Bug#414040: kernel: xen_net: Memory squeeze in netback driver.
Hi, you have to limit dom0 memory on two places, xen hypervisor option and xend config. In this example below I limit memory to 256MB: /boot/grub/menu.lst 87c87 # xenhopt= --- # xenhopt=dom0_mem=256M /etc/xen/xend-config.sxp 120c120 (dom0-min-mem 196) --- (dom0-min-mem 256) After changing /boot/grub/menu.lst you have to run update-grub and reboot the machine. After changing /etc/xen/xend-config.sxp you have to restart xend with /etc/init.d/xend restart. With this I have no more problems with my netback driver on my ~10 dom0s running plain Debian 4.0. (My biggest machine has a uptime of over 45 days and handles ~20 domUs. Also a lot of live migration are happening to and from this host.) So for me this bug doesn't renders package unusable. I'm very happy with the xen packages from Debian 4.0 so i can setup a whole bunch of dom0s in a very short time. -- greetings eMHa pgp2ScEjE6ynq.pgp Description: PGP signature
Bug#414040: [Pkg-xen-devel] Bug#414040: kernel: xen_net: Memory squeeze in netback driver.
Am Freitag, 9. März 2007 04:07 schrieb Nate Carlson: On Thu, 8 Mar 2007, Bob Tanner wrote: Package: xen-hypervisor-3.0.3-1-amd64 Version: 3.0.3-0-2 Severity: grave Justification: renders package unusable This bug looks to be tracked in upstream: http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=762 Mailing list discussion here: http://lists.xensource.com/archives/html/xen-bugs/2006-11/msg00030.html IIRC, a workaround is to set a 'dom0_mem' parameter on bootup, so it doesn't have to shrink dom0's memory to start the guest domains. Hi Nate, Bob all, dom0_mem often helps, when it comes to problems with memory management, especially when pae-kernel hypervisor are used. It helps for example when you have buggy hardware, that is not really 100% pae (48bit addressing) capabale. But I haven't watched the phenomena that setting dom0_mem fixes the memory squeenze error message that xen brings on some systems. But on all systems I saw this error, this never brings the whole system down or crashes something or so. It's just ugly. For me the first questions is, if the reporter (Bob Tanner) really has the problem that this makes xen unuseable at all? The bug report itself is rather short and only linking to an upstream bug report. Even this upstream bug report is not very exact. One is telling about his amd64bit system (2.6.17 debian kernel with the debian xen-hypervisor which is quite outdated and not anymore supported within debian) and someone else responses I got the same with pae (so obviously not on amd64, but no clue if on debian or even on some else distribution). But none of the xen guys reacted on this ticket so far. If this is really a bug that makes xen unusable than I am quite sure this is an upstream problem and the xen guys are the right ones to fix this. Bob, can you give more info on why this makes your system ununsable? Have you seen domUs crash or even your whole system? Were you able to write the exact kernel oopses down? Have you tried setting (dom0-min-mem 196) (or even more MB for dom0) and maybe also (dom0-cpus 1) in /etc/xen/xend-config.sxp? regards, Ralph
Bug#414040: kernel: xen_net: Memory squeeze in netback driver.
Package: xen-hypervisor-3.0.3-1-amd64 Version: 3.0.3-0-2 Severity: grave Justification: renders package unusable This bug looks to be tracked in upstream: http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=762 Mailing list discussion here: http://lists.xensource.com/archives/html/xen-bugs/2006-11/msg00030.html -- System Information: Debian Release: 4.0 APT prefers testing APT policy: (500, 'testing') Architecture: amd64 (x86_64) Shell: /bin/sh linked to /bin/bash Kernel: Linux 2.6.18-3-xen-amd64 Locale: LANG=en_US, LC_CTYPE=en_US (charmap=ISO-8859-1) Versions of packages xen-hypervisor-3.0.3-1-amd64 depends on: ii xen-utils-3.0.3-1 3.0.3-0-2 XEN administrative tools xen-hypervisor-3.0.3-1-amd64 recommends no packages. -- no debconf information -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Bug#414040: [Pkg-xen-devel] Bug#414040: kernel: xen_net: Memory squeeze in netback driver.
On Thu, 8 Mar 2007, Bob Tanner wrote: Package: xen-hypervisor-3.0.3-1-amd64 Version: 3.0.3-0-2 Severity: grave Justification: renders package unusable This bug looks to be tracked in upstream: http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=762 Mailing list discussion here: http://lists.xensource.com/archives/html/xen-bugs/2006-11/msg00030.html IIRC, a workaround is to set a 'dom0_mem' parameter on bootup, so it doesn't have to shrink dom0's memory to start the guest domains. | nate carlson | [EMAIL PROTECTED] | http://www.natecarlson.com | | depriving some poor village of its idiot since 1981| -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
