On Friday 20 October 2006 11:59, [EMAIL PROTECTED] wrote: > Hi, > > I'm trying to run a x86_64 host system with a 32bit and/or a 64bit guest > system. > > Whilst applying the uml kernel patch -bb1 for the 2.6.18 kernel, I get the > following messages: You are applying -bb1 against 2.6.18.1 I guess, where I sent the most important parts of -bb1.
> [EMAIL PROTECTED]:~# /home/test/vmlinux-2.6.18.1-64 > ubd0=/home/test/Debian-3.1-AMD64-root_fs mem=64M con0=fd:0,fd:1 Checking > that ptrace can change system call numbers...OK > Checking syscall emulation patch for ptrace...missing > Checking for tmpfs mount on /dev/shm...OK > Checking PROT_EXEC mmap in /dev/shm/...OK > Checking for the skas3 patch in the host: > - /proc/mm...found > - PTRACE_FAULTINFO...not found > - PTRACE_LDT...found > UML running in SKAS0 mode > <- > > I tried the same with the kernels on Paolo's website, but I did not succeed > in starting a 64bit instance on a 64bit host in skas3 mode. > My 32bit guest > kernels won't start on the 64bit host, either. > Could someone clarify the status of UML and SKAS3 on 64 bit hosts? > > - Is it possible to run 32 bit guests on 64 bit hosts - in skas3? in skas0? > how? In SKAS0 - yes. In half-SKAS3 - install SKAS-V9-pre (not V8) and pass noprocmm to UML (otherwise it will crash). It will get the most part but not all SKAS3 performance advantages. > - Is it possible to run 64 bit guests on 64 bit hosts - in skas3? Only in SKAS0 mode. Must pass skas0; if you forget that, on a vanilla host they'll work ok, on a SKAS-patched one they'll hang. > - If a 64bit guest won't run in skas3, how much of a performance penalty do > you expect in running skas0 with a noptracefaultinfo set? SKAS0 (skas0, or mode=skas0) excludes everything (i.e. it's noprocmm noptraceldt noptracefaultinfo). Hard to measure actually, but it's a not an excessive amount. > I tried to search the list for this information, but there was no > sufficient answer to me, sorry if this request is redundant in any kind. Argh, this question is a real FAQ, I should add it to my web-site. -- Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!". Paolo Giarrusso, aka Blaisorblade http://www.user-mode-linux.org/~blaisorblade Chiacchiera con i tuoi amici in tempo reale! http://it.yahoo.com/mail_it/foot/*http://it.messenger.yahoo.com ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ User-mode-linux-user mailing list User-mode-linux-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
