similar to: What''s the different for "dom0_max_vcpus=4 dom0_vcpus_pin" and "dom0_max_vcpus=4" ?

Hi experts, I boot the xen4.0.0 with gpxe and boot xen 32 bit works well but when I try boot xen 64 bit, the error happens (XEN)Brought up 16 cpus (XEN) *** LOADING DOMAIN 0 *** (XEN) **************************************** (XEN) Panic on CPU 0: (XEN) crc error (XEN) **************************************** Can you give me a light? Thanks Lei -- "We learn from failure, not from

Hi experts, I boot the xen4.0.0 with gpxe and boot xen 32 bit works well but when I try boot xen 64 bit, the error happens (XEN)Brought up 16 cpus (XEN) *** LOADING DOMAIN 0 *** (XEN) **************************************** (XEN) Panic on CPU 0: (XEN) crc error (XEN) **************************************** Can you give me a light? Thanks Lei -- "We learn from failure, not from

Hi experts,'' I build xen on my 64 bit redhat with "make xen", I got the image xen-4.0.0.gz then $gunzip xen-4.0.0.gz $file xen-4.0.0 it tells me it''s 32 bit,but I saw it link the 64 bit lib Thanks Lei -- "We learn from failure, not from success!" _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com

Hi experts,'' I build xen on my 64 bit redhat with "make xen", I got the image xen-4.0.0.gz then $gunzip xen-4.0.0.gz $file xen-4.0.0 it tells me it''s 32 bit,but I saw it link the 64 bit lib Thanks Lei -- "We learn from failure, not from success!" _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com

Hi Pasik, Do we have a way to build a 2.6.34 kernel as dom0 kernel can you show me the way? Thanks Lei _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users

Hi experts I have a machine which have 5 hard disk I want to use glusterfs to fast my disk my machine's IP is 123.224.178.67 my steps 1)create the volume gluster volume create vol1 123.224.178.67:/buildarea2 123.224.178.67:/buildarea3 123.224.178.67:/buildarea4 123.224.178.67:/buildarea5 123.224.178.67: /buildarea6 2)start the volume gluster volume start vol1 3)mount the volume

Hi Pasi, if I don''t change the tty to hvc it will stopped on Kernel 2.6.31.13 on i686 (console) localhost login: root Kernel 2.6.31.13 on i686 (console) localhost login: root Kernel 2.6.31.13 on i686 (console) localhost login: root After I change it to hvc0 followed the twiki page the log is Remounting root filesystem in read-write mode: [ OK ] Mounting local filesystems: [ OK

Dear All I am using Centos 7 with Xen 4.6 on a Dell Poweredge T430 When the machine boots, after the 'Scrubbing Free RAM' message, I get a screen filled with little white squares until the login prompt, so I cannot see what is happening as the machine boots. Also there is nothing on the screen when I reboot. My /etc/default/grub is GRUB_DISTRIBUTOR="$(sed 's, release

Hi All it is possible to tune dom0/domU for better IO/network performance? Since I have changed to Cenots7 dom0, I have a really poor IO performance inside a PV VM. I have already done what is described on http://wiki.xenproject.org/wiki/Tuning_Xen_for_Performance It is better now but still significantly worse than with centos6 dom0 my settings: xen parameter: dom0_mem=1024M cpufreq=xen

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 panic error(pin-1-5.30.bmp) When I pin 2 core to dom0, the dom0 system can boot up,

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

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

Hi, Seeing a drop-off in iops when more vcpu''s are added:- 3.8.2 kernel/xen-4.2.1/single domU/LVM backend/8GB RAM domU/2GB RAM dom0 dom0_max_vcpus=2 dom0_vcpus_pin domU 8 cores fio result 145k iops domU 10 cores fio result 99k iops domU 12 cores fio result 89k iops domU 14 cores fio result 81k iops ioping . -c 3 4096 bytes from . (ext4 /dev/xvda1): request=1 time=0.1 ms 4096 bytes

If this has already been done, please forgive me. However, if not, I''d like to submit this as a mechanism for generating a bootable grub2 stanza for hypervisors. As the /etc/grub.d/* files rely on defaults in /etc/default/grub, I added the following Xen specific variable: GRUB_CMDLINE_XEN_DEFAULT="console=com1 115200,8n1 dom0_mem=512M dom0_max_vcpus=1 dom0_vcpus_pin=true

This caused particularly poor performance when booting a server in uniprocessor mode for debugging reasons, and had 4 dom0 vcpus competing for 1pcpus worth of time. -- Andrew Cooper - Dom0 Kernel Engineer, Citrix XenServer T: +44 (0)1223 225 900, http://www.citrix.com _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel

Hi All, Running into temporary pauses in our VMs which correspond to these errors in dmesg on the dom0: [1721485.352560] SLUB: Unable to allocate memory on node -1 (gfp=0x20) [1721485.352563] cache: kmalloc-2048, object size: 2048, buffer size: 2048, default order: 3, min order: 0 [1721485.352566] node 0: slabs: 81, objs: 1296, free: 0 [1721485.352576] swapper: page allocation failure:

Hello everyone, I just put together a brand new system, and I''m getting the following when I try to start a domU: > [ 1902.049066] xend[12924]: segfault at b9ff6cd8 ip 00007f36c474afe1 sp 00007f36b9ff6af8 error 4 in libxenguest.so.4.0.0[7f36c4730000+24000] This is on an AMD CPU with the AVX instructions, and I already have this in my grub.cfg: > multiboot /xen-4.1.2.gz

Hi experts I use xen-4.0.0 and dom0 is 2.6.33 and domU is 2.6.34 #lspci ............... 01:00.0 Ethernet controller: Intel Corporation Unknown device 10a7 (rev 02) 01:00.1 Ethernet controller: Intel Corporation Unknown device 10a7 (rev 02) 05:00.0 Ethernet controller: Intel Corporation 82571EB Gigabit Ethernet Controller (rev 06) 05:00.1 Ethernet controller: Intel Corporation 82571EB Gigabit

Dear George, Thanks for the input and ideas. Unfortunately bootscrub=false dos not work, not does setting nothing for vga, still get the 'Little white squares'! I am asking the xen-users as you suggest Regards, Francis From: "George Dunlap" <dunlapg at umich.edu> To: "Francis Greaves" <francis at choughs.net>, "centos-virt" <centos-virt

Yes I usually work headless, but I have been setting it up from new, so need to see what is going on. Regards Francis From: "Scot P. Floess" <sfloess at nc.rr.com> To: "Francis Greaves" <francis at choughs.net> Cc: "centos-virt" <centos-virt at centos.org> Sent: Monday, 22 February, 2016 17:02:12 Subject: Re: [CentOS-virt] Garbled screen