roucaries bastien wrote: >> >> > Nethertheless I think it is time to report >> > another bug (present without this patch therefore unrelated). >> > Unfortunatly I have no trace because it crash my machine and I do not >> > manage to find it. >> > >> > If I booot my debian guest with framebuffer activated after 20s to 15 >> > minutes I see on my host screen a cloud of colorfull pixel. These >> > pixel flash and seems related to guest frame buffer (same colors >> > scheme but because it not the same resolution I can't read it). About >> > 3s latter my box crash and is dead (cap lock does not even toggles the >> > keyboard led). Therefore it seems that the guest achieve to write the >> > host memory :-(, the good point is that he does not poke to my hard >> > drive registers. >> > >> > This behavior is 100% reproductible. If I run the host and I switch to >> > the text console I can't even get a trace because the screen is >> > corrupted. >> >> >> You can start the guest in vnc mode (-vnc 1), so the host can remain in >> text mode, or use netconsole. > The problem is not switching between x and console but read the oops > because kvm write to video mem :-(. And I do not think netconsole > could help because my computer does not answer to irq, I suspect > something nasty. The only think that could help is nmi watchdog but > unfortunatly the bios declare timer interupt as XT-pic and not io-apic > (bios bug forwaded to asus), therefore no nmi. > > Moreover I try vnc switch and kvm is stable, stange isn't. > > To reproduce: > - use an preempt host kernel on amd64, kvm compiled as x86_64
Which host kernel version are you using? > - install a testing debian on a guest using sdl display, use > framebuffer install (default) Please provide a link to the installer so I can try it too. > - wait.... > - when you see colorfull pixel on the top of your sceen, kill kvm > (kill only accelerate the crash) > - wait 1s > - kernel will crash > > I suspect I am seeing this colorfull pixel because I use a vesa driver > on X and the guest write to it. No, the guest cannot write directly to host memory. It writes to a virtualized framebuffer. -- error compiling committee.c: too many arguments to function ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
