RE: [Xen-users] XEN Dom 0 boot and Out of Memory issue

["Ian Tobin" <itobin@xxxxxxxxxxxxx>]

Hi,

 

Glad you sorted it,  you will probably want the dom0_mem=512M anyway because as your domUs start and stop the memory available to dom0 will get lost as it does calculations on startup.  When I switched to using that option my dom0s are much more stable now.

 

Thanks

 

Ian

 

 

From: Tanish Srivastava [mailto:tanish4u@xxxxxxxxxxx]
Sent: 18 May 2011 04:34
To: Ian Tobin; XEN Devel
Subject: RE: [Xen-users] XEN Dom 0 boot and Out of Memory issue

 

Hi,

I fixed the issue by not running the unwanted programs in dom0. Thanks Ian.

Tanish S.

---

Subject: RE: [Xen-users] XEN Dom 0 boot and Out of Memory issue
Date: Tue, 17 May 2011 23:44:13 +0100
From: itobin@xxxxxxxxxxxxx
To: tanish4u@xxxxxxxxxxx; xen-users@xxxxxxxxxxxxxxxxxxx
CC:

Hi,

 

You will most likely need the

 

dom0_mem=512M

 

adding to the grub config.

 

 

I assume your not running excess programs in dom0, if so I wouldn’t  J

 

Ian

From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Tanish Srivastava
Sent: 13 May 2011 04:53
To: XEN Devel
Subject: [Xen-users] XEN Dom 0 boot and Out of Memory issue

 

Hi all,

Recently I build XEN 4.1 (from the xen.org) on centIOS 5.5 (kernel 2.6.38.4). After changing the grub file and rebooting the machine, I am continuously getting out of memory error. The content of my grub file:

default=0
timeout=5
serial --unit=0 --speed=115200
terminal --timeout=10 console serial
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS (2.6.38.4)
        root (hd0,0)
        kernel /vmlinuz-2.6.38.4 ro root=/dev/VolGroup00/LogVol00 rhgb quiet
        initrd /initrd-2.6.38.4.img
title CentOS (2.6.38-xen0)
        root (hd0,0)
        kernel /xen-4.1.0.gz loglvl=all dom0_mem=512m guest_loglvl=all  vga=ask,keep apic_verbosity=debug,verbose rhgb
        module /vmlinuz-2.6.38.4 ro root=/dev/VolGroup00/LogVol00 earlyprintk=xen console=ttyS0 nomodeset
        module /initrd-2.6.38.4.img

The machine boots normally in CenOS (2.6.38.4).
I am also attaching the log of the serial console. A snippet from the log file:

CentOS release 5.5 (Final)
Kernel 2.6.38.4 on an x86_64

xen109.itpl login: Xorg invoked oom-killer: gfp_mask=0x0, order=0, oom_adj=0, oom_score_adj=0
Pid: 2826, comm: Xorg Not tainted 2.6.38.4 #13
Call Trace:
 [<ffffffff810ad565>] ? dump_header+0x7d/0xae
 [<ffffffff810ad911>] ? oom_kill_process+0x46/0x151
 [<ffffffff810adabe>] ? select_bad_process+0xa2/0x110
 [<ffffffff810adc92>] ? out_of_memory+0x166/0x1d0
 [<ffffffff81009029>] ? xen_spin_lock+0xbf/0xd2
 [<ffffffff810add16>] ? pagefault_out_of_memory+0x1a/0x45
 [<ffffffff8142a020>] ? do_page_fault+0x2c9/0x40c
 [<ffffffff8123222c>] ? security_file_permission+0x1c/0x89
 [<ffffffff814271d5>] ? page_fault+0x25/0x30
Mem-Info:
Node 0 DMA per-cpu:
CPU    0: hi:    0, btch:   1 usd:   0
CPU    1: hi:    0, btch:   1 usd:   0
Node 0 DMA32 per-cpu:
CPU    0: hi:  186, btch:  31 usd: 103
CPU    1: hi:  186, btch:  31 usd:  71
Node 0 Normal per-cpu:
CPU    0: hi:  186, btch:  31 usd:   0
CPU    1: hi:  186, btch:  31 usd:   0
active_anon:5831 inactive_anon:2 isolated_anon:0
 active_file:3833 inactive_file:57589 isolated_file:0
 unevictable:1124 dirty:99 writeback:0 unstable:0
 free:283729 slab_reclaimable:4785 slab_unreclaimable:2380
 mapped:3362 shmem:36 pagetables:1029 bounce:0
Node 0 DMA free:12904kB min:32kB low:40kB high:48kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:12712kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 1464 1936 1936
Node 0 DMA32 free:1122012kB min:4240kB low:5300kB high:6360kB active_anon:23324kB inactive_anon:8kB active_file:15332kB inactive_file:230356kB unevictable:4496kB isolated(anon):0kB isolated(file):0kB present:1499360kB mlocked:4496kB dirty:396kB writeback:0kB mapped:13448kB shmem:144kB slab_reclaimable:19140kB slab_unreclaimable:9520kB kernel_stack:984kB pagetables:4116kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 472 472
Node 0 Normal free:0kB min:1368kB low:1708kB high:2052kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:483724kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 0 0
Node 0 DMA: 2*4kB 0*8kB