[Xen-devel] strange error when creating domain with memory=256 and maxmem=1024

[Vasiliy Tolstov <v.tolstov@xxxxxxxxx>]

After some playing with xen (4.1.3) a found strange error, that not
present in xen 4.0.
When i'm try to create domain with memory=256 and maxmem=1024 domain
not created and xl dmesg says:
(XEN) page_alloc.c:1171:d154 Over-allocation for domain 154: 65793 > 65792
(XEN) memory.c:133:d154 Could not allocate order=0 extent: id=154
memflags=0 (0 of 512)

On older version of xen (4.0) i can successeful creat this domain
without errors. Why it happen?
xen10:~ # xl info
host                   : xen10
release                : 3.6.9-1-xen
version                : #1 SMP Tue Dec 4 09:03:58 UTC 2012 (4bde66d)
machine                : x86_64
nr_cpus                : 16
nr_nodes               : 2
cores_per_socket       : 4
threads_per_core       : 2
cpu_mhz                : 2266
hw_caps                :
bfebfbff:28100800:00000000:00003b40:009ce3bd:00000000:00000001:00000000
virt_caps              : hvm hvm_directio
total_memory           : 65527
free_memory            : 49884
free_cpus              : 0
xen_major              : 4
xen_minor              : 1
xen_extra              : .3_04-0.5.1
xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32
hvm-3.0-x86_32p hvm-3.0-x86_64
xen_scheduler          : credit
xen_pagesize           : 4096
platform_params        : virt_start=0xffff800000000000
xen_changeset          : 23336
xen_commandline        : loglvl=all guest_loglvl=all console_to_ring
console=vga dom0_mem=5120M dom0_vcpus_pin vga=current
cc_compiler            : gcc version 4.3.4 [gcc-4_3-branch revision
152973] (SUSE Linux)
cc_compile_by          : abuild
cc_compile_domain      :
cc_compile_date        : Fri Nov  2 12:09:37 UTC 2012
xend_config_format     : 4


--
Vasiliy Tolstov,
Clodo.ru
e-mail: v.tolstov@xxxxxxxxx
jabber: vase@xxxxxxxxx

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