search for: dom0

Displaying 20 results from an estimated 5746 matches for "dom0".

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2008 May 06
7
Disable memory balloon in dom0
Is there any reason why I would not want to set dom0-min-mem to 0 or to what I set dom0_mem on my kernel line? Setting to 0 or setting to the same value as dom0_mem disables memory balloon correct? I cant seem to think of a reason why I would want memory ballooning. Also setting dom0-min-mem should that be done in xend-config.sxp or on the kerne...
2011 Oct 18
3
Possible hint for "Clocksource tsc unstable" problem
Hello, I made an interesting observation related to the "Clocksource tsc unstable (delta = -2999660320319 ns)" problem. In the log of ntpd I found: Oct 5 03:46:35 greenville-dom0 ntpd[4020]: kernel time sync status change 6001 Oct 5 04:03:41 greenville-dom0 ntpd[4020]: kernel time sync status change 2001 Oct 5 05:29:03 greenville-dom0 ntpd[4020]: kernel time sync status change 6001 Oct 5 05:46:09 greenville-dom0 ntpd[4020]: kernel time sync status change 2001 Oct 5...
2007 Sep 03
5
Dom0 <> DomU clock sync
Hello ! Just a quick question about time synchronization between xen dom0 and domUs... We''re running Xen 3.1 64-bit, with 32 and 64 bits linux guests. It''s up since 89 days and the domU''s time is around 5 minutes behind the dom0, which is updated via ntpdate... Any idea why it doesn''t sync the guests even that /proc/sys/xen/indep...
2011 Jun 06
1
dom0 dedicated memory Xen dom0 dedicated memory and preventing dom0 memory ballooning
I''m trying to configure GRUB to allocate fixed amount of dedicated memory to dom0, according to this best practices thread (http://wiki.xensource.com/xenwiki/XenBestPractices | "Xen dom0 dedicated memory and preventing dom0 memory ballooning "). When I reboot, dom0 has the fixed amount of memory as it was configured, but neither xm info shows the rest of memory ava...
2008 Feb 20
1
Issue with dom0 xen ballooning
Hi all, I'm having issue with my Centos 5.1 /Xen installation. I'm having some dom0 running 2.6.18-53.1.6.el5xen (x86_64). On the dom0 where the load is high (more than 70% of total system memory consumed by dom0 and domU) we have a lot of "memory squeeze ". The result is that the domU seems to be blocked (no network/no disk acces/ etc....). Looking for a solution i...
2010 Dec 20
16
Network isolation - PCI passthrough question
Hello, I thinking about using PCI passthrough to dedicated a domU as firewall. I understand PCI passthrough concept. When done, my domU will see network card and the dom0 won''t any more. So I''ll be able to filter all trafic from outside, since it will go through network domU. Then, how will I be able to connect other domU (and maybe dom0) to the network domU ? In a normal way, creating domU makes dom0 creating vif interfaces and bridge (in my con...
2009 Jul 18
26
network misbehaviour with gplpv and 2.6.30
With GPLPV under 2.6.30, GPLPV gets the following from the ring: ring slot n (first buffer): status (length) = 54 bytes offset = 0 flags = NETRXF_extra_info (possibly csum too but not relevant) ring slot n + 1 (extra info) gso.size (mss) = 1460 Because NETRXF_extra_info is not set, that''s all I get for that packet. In the IP header though, the total length is 1544 (which in itself
2009 Jul 18
26
network misbehaviour with gplpv and 2.6.30
With GPLPV under 2.6.30, GPLPV gets the following from the ring: ring slot n (first buffer): status (length) = 54 bytes offset = 0 flags = NETRXF_extra_info (possibly csum too but not relevant) ring slot n + 1 (extra info) gso.size (mss) = 1460 Because NETRXF_extra_info is not set, that''s all I get for that packet. In the IP header though, the total length is 1544 (which in itself
2012 Dec 04
2
Xen dom0 load affecting domUs
Hello folks, I have a Xen server running on Centos 6.2 with 3.6.6-1.el6xen.x86_64 as the Dom0 kernel, and i have dedicted 2 CPUs and 4G ram for the Dom0.I have close to 4-5 Virtual machines running on the Xen server. The problem is that for some reason,carrying outany CPU/Disk intensive task on the Dom0 seems to be affecting the DomUs adversly.For ex.i noticed that my Domus become extreml...
2009 Nov 23
18
OpenSuSE 11.2 bug, dom0-cpus limit causes xenwatch_cb running 100% and xm command freeze and xend dead
Hi all, I have upgraded a test machine from OpenSuSE 11.1 to 11.2. I have found following bug: the server is a 2x quadcore intel box also 2x4=8cpu If you limit the dom0 cpu with dom0-cpus= [1-7]: - [xenwatch_cb] is running 100% cpu and makes var log entry every 65 sec BUG: soft lockup - CPU#X stuck for 61s! - xm commands not work - xend is dead if set dom0-cpus to 0 or 8: - everything looks fine Can somebody else confirm that bug? Best regards Udo Attila Fi...
