>kvm-36 is repeatedly timing out partway through a long network transfor >and failing to resume. Both host and guest are 64-bit. This has happened >with a number of prior releases as well; it does not appear to be a >recently-introduced issue. > >My command line looks like the following: > >$ qemu-system-x86_64 -kernel kernel-x86_64-2.6.20-gentoo-r8 -initrd >initramfs.igz -hda hda -hdb hdb -append "panic=30 console=ttyS0 >action=install" -nographic -net nic -net >'tap,ifname=tap0,script=./tap0-start' > >/dev/kvm is quite certainly being used, as KVM immediately segfaults on >startup without it (or in the presence of the -no-kvm option). > >dmesg on the host shows a great number of "rtc: lost some interrupts at >1024Hz" messages. > >The end of a typical session looks much like the following: > >==== >79000K .......... .......... .......... .......... .......... 4% 5.43M > 4:33 >79050K .......... .......... .......... .......... .......... 4% 6.10M > 4:03 >79100K .......... .......... .......... .......... .......... 4% 8.14M > 3:02 >79150K ...... 4% 5.96M > 4:09 > >02:45:23 (2.06 MB/s) - Read error at byte 81055847/1639127012 >(Connection timed out). Retrying. > >--02:45:23-- >http://10.0.0.30/gentoo-installer/deployed_server-stage4-amd64- >2007.0.tar.bz2 > (try: 2) => `/mnt/gentoo/deployed_server-stage4-amd64-2007.0.tar.bz2' >Connecting to 10.0.0.30:80... Hangcheck: hangcheck value past margin! >failed: Connection timed out. >Retrying. > >--02:45:53-- >http://10.0.0.30/gentoo-installer/deployed_server-stage4-amd64- >2007.0.tar.bz2 > (try: 3) => `/mnt/gentoo/deployed_server-stage4-amd64-2007.0.tar.bz2' >Connecting to 10.0.0.30:80... failed: Connection timed out. >Retrying. > >--02:46:23-- >http://10.0.0.30/gentoo-installer/deployed_server-stage4-amd64- >2007.0.tar.bz2 > (try: 4) => `/mnt/gentoo/deployed_server-stage4-amd64-2007.0.tar.bz2' >==== > >Network access works, and then suddenly doesn't. I am more reliably able >to reproduce this issue using -net tap than -net user. >
Can you try it without rtc (either use -no-rtc, I'm not sure we have this flag or just rm /dev/rtc before you run the vm). What's your host HZ configuration? If the above doesn't work, can you repeat the test with -no-kvm? ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
