RuoMu Hu
2008-Oct-21 09:26 UTC
[Xen-users] RHEL5 2.6.18-53.12 IA64 xen kernel memory allocation problem
Hi!
I''m running RHEL5 2.6.18-53.1.21 xen IA64 kernel on an IA64 machine
with 8GB
memory . I can only allocate about 400M memory to dom0. Then I applied
this patch to the kernel:
http://lists.xensource.com/archives/html/xen-ia64-devel/2007-07/msg00274.html.
Now the kernel can only recognize about 4GB memory. Now, for the patched
kernel:
After reboot, before "xm mem-set Domain 0 8192" and "xm mem-max
Domain-0
8192",
"xm list -l" shows:
(domain
(domid 0)
(uuid 00000000-0000-0000-0000-000000000000)
(vcpus 1)
(cpu_weight 1.0)
(memory 4019)
(shadow_memory 0)
(maxmem 4019)
(features )
(name Domain-0)
(on_poweroff destroy)
(on_reboot restart)
(on_crash restart)
(state r-----)
(shutdown_reason poweroff)
(cpu_time 33.772744786)
(online_vcpus 4)
)
"xm info" shows:
release : 2.6.18-53.1.21xen
version : #1 SMP Mon Oct 20 04:05:54 EDT 2008
machine : ia64
nr_cpus : 16
nr_nodes : 1
sockets_per_node : 4
cores_per_socket : 2
threads_per_core : 2
cpu_mhz : 1668
hw_caps :
00000000:00000000:00000000:00000000:00000000:00000000:00000000:00000000:
total_memory : 8034
free_memory : 3928
xen_major : 3
xen_minor : 1
xen_extra : .0-53.12
xen_caps : xen-3.0-ia64 xen-3.0-ia64be hvm-3.0-ia64
xen_pagesize : 16384
platform_params : virt_start=0xe800000000000000
xen_changeset : unavailable
cc_compiler : gcc version 4.1.2 20070626 (4.1.2-14)
cc_compile_by : root
cc_compile_domain : abc.net
cc_compile_date : Mon Oct 20 03:25:33 EDT 2008
xend_config_format : 2
"free" shows:
total used free shared buffers cached
Mem: 4115456 660816 3454640 0 26656 208832
-/+ buffers/cache: 425328 3690128
Swap: 2040208 0 2040208
After "xm mem-set Domain 0 8192" and "xm mem-max Domain-0
8192",
"xm list -l" shows:
(domain
(domid 0)
(uuid 00000000-0000-0000-0000-000000000000)
(vcpus 1)
(cpu_weight 1.0)
(memory 8192)
(shadow_memory 0)
(maxmem 8192)
(features )
(name Domain-0)
(on_poweroff destroy)
(on_reboot restart)
(on_crash restart)
(state r-----)
(shutdown_reason poweroff)
(cpu_time 42.167766076)
(online_vcpus 4)
)
"xm info" shows:
The same as before.
"free" shows:
total used free shared buffers cached
Mem: 4133888 661248 3472640 0 26736 209376
-/+ buffers/cache: 425136 3708752
Swap: 2040208 0 2040208
I want Dom0 to use all 8GB memory. Any ideas?
Thanks!
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Isaku Yamahata
2008-Oct-21 09:57 UTC
Re: [Xen-ia64-devel] RHEL5 2.6.18-53.12 IA64 xen kernel memory allocation problem
On Tue, Oct 21, 2008 at 05:26:30PM +0800, RuoMu Hu wrote:> Hi! > > I''m running RHEL5 2.6.18-53.1.21 xen IA64 kernel on an IA64 machine with 8GB > memory . I can only allocate about 400M memory to dom0. Then I applied this > patch to the kernel: http://lists.xensource.com/archives/html/xen-ia64-devel/ > 2007-07/msg00274.html. Now the kernel can only recognize about 4GB memory. > Now, for the patched kernel:Hi. Does it help to add dom0_mem=<memori size> to xen boot command line? At this moment, domain''s memory can''t be increased beyond the size which is allocated at boot time. The memory should be allocated from the time when the domain is created. (In your case, 4GB is assigned to dom0 at the boot time, so you can''t increase memory beyond 4GB. If you want to use 8GB for dom0, 8GB must be assigned from the boot time.) Probably it would help to post your boot log which includes xen and dom0 kernel. thanks,> > After reboot, before "xm mem-set Domain 0 8192" and "xm mem-max Domain-0 8192", > > "xm list -l" shows: > > (domain > (domid 0) > (uuid 00000000-0000-0000-0000-000000000000) > (vcpus 1) > (cpu_weight 1.0) > (memory 4019) > (shadow_memory 0) > (maxmem 4019) > (features ) > (name Domain-0) > (on_poweroff destroy) > (on_reboot restart) > (on_crash restart) > (state r-----) > (shutdown_reason poweroff) > (cpu_time 33.772744786) > (online_vcpus 4) > ) > > "xm info" shows: > > release : 2.6.18-53.1.21xen > version : #1 SMP Mon Oct 20 04:05:54 EDT 2008 > machine : ia64 > nr_cpus : 16 > nr_nodes : 1 > sockets_per_node : 4 > cores_per_socket : 2 > threads_per_core : 2 > cpu_mhz : 1668 > hw_caps : > 00000000:00000000:00000000:00000000:00000000:00000000:00000000:00000000: > total_memory : 8034 > free_memory : 3928 > xen_major : 3 > xen_minor : 1 > xen_extra : .0-53.12 > xen_caps : xen-3.0-ia64 xen-3.0-ia64be hvm-3.0-ia64 > xen_pagesize : 16384 > platform_params : virt_start=0xe800000000000000 > xen_changeset : unavailable > cc_compiler : gcc version 4.1.2 20070626 (4.1.2-14) > cc_compile_by : root > cc_compile_domain : abc.net > cc_compile_date : Mon Oct 20 03:25:33 EDT 2008 > xend_config_format : 2 > > "free" shows: > > total used free shared buffers cached > Mem: 4115456 660816 3454640 0 26656 208832 > -/+ buffers/cache: 425328 3690128 > Swap: 2040208 0 2040208 > > After "xm mem-set Domain 0 8192" and "xm mem-max Domain-0 8192", > > "xm list -l" shows: > > (domain > (domid 0) > (uuid 00000000-0000-0000-0000-000000000000) > (vcpus 1) > (cpu_weight 1.0) > (memory 8192) > (shadow_memory 0) > (maxmem 8192) > (features ) > (name Domain-0) > (on_poweroff destroy) > (on_reboot restart) > (on_crash restart) > (state r-----) > (shutdown_reason poweroff) > (cpu_time 42.167766076) > (online_vcpus 4) > ) > > "xm info" shows: > > The same as before. > > "free" shows: > > total used free shared buffers cached > Mem: 4133888 661248 3472640 0 26736 209376 > -/+ buffers/cache: 425136 3708752 > Swap: 2040208 0 2040208 > > > I want Dom0 to use all 8GB memory. Any ideas? > > Thanks!> _______________________________________________ > Xen-ia64-devel mailing list > Xen-ia64-devel@lists.xensource.com > http://lists.xensource.com/xen-ia64-devel-- yamahata _______________________________________________ Xen-ia64-devel mailing list Xen-ia64-devel@lists.xensource.com http://lists.xensource.com/xen-ia64-devel