Re: [Xen-devel] [PATCH][XM-TEST] Test that tries to create a 16MB domain

[Dan Smith <danms@xxxxxxxxxx>]

JH> I routinely create 4M domains (and I would be able to create them
JH> even smaller if the domain builder would allow it), there is event
JH> a recent Xen paper that mentions running ttylinux in this amout of
JH> space.

But not with a 4M ramdisk, I'm guessing, which is what xm-test uses :)

JH> I think this is a problem in XenLinux, it was discussed recently,
JH> and that you can 'fix' it by setting mem=16M on the linux command
JH> line.

This may be true, however, I am unable to start a 16MB domain with
extra="mem=16M" on x86_64 (x86_32 works).  The domain hangs when
trying to unpack the ramdisk.  I'll submit a patch that adds the
mem=16M argument to the kernel command line so that it will pass on 32
bit.

If there's something different about x86_64 that limits the minimum
size of a domain, then I re-argue for some sort of arch-specific soft
limit to "help" the user realize that they are doing something that is
likely to fail.

-- 
Dan Smith
IBM Linux Technology Center
Open Hypervisor Team
email: danms@xxxxxxxxxx


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