On Nov 8, 2006, at 9:57 AM, Jimi Xenidis wrote:


On Nov 4, 2006, at 12:35 PM, poff wrote:

Here's this patch on JS20, with 192mb Dom0, 512mb total:

Hmm, so a 512MiB machine?

arch_gnttab_map: grant table at d000080082016000
setup_grant_area: mempool_create(): failed
kernel BUG in setup_grant_area at /home/poff/linux-ppc-2.6-work.hg/ arch/powerpc/platforms/xen/gnttab.c:420!
cpu 0x0: Vector: 700 (Program Check) at [c000000000a3fa50]
    pc: c000000000043fc0: .arch_gnttab_map+0x1bc/0x254
    lr: c000000000043fbc: .arch_gnttab_map+0x1b8/0x254
    sp: c000000000a3fcd0
   msr: 8000000000028032
  current = 0xc000000000a31800
  paca    = 0xc00000000052e300
    pid   = 1, comm = swapper
kernel BUG in setup_grant_area at /home/poff/linux-ppc-2.6-work.hg/ arch/powerpc/platforms/xen/gnttab.c:420!
enter ? for help
0:mon>


Hmm, ok.. I wonder why it failed?
I'm such a lazy @ss when I use BUG() all the time, I really did not expect mempool to ever have a memory issue.
I'll see if I can replicate by forcing my dom0 to this size.

Hmm.. I capped my Dom0 to 192M and 64M and it worked fine. The only reason that mempool_create() can fail is if an underlying kmalloc failed, I don't think that we are trying to get so much memory.

Hey! did you update Xen as well? because the number of pages was way too large before.
-JX

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