Herbert Poetzl wrote: > On Fri, Dec 07, 2007 at 08:17:06AM +0100, Stephan Mueller wrote: >> Hi, >> >> I managed to setup xorg 7.2 inside of a vguest by adding the device >> nodes tty7, mem and psaux as well as adding the SYS_RAWIO b-capability >> (fllowing the howto in the wiki). >> >> However, the xorg instance inside of the vguest seems to be much slower >> (when moving windows etc.) than one that is running on the host (same >> xorg release, both using debian lenny). >> >> I took a look at both resulting Xorg.logs and the only significant >> difference i can see is that the log from the host conatins lines as >> shown below whereas the vguests log does not have this kind of entries: >> >> (II) PCI: PCI scan (all values are in hex) >> (II) PCI: 00:00:0: chip 1002,7910 card 1458,5000 rev 00 class 06,00,00 hdr 00 >> (II) PCI: 00:01:0: chip 1002,7912 card 0000,0000 rev 00 class 06,04,00 hdr 01 >> (II) PCI: 00:12:0: chip 1002,4380 card 1458,b002 rev 00 class 01,06,01 hdr 00 >> (II) PCI: 00:13:0: chip 1002,4387 card 1458,5004 rev 00 class 0c,03,10 hdr 80 >> (II) PCI: 00:13:1: chip 1002,4388 card 1458,5004 rev 00 class 0c,03,10 hdr 00 >> [...] >> >> This seems to result in the line >> >> (II) Setting vga for screen 0. >> >> which I can not find in the vguest log. >> >> For me this looks like the vguest does not have direct access to the >> graphics card. > > could easily be ... Xorg does quite a number of low > level things (messing with the hardware) > >> Any ideas if and how this could be improved? > > you could, for a start, throw a bunch of capabilities > at the guest and disable (for testing) the proc hiding > >> I would rather prefer running the xorg stuff inside of a vguest >> instead of on the host which is hosting several other vguests. > >> A look at the lsof output for /dev did not reveal any other devices >> used by xorg on the host that are missing on the vguest. > > it could get various device and control nodes/entries > from proc and/or sys .. check for those too (maybe > even strace a simple Xorg startup) > > if you are interested in improving X (hardware access) > inside a guest, please let me know, if a number of folks > show interest and volunteer to test stuff, we could work > on improving X (hardware access) for certain guests I am interested. I will have a system _just_ for testing, hopefully, next week. Rod -- > > best, > Herbert > >> Thanks and cheers, >> >> Steph.