[Xen-devel] unstable grant table issues?

[Gerd Knorr <kraxel@xxxxxxx>]

  Hi,

current unstable (hg22ccddf93c40c7962109d1763d88b9f65af1f680)
fails to boot DomU for me (32-bit, unpatched).  Seems to be a
problem with the grant tables.

Last DomU messages:

  VFS: Mounted root (ext2 filesystem) readonly.
  Freeing unused kernel memory: 168k freed
  attempt to access beyond end of device
  sda1: rw=0, want=1717986920, limit=8388608

The domain is still in the "xm list" after that and can't be
killed by "xm destroy".

In the xen message log I see this (xen built with debug=y):

  [ ... ]
  (XEN) Scrubbing Free RAM: ...........done.
  (XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to 
Xen).
  (XEN) 
(file=/work/bk/xen/test-build-i686-22ccddf93c40c7962109d1763d88b9f65af1f680/xen/include/asm/mm.h,
 line=187) Error pfn 100: rd=ff19d080, od=00000000, caf=00000000, taf=00000000
  (XEN) 
(file=/work/bk/xen/test-build-i686-22ccddf93c40c7962109d1763d88b9f65af1f680/xen/include/asm/mm.h,
 line=187) Error pfn 100: rd=ff19d080, od=00000000, caf=00000000, taf=00000000
  (XEN) 
(file=/work/bk/xen/test-build-i686-22ccddf93c40c7962109d1763d88b9f65af1f680/xen/include/asm/mm.h,
 line=187) Error pfn 100: rd=ff19d080, od=00000000, caf=00000000, taf=00000000
  (XEN) (file=grant_table.c, line=500) Bad handle (0).
  (XEN) (file=grant_table.c, line=500) Bad handle (8192).
  (XEN) (file=grant_table.c, line=500) Bad handle (40264).
  (XEN) (file=grant_table.c, line=500) Bad handle (0).
  (XEN) (file=grant_table.c, line=500) Bad handle (20480).
  (XEN) (file=grant_table.c, line=500) Bad handle (0).

The error messages from mm.h appeared during Dom0 bootup, but seem to be
harmless.  The grant_table.c messages where triggered by the attempt to boot
DomU.

Config file looks like this:

  master-xen root ~# cat /vm/sl93/config.xen3
  # general
  kernel = "/vm/sl93/vmlinuz3";
  memory = 128;
  name = "sl93";
  builder = "linux";

  # disk
  #disk = [ 'file:/dev/xen/sl93,sda1,w' ];
  disk = [ 'phy:xen/sl93,sda1,w' ];
  root = "/dev/sda1 ro";

  # network
  vif = [ 'mac=aa:00:78:65:6e:31, bridge=eth0' ];
  dhcp = "dhcp";

Which of the two "disk = " lines I use doesn't make a difference (Is there any
btw.?).

Any idea?

  Gerd


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