2011 May 19
5
vcpu-pin cause dom0 kernel panic
I use xen 4.0(dom0 is suse11.sp1,2.6.32 x86_64) on Dell R710 with PERC H700 RAID adapter. --Intel(R) Xeon(R) CPU E5620 @ 2.40GHz --8 CPU cores. --Memory 64G --RAID5 4.5T When I dedicated (pin) a CPU core only for dom0 use. (I specify "dom0_max_vcpus=1 dom0_vcpus_pin" options for Xen) I got dom0 kernel pan...
2008 Jan 28
5
XEN - ZFS
Hello, I read, and know, that ZFS + XEN are not works well together. (I''ve only 512MB for Dom0). How I can disable/off all ZFS stuff to have more usable memory to Dom0. Regards Maciej
2008 Jan 27
3
Network issue in dom0
Hello, I have a network issue in dom0; I''m not sure if it''s a configuration problem or a design problem in my setup. My setup: The server (dom0) runs Ubuntu 7.10, Xen was installed using apt-get (means version: Xen 3.10, Kernel 2.6.22-14). This server has 4 NICs. I use bridged networking with my own script whic...
2009 Nov 06
18
xenoprof: operation 9 failed for dom0 (status: -1)
Renato, When I tried running "opcontrol --start" (after previously running "opcontrol --start-daemon") in dom0, I get this error message: /usr/local/bin/opcontrol: line 1639: echo: write error: Operation not permitted and this message in the Xen console: (XEN) xenoprof: operation 9 failed for dom 0 (status : -1) It looks like opcontrol is trying to do this: echo 1 > /dev/oprofile/enable and it is fa...
2009 Nov 06
18
xenoprof: operation 9 failed for dom0 (status: -1)
Renato, When I tried running "opcontrol --start" (after previously running "opcontrol --start-daemon") in dom0, I get this error message: /usr/local/bin/opcontrol: line 1639: echo: write error: Operation not permitted and this message in the Xen console: (XEN) xenoprof: operation 9 failed for dom 0 (status : -1) It looks like opcontrol is trying to do this: echo 1 > /dev/oprofile/enable and it is fa...
2012 Mar 19
16
LV resize encrypted volume
Hi, dom0: Debian Lenny 2.6.26-2-xen-amd64, domU: same. Xen 3.2-1 After resizing a LV on dom0, Xen is not reporting the new extended size to the PV domU even though dom0 is well aware of the new size. I''ve rebooted domU (not dom0 yet as that''s running a lot of other domU''s). The...
2010 May 21
10
What''s the different for "dom0_max_vcpus=4 dom0_vcpus_pin" and "dom0_max_vcpus=4" ?
Hi experts, Q1:What''s the different for "dom0_max_vcpus=4 dom0_vcpus_pin" and "dom0_max_vcpus=4" ? which will get better performance Q2: dom0_max_vcpus=4 means "core0-3 will be just used by dom0" or means "4 cores(not dedicate cores) will be used by dom0, eg: core2-5 or core3-6? Q3.what does mean "nosmp&quo...
2010 May 21
10
What''s the different for "dom0_max_vcpus=4 dom0_vcpus_pin" and "dom0_max_vcpus=4" ?
Hi experts, Q1:What''s the different for "dom0_max_vcpus=4 dom0_vcpus_pin" and "dom0_max_vcpus=4" ? which will get better performance Q2: dom0_max_vcpus=4 means "core0-3 will be just used by dom0" or means "4 cores(not dedicate cores) will be used by dom0, eg: core2-5 or core3-6? Q3.what does mean "nosmp&quo...
2007 Nov 27
6
Passthrough support ?
Hi , I have been trying to understand PCI -passthrough support. Please correct me if I am wrong in my following inferences. 1. Device emulation and pass through are both implemented using split drivers. 2. But, in case of emulation drivers of dom0 are used where as in case of passthrough ( as the name suggests ) native drivers in domU are used . 3. dom0 provides a virtual PCI device { an interface for device-OPs and status of this virtual device} to domU and through associated event channel domU makes "synchronous" use of...
2007 Nov 27
6
Passthrough support ?
Hi , I have been trying to understand PCI -passthrough support. Please correct me if I am wrong in my following inferences. 1. Device emulation and pass through are both implemented using split drivers. 2. But, in case of emulation drivers of dom0 are used where as in case of passthrough ( as the name suggests ) native drivers in domU are used . 3. dom0 provides a virtual PCI device { an interface for device-OPs and status of this virtual device} to domU and through associated event channel domU makes "synchronous" use of...