Hi all, For a long time I am seeing data corruption in guests when using KVM, but I am convinced only since today that the problem comes from KVM.
The symptoms are a few bytes that are mangled to 0x00 in a file that has been written. For now I have only seen 2 or 4 consecutive bytes mangled, but that may due to statistics given the limited samples. The problem appears very rarely. I am only seeing it when doing huge compilations (for example gcc or glibc), and not for every build. Note that I am only detecting build failures, so I can miss some corruptions. Note that I have observed the problem on GNU/Linux, GNU/kFreeBSD and plain FreeBSD, for both 32 and 64-bit guests. I always used 64-bit hosts, and I have seen the problem on both Core 2 and Athlon 64 CPU (always multi-core). I have never seen such corruptions using QEMU, so I would say the problem does not comes from the disk emulation, though it may be due to statistics. Note that I have made a lot of compilation in a MIPS QEMU guest (a few hundred of hours), without any problem. This platform uses the same IDE controller as the one in KVM. Does anybody have seen the same kind of problem? Without a way to reproduce the corruption, I think it will be very difficult to debug the problem. Regards, Aurelien -- .''`. Aurelien Jarno | GPG: 1024D/F1BCDB73 : :' : Debian developer | Electrical Engineer `. `' [EMAIL PROTECTED] | [EMAIL PROTECTED] `- people.debian.org/~aurel32 | www.aurel32.net ------------------------------------------------------------------------- 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
