Xen 2.6.25 dom0 kernel ebuild

Mathijs · n00b Joined: 25 Sep 2007 Posts: 29

True, because until now i see no other solution.
You do?

Scorpion265 · Posted: Thu Feb 25, 2010 3:31 pm Post subject:

Did you get your updates into portage?

Scorpion265 · Posted: Thu Feb 25, 2010 5:39 pm Post subject:

Also, since we're all xen users... has anyone had any problems upgrading glibc? My issue here: https://forums.gentoo.org/viewtopic-p-6168649.html#6168649

it only happens in the domUs. dom0 built glibc fine.

meyerm · Posted: Thu Feb 25, 2010 6:14 pm Post subject:

Hi,

first let me say a big thank you for providing newer xen-kernels for Gentoo. I'll wait for a 2.6.32-version (since it is said this will be supported longer and stabilized by Suse and Redhat) before trying to go productive but am toying around with your current kernels at the moment.

Just to add for those who had problems with 2.6.31-xen-r10: I experienced the crashes under load, too. Now with 2.6.31-xen-r11 the problems seem to be gone. I just started a "cat /dev/urandom > /dev/null" on each CPU and will let it run at least over the night to be really sure. For now it already runs for ca. 2 hours stable.

andylyon · n00b Joined: 13 Jun 2006 Posts: 74

meyerm · Posted: Fri Feb 26, 2010 3:47 pm Post subject:

Mathijs · n00b Joined: 25 Sep 2007 Posts: 29

I just tested 2.6.33 and both dom0 and domU compile fine and work.
Live migration is also working.
I did not see any bad behavior yet, when i do i'll let you know here.

Thank you for the ebuild.

stof · n00b Joined: 04 Nov 2008 Posts: 15 Location: Germany

Any news on stability of xen-sources-2.6.31-r11?

meyerm · Posted: Sun Mar 14, 2010 5:39 pm Post subject:

Well, I'm not yet very happy. Since this is a development machine I didn't need to install any domU until now. But I won't do that and wait for 2.6.32 because of the follwing problems with xen 3.4.2-r1:

meyerm · Posted: Wed Apr 07, 2010 1:37 pm Post subject:

I just switched to 2.6.32-xen-r1 and this is what I see in the kernel log right after booting:

meyerm · Posted: Tue May 11, 2010 3:13 pm Post subject:

Anybody already using xen-4.0? Will you/andylyon provide new xen-sources for xen-4.0?

2bbionic · Apprentice Joined: 24 Mar 2005 Posts: 152

@meyerm: I use the new XEN 4 for about three days now with the 2.6.32-xen-r1 kernel on a 32bit system. No problems so far...

vr13 · n00b Joined: 02 Sep 2008 Posts: 24 Location: ru

2meyerm: seems to work stable with 2.6.32-xen-r1@x86_64:

meyerm · Posted: Tue May 11, 2010 9:28 pm Post subject:

Mh, thank you both for answering. I tried the xen 4.0 and xen-sources 2.6.32-r1 - both from the portage tree. But even though it starts, I still have the problem mentioned above. Did anybody of you compile in the soft lockup detection into the kernel? If not, does anybody of you have a possibility to play around with that setting and check if you see the same problem?

Perhaps it has to do something with my Serial-Over-LAN-setting of the server which forwards the serial console to a service processor? I can't see xen when booting but only the kernel and userspace on the serial console (or just xen and the kernel but no userspace...) - but this problem ist probably just a misconfiguration by me (see below). I just mention it, if it is connected to the soft lockup (vgacon_cursor).

meyerm · Posted: Wed May 12, 2010 3:34 pm Post subject:

Guys, I guess I found the problem. I do not understand the real reason behind it. But I now know how to prevent the soft lockup messages...

Since I had bad experiences with Xen at the beginning of crashing and freezing my computer, I decided to continue step by step. So my first step was setting up a nice, working envorinment with gentoo-sources. After that I added Xen and started xen-sources on it. I did NOT start xend or did any other configurations within Xen until this point.

Since nobody was able to help me with my soft lockup problems, I decided to start creating a xen config for now and did hope for a later version of xen-sources solving my problems. And after starting xend (which takes a lot of time) these messages no longer appear in my dmesg... I do not yet understand the reason why the kernel has these problems when running without xend. But for now I'm happy ;-)

So, short for people coming over search engines: Starting a dom0 on top of the Xen-HV without starting xend seems to lead to soft lockup errors in the kernel.

amissus · Posted: Thu Jul 01, 2010 11:35 am Post subject:

I have strange issue with HVM mode.
When I sometimes hardly shutdown HVM domain (xm destroy) it causes "xen stops working". Domain 0 is still functional, no kernel panic or freezing, but it isn't possible to create U domains until reboot domain 0 (no matter if PVM or HVM). When xm create is initiated it waits a few minutes and there write something about error in xen hotplug script. Have someone experienced this behaviour too?

lopb · Posted: Wed Sep 01, 2010 9:14 pm Post subject:

Mathijs · n00b Joined: 25 Sep 2007 Posts: 29

And you know for sure the domU does not come up? Did you try pinging it from another machine?
Because that's exactly how it looks when your console is not set up right in your domU config.

Scorpion265 · Posted: Tue Oct 19, 2010 7:58 pm Post subject:

Is there any chance of getting the cleancache patches merged in so we can have tmem support on a gentoo dom0?