Hi all, I'm testing nbd. I have a computer with debian squeeze (kernel 2.6.32) and another computer with kubuntu 11.04 (kernel 2.6.38). (pc1) They run nbd-server (2.9.16). They are exporting a raw file of 1G. (pc2)
On a laptop I'm running debian squeeze and nbd-client. (pc3) I conncet nbd0 to pc1 and nbd1 to pc2. On my laptop I run a virtual machine (kvm) that uses nbd0 and nbd1 as its devices. The virtual machin has a third device that is just a another debian sqeeze that is using the two other device to create a raid1 (md0). Well, if I disconnect nbd0 on the host nbd-client -d, on the guest the disk get signe as failed the first time you try to write something. And that is good! If I unplug the ehternet cable from pc1, the guest is like frozen, the kvm process goes 100% cpu, and the nbd device never fail. Only disconneting manualy the device on the host, drive back to normal situation: disk in failure, kvm process using normal amount of cpu. Off course I tryed to add timeout=3 to nbd-client on the host but...nothing change: the device nbd0 and the relative nbd-client processes stay there till ever (or almost), sure not 3 seconds. On the host nbd-client timeout=20 192.168.5.2 2000 /dev/nbd1 WARNING: old-style command-line argument encountered. This is deprecated. Negotiation: ..size = 1048576KB bs=1024, sz=1048576 Why do I get a warning? Why timeout is not working with recent kernels? Note: I also tryed to compile the latest nbd version on pc1...nothing changed. You can test this just with a simple and single nbd exported device. Try fdisk -l /dev/nbd0 before unplugging the cable. Try the same after you unplug the cable and wait the timeout. Replug the cable, fdik will work again!!!! ------------------------------------------------------------------------------ 5 Ways to Improve & Secure Unified Communications Unified Communications promises greater efficiencies for business. UC can improve internal communications as well as offer faster, more efficient ways to interact with customers and streamline customer service. Learn more! http://www.accelacomm.com/jaw/sfnl/114/51426253/ _______________________________________________ Nbd-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/nbd-general
