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I have migrated KVM VMs from a CentOS 6 to a CentOS 7 host. All work fine post-migration, CentOS 3 (don't ask ...), CentOS 6, CentOS 7, Windows. But the CentOS 5 VMs failed. At some point during the boot process, they became unpingable and also inaccessible. I have correlated this to the start of the irqbalance service and was wondering if it is generally considered best practice to turn it off. The VMs in question all have at least 2 vcpus, and the C5 VMs are the odd ones out.

...entific Computing Facilities, Grid Facilities Department, FermiGrid Services Group, Assistant Group Leader. ---------- Forwarded message ---------- Date: Thu, 17 Apr 2008 20:24:48 -0500 (CDT) From: Steven Timm <timm@fnal.gov> To: xen-users@lists.xensource.com Subject: help--dom0 network goes unpingable when xend starts I installed 64-bit xen 3.1.0 (from xensource.com tarballs) on three new machines today, using a configuration setup that I''ve used successfully many times before. However, I encountered a new problem. These are Dell Poweredge 1950 servers, by the way. >From lspci 04...

BUG: soft lockup detected on CPU#0! Pid: 2213, comm: smbiod EIP: 0061:[<f4990f2e>] CPU: 0 EIP is at smbiod+0x116/0x16d [smbfs] EFLAGS: 00000246 Tainted: GF (2.6.16-xen-automount #1) EAX: 00000000 EBX: f4996400 ECX: f2c99f68 EDX: f2c98000 ESI: f2c98000 EDI: c06f5780 EBP: f2c99fb8 DS: 007b ES: 007b CR0: 8005003b CR2: b7f77000 CR3: 326e2000 CR4: 00000640

...minutes apart): When migrating from a host with lower uptime to a host with higher uptime, the VM looses it''s network connection for some time and then continues after some minutes (roughly equivalent to the difference in uptime?). There are two different symptoms: Either the VM becomes unpingable, or the VM is pingable but the ssh-connection freezes: a while-loop dumping /proc/uptime freezes and continues without a jump after the freeze is over. When looking at the output of dmesg of the domU, I also see a jump in the timestamp: [1967742.320218] eth0: no IPv6 routers present [1968779.21...

...t-xs.de www.internet-xs.de Am 24.04.2020 um 11:53 schrieb isdtor: > I have migrated KVM VMs from a CentOS 6 to a CentOS 7 host. All work fine post-migration, CentOS 3 (don't ask ...), CentOS 6, CentOS 7, Windows. But the CentOS 5 VMs failed. At some point during the boot process, they became unpingable and also inaccessible. > > I have correlated this to the start of the irqbalance service and was wondering if it is generally considered best practice to turn it off. The VMs in question all have at least 2 vcpus, and the C5 VMs are the odd ones out. > > ________________________________...

...24/04/2020 11:53 AM Subject: [CentOS-virt] VM migration problems I have migrated KVM VMs from a CentOS 6 to a CentOS 7 host. All work fine post-migration, CentOS 3 (don't ask ...), CentOS 6, CentOS 7, Windows. But the CentOS 5 VMs failed. At some point during the boot process, they became unpingable and also inaccessible. I have correlated this to the start of the irqbalance service and was wondering if it is generally considered best practice to turn it off. The VMs in question all have at least 2 vcpus, and the C5 VMs are the odd ones out. -------------- next part -------------- An HTML...

...338 guests is enough for me, as my 64GiB boxes are reserved for 1GiB guests and up, and even on the 512MiB and smaller guests, the 32GiB servers rarely exceed 100 guests. Now, if you start more guests, (we started 479) while xl works, xm hangs forever. the domains we start after 338 are unpingable. Xend can not restart. xenconsoled keeps dying. We kill guests down to 300, restart xend and xenconsoled, and everything appears to be happy once again. Anyhow, uh, like I said, it appears to work just fine for 300 guests and below, which is enough for me. I''m guessing that much...

I installed 64-bit xen 3.1.0 (from xensource.com tarballs) on three new machines today, using a configuration setup that I''ve used successfully many times before. However, I encountered a new problem. These are Dell Poweredge 1950 servers, by the way. >From lspci 04:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5708 Gigabit Ethernet (rev 12) 08:00.0 Ethernet

Hello all Here is the scenario: We have a mail server VM which currently has two virtual NICs attached to it. One NIC is has an IP on a subnet with a default gateway defined and the other NIC has an IP on a different subnet with a different gateway on a different VLAN defined. Now when I activate both NICs, and run an ifconfig -a, I see that both IP addresses are showing. Now here is the

Now that x86-64 has directly accessible percpu variables, it can also implement the direct versions of these operations, which operate on a vcpu_info structure directly embedded in the percpu area. In fact, the 64-bit versions are more or less identical, and so can be shared. The only two differences are: 1. xen_restore_fl_direct takes its argument in eax on 32-bit, and rdi on 64-bit.