[Xen-devel] Re: Failure booting domU with < 24M

[Jacob Gorm Hansen <jacobg@xxxxxxx>]

On 11/3/05, Jacob Gorm Hansen <jacobg@xxxxxxx> wrote:
> hi,
>
> with unstable from yesterday, linux seems to have trouble detecting
> how much memory to use, i.e. it detects 24M even if only given 16M by
> the domain builder, and then it dies trying to allocate it:

The problem seems to be the 8M(!) slack introduced with this patch.

# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID 41489189b19e20b3fda4222e1787821d990206bc
# Parent  c08e7f0b1ee597381d8c0dcca8a1b915b31bbc96
Add slack to balloon driver to allow to counteract low-mem
address space allocations in backend drivers.
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>

Could the 8M slack be made optional somehow? I like being able to have
16M domains...

Jacob

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