILL to remaining
> processes...
> [ 185.901111] systemd-shutdown[1]: Unmounting file systems.
> [ 185.902180] [1035]: Remounting '/' read-only in with options
> 'errors=remount-ro'.
> [ 185.990634] EXT4-fs (xvda1): re-mounted. Opts: errors=remount-ro
> [ 186.002373] systemd-shutdown[1]: All filesystems unmounted.
> [ 186.002411] systemd-shutdown[1]: Deactivating swaps.
> [ 186.002502] systemd-shutdown[1]: All swaps deactivated.
> [ 186.002529] systemd-shutdown[1]: Detaching loop devices.
> [ 186.002699] systemd-shutdown[1]: All loop devices detached.
> [ 186.002727] systemd-shutdown[1]: Stopping MD devices.
> [ 186.002814] systemd-shutdown[1]: All MD devices stopped.
> [ 186.002840] systemd-shutdown[1]: Detaching DM devices.
> [ 186.002974] systemd-shutdown[1]: All DM devices detached.
> [ 186.003017] systemd-shutdown[1]: All filesystems, swaps, loop
> devices, MD devices and DM devices detached.
> [ 186.168475] systemd-shutdown[1]: Syncing filesystems and block
> devices.
> [ 186.169150] systemd-shutdown[1]: Rebooting with kexec.
> [ 186.418653] xenbus_probe_frontend: xenbus_frontend_dev_shutdown:
> device/vbd/5632: Initialising != Connected, skipping
> [ 186.427377] kexec_core: Starting new kernel
>
Hm..not many prints, either earlyprintk didn't work, or it's a really
early boot issue. Might worth to investigate if it's not a purgatory
issue too - did you try to use the ""new"" kexec syscall, by running
"kexec -s -l" instead of just "kexec -l" ?
Also, worth to try that with upstream kernel and kexec-tools - I
assume you're doing that already?
Cheers,
Guilherme
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: kexec not working in xen domU?
2020-12-17 17:34 ` Guilherme G. Piccoli
@ 2020-12-17 21:25 ` Phillip Susi
2020-12-18 20:59 ` Phillip Susi
0 siblings, 1 reply; 6+ messages in thread
From: Phillip Susi @ 2020-12-17 21:25 UTC (permalink / raw)
To: Guilherme G. Piccoli; +Cc: xen-devel, kexec mailing list
Guilherme G. Piccoli writes:
> Hm..not many prints, either earlyprintk didn't work, or it's a really
> early boot issue. Might worth to investigate if it's not a purgatory
> issue too - did you try to use the ""new"" kexec syscall, by running
> "kexec -s -l" instead of just "kexec -l" ?
> Also, worth to try that with upstream kernel and kexec-tools - I
> assume you're doing that already?
I tried with -s and it didn't help. So far I tried it originally on my
Ubuntu 20.04 amazon vps, then on my debian testing ( linux 5.9.0 ) on my
local xen server. I'll try building the latest upstream kernel and
kexec tomorrow.
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: kexec not working in xen domU?
2020-12-17 21:25 ` Phillip Susi
@ 2020-12-18 20:59 ` Phillip Susi
0 siblings, 0 replies; 6+ messages in thread
From: Phillip Susi @ 2020-12-18 20:59 UTC (permalink / raw)
To: Guilherme G. Piccoli; +Cc: xen-devel, kexec mailing list
Phillip Susi writes:
> I tried with -s and it didn't help. So far I tried it originally on my
> Ubuntu 20.04 amazon vps, then on my debian testing ( linux 5.9.0 ) on my
> local xen server. I'll try building the latest upstream kernel and
> kexec tomorrow.
Built the latest kexec-tools and linux kernel from git today and get
the same results. Is there a minimum version of xen required for this
to work? I have no idea what Amazon is running but my server has 4.9.
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2020-12-18 21:15 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2020-12-09 19:09 kexec not working in xen domU? Phillip Susi
2020-12-14 18:52 ` Guilherme G. Piccoli
2020-12-14 20:08 ` Phillip Susi
2020-12-17 17:34 ` Guilherme G. Piccoli
2020-12-17 21:25 ` Phillip Susi
2020-12-18 20:59 ` Phillip Susi
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox