http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1558
Summary: Dom0 out of memory when mem-set its memory to 512M with
8G physical memory
Product: Xen
Version: unstable
Platform: Other
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P1
Component: Hypervisor
AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
ReportedBy: jiajun.xu@xxxxxxxxx
Environment:
------------
Service Arch (ia32/ia32e/IA64): ia32/ia32e
Guest Arch (ia32/ia32e/IA64):
Guest OS Type (Linux/Windows):
Change Set: Xen-4.0.0-rc1 (20790)
Hardware: Stoakley
Other:
xen-changeset: 20790:0e3910f1de64
pvops git:
commit 60e0545e9649b08dd8ef5f2b991930049c40537e
Merge: b5624ab... 444c982...
Author: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
ioemu git:
commit 3b531c2504c093ce716192e2abd410b418ae915a
Author: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Date: Fri Jan 8 17:57:10 2010 +0000
Bug detailed description:
--------------------------
In Xen-4.0.0-rc1, when setting Dom0 memory to a relatively small value with
mem-set command, Dom0 will be out-of-memory very soon. On my Stoakley, it has
8G memory totally. When setting its memory to 512M, the issue will raise. And
it's a generic issue which also exists on other platform.
My steps:
[root@vt-dp6 ~]$ xm li
Name ID Mem VCPUs State Time(s)
Domain-0 0 7944 8 r----- 430.0
[root@vt-dp6 ~]$ xm mem-set 0 512
[root@vt-dp6 ~]$ xm li
Name ID Mem VCPUs State Time(s)
Domain-0 0 512 8 r----- 434.1
[root@vt-dp6 ~]$ xm info
host : vt-dp6
release : 2.6.31.6
version : #1 SMP Tue Jan 12 16:16:32 CST 2010
machine : x86_64
nr_cpus : 8
nr_nodes : 1
cores_per_socket : 4
threads_per_core : 1
cpu_mhz : 2800
hw_caps :
bfebfbff:20100800:00000000:00000940:0004e3bd:00000000:00000001:00000000
virt_caps : hvm hvm_directio
total_memory : 8164
free_memory : 6728
node_to_cpu : node0:0-7
node_to_memory : node0:6728
node_to_dma32_mem : node0:3131
xen_major : 4
xen_minor : 0
xen_extra : .0-rc1
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 : Tue Jan 12 07:17:40 2010 +0000 20790:0e3910f1de64
xen_commandline : console=com1,vga console=com1 com1=115200,8n1
loglvl=all guest_loglvl=all iommu=1 msi=1 iommu_inclusive_mapping=1
cc_compiler : gcc version 4.1.2 20080704 (Red Hat 4.1.2-44)
cc_compile_by : build
cc_compile_domain : sh.intel.com
cc_compile_date : Tue Jan 12 16:03:51 CST 2010
xend_config_format : 4
Dom0 Dmesg Log:
##############
[ 244.951161] mixer_applet2 invoked oom-killer: gfp_mask=0x200da, order=0,
oomkilladj=0
[ 244.951183] Pid: 5112, comm: mixer_applet2 Not tainted 2.6.31.6 #1
[ 244.951188] Call Trace:
[ 244.951199] [<ffffffff810a20ea>] ? cpuset_print_task_mems_allowed+0x8d/0x98
[ 244.951207] [<ffffffff810ce4fe>] oom_kill_process+0x88/0x21d
[ 244.951214] [<ffffffff810a10e2>] ? cpuset_mems_allowed_intersects+0x1c/0x1e
[ 244.951221] [<ffffffff810ce8cc>] ? badness+0x18f/0x1d3
[ 244.951226] [<ffffffff810ce94f>] __out_of_memory+0x3f/0x151
[ 244.951232] [<ffffffff810ceacf>] out_of_memory+0x6e/0xa5
[ 244.951238] [<ffffffff810d0f98>] __alloc_pages_nodemask+0x454/0x53c
[ 244.951246] [<ffffffff810eca2d>] read_swap_cache_async+0x48/0xe4
[ 244.951252] [<ffffffff810ecb21>] swapin_readahead+0x58/0x97
[ 244.951260] [<ffffffff810cbdb1>] ? find_get_page+0x1d/0x64
[ 244.951295] [<ffffffff810e1bb9>] handle_mm_fault+0x318/0x608
[ 244.951303] [<ffffffff81528f51>] do_page_fault+0x205/0x271
[ 244.951309] [<ffffffff81526f95>] page_fault+0x25/0x30
[ 244.951316] DMA per-cpu:
[ 244.951320] CPU 0: hi: 0, btch: 1 usd: 0
[ 244.951324] CPU 1: hi: 0, btch: 1 usd: 0
[ 244.951328] CPU 2: hi: 0, btch: 1 usd: 0
[ 244.951332] CPU 3: hi: 0, btch: 1 usd: 0
[ 244.951336] CPU 4: hi: 0, btch: 1 usd: 0
[ 244.951340] CPU 5: hi: 0, btch: 1 usd: 0
[ 244.951344] CPU 6: hi: 0, btch: 1 usd: 0
[ 244.951348] CPU 7: hi: 0, btch: 1 usd: 0
[ 244.951352] DMA32 per-cpu:
[ 244.951355] CPU 0: hi: 186, btch: 31 usd: 0
[ 244.951359] CPU 1: hi: 186, btch: 31 usd: 1
[ 244.951363] CPU 2: hi: 186, btch: 31 usd: 30
[ 244.951367] CPU 3: hi: 186, btch: 31 usd: 0
[ 244.951372] CPU 4: hi: 186, btch: 31 usd: 0
[ 244.951376] CPU 5: hi: 186, btch: 31 usd: 1
[ 244.951380] CPU 6: hi: 186, btch: 31 usd: 2
[ 244.951384] CPU 7: hi: 186, btch: 31 usd: 0
[ 244.951387] Normal per-cpu:
[ 244.951391] CPU 0: hi: 186, btch: 31 usd: 180
[ 244.951395] CPU 1: hi: 186, btch: 31 usd: 155
[ 244.951399] CPU 2: hi: 186, btch: 31 usd: 174
[ 244.951403] CPU 3: hi: 186, btch: 31 usd: 72
[ 244.951407] CPU 4: hi: 186, btch: 31 usd: 29
[ 244.951411] CPU 5: hi: 186, btch: 31 usd: 110
[ 244.951415] CPU 6: hi: 186, btch: 31 usd: 142
[ 244.951419] CPU 7: hi: 186, btch: 31 usd: 46
[ 244.951425] Active_anon:35 active_file:28 inactive_anon:12
[ 244.951426] inactive_file:33 unevictable:0 dirty:0 writeback:71 unstable:0
[ 244.951427] free:8845 slab:4530 mapped:70 pagetables:3238 bounce:0
[ 244.951438] DMA free:9356kB min:12kB low:12kB high:16kB active_anon:0kB
inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB
present:9136kB pages_scanned:0 all_unreclaimable? yes
[ 244.951446] lowmem_reserve[]: 0 3255 7055 7055
[ 244.951457] DMA32 free:20052kB min:4956kB low:6192kB high:7432kB
active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB
unevictable:0kB present:3333344kB pages_scanned:0 all_unreclaimable? yes
[ 244.951466] lowmem_reserve[]: 0 0 3800 3800
[ 244.951477] Normal free:5972kB min:5784kB low:7228kB high:8676kB
active_anon:140kB inactive_anon:48kB active_file:112kB inactive_file:132kB
unevictable:0kB present:3891220kB pages_scanned:704 all_unreclaimable? yes
[ 244.951486] lowmem_reserve[]: 0 0 0 0
[ 244.951494] DMA: 3*4kB 2*8kB 3*16kB 4*32kB 3*64kB 2*128kB 0*256kB 1*512kB
0*1024kB 0*2048kB 2*4096kB = 9356kB
[ 244.951514] DMA32: 7*4kB 5*8kB 5*16kB 8*32kB 7*64kB 4*128kB 3*256kB 3*512kB
4*1024kB 6*2048kB 0*4096kB = 20052kB
[ 244.951534] Normal: 496*4kB 2*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB
0*512kB 0*1024kB 0*2048kB 1*4096kB = 6096kB
[ 244.951553] 199 total pagecache pages
[ 244.951557] 81 pages in swap cache
[ 244.951560] Swap cache stats: add 28150, delete 28069, find 505/978
[ 244.951565] Free swap = 1950840kB
[ 244.951568] Total swap = 2048276kB
[ 244.987830] Out of memory: kill process 5071 (xend) score 19193 or a child
[ 244.987867] Killed process 5072 (xend)
[ 245.413250] gam_server invoked oom-killer: gfp_mask=0x200da, order=0,
oomkilladj=0
[ 245.413270] Pid: 4941, comm: gam_server Not tainted 2.6.31.6 #1
[ 245.413279] Call Trace:
[ 245.413291] [<ffffffff810a20ea>] ? cpuset_print_task_mems_allowed+0x8d/0x98
[ 245.413299] [<ffffffff810ce4fe>] oom_kill_process+0x88/0x21d
[ 245.413307] [<ffffffff810a10e2>] ? cpuset_mems_allowed_intersects+0x1c/0x1e
[ 245.413313] [<ffffffff810ce8cc>] ? badness+0x18f/0x1d3
[ 245.413320] [<ffffffff810ce94f>] __out_of_memory+0x3f/0x151
[ 245.413325] [<ffffffff810ceacf>] out_of_memory+0x6e/0xa5
[ 245.413331] [<ffffffff810d0f98>] __alloc_pages_nodemask+0x454/0x53c
[ 245.413339] [<ffffffff810eca2d>] read_swap_cache_async+0x48/0xe4
[ 245.413345] [<ffffffff810ecb21>] swapin_readahead+0x58/0x97
[ 245.413352] [<ffffffff810cbdb1>] ? find_get_page+0x1d/0x64
[ 245.413380] [<ffffffff810e1bb9>] handle_mm_fault+0x318/0x608
[ 245.413388] [<ffffffff81528f51>] do_page_fault+0x205/0x271
[ 245.413393] [<ffffffff81526f95>] page_fault+0x25/0x30
.......
###########
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