[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [BUG] invocation of xl create with insufficient memory for new domU causes system reboot
01.04.2014 13:52, Ian Campbell ÐÐÑÐÑ: On Tue, 2014-04-01 at 13:35 +0400, Georgy V. Repin wrote:Hello! 1. Problem: invocation of xl create when there is not enough memory to create new domU causes oom to select process to kiill; when oom selects to kill quemu-system-* process, this causes kernel panic (it's my suppose, because i see no message "kernel panic" in log, but i do see "CPU: 0 PID: 7899 Comm: qemu-system-i38 Not tainted 3.10.17-gentoo #1" + failed call trace), and, therefore (assuming default settings) kernel reboot (see log at "4.") Couple of remarks: - fix checking of available memory for new domU in xl toolstack could serve as workaround - real cause is not clear to me, maybe it's not even a xen bug (quemu ? kernel ?)Are you using dom0_mem= together with auto ballooning enabled in the toolstack? informika-xen-3 ~ # cat /proc/cmdline placeholder root=/dev/sda1 ro part of grub.cfg if [ "$grub_platform" = "pc" -o "$grub_platform" = "" ]; then xen_rm_opts= else xen_rm_opts="no-real-mode edd=off" fi multiboot /boot/xen-4.gz placeholder ${xen_rm_opts} echo 'Loading Linux 3.10.17-gentoo ...' module /boot/vmlinuz-3.10.17-gentoo placeholder root=/dev/sda1 ro xl.conf: # Control whether dom0 is ballooned down when xen doesn't have enough # free memory to create a domain. "auto" means only balloon if dom0 # starts with all the host's memory. #autoballoon="auto" So: - no dom0_mem= as boot param - autobaloon is set to default ("auto", i suppose) I think it was Xen 4.4 which gained the ability to detect dom0_mem= and disable ballooning automatically in that case, but I might be misremembering. Ian. -- Ð ÑÐÐÐÐÐÐÐÐ, ÐÐÐÑÐÐÐ ÐÐÐÐÐ ÐÐÐÐ ÐÐÐÐ ÐÐÐ "ÐÐÑÐÑÐÐÐÐ" http://www.informika.ru http://www.runnet.ru _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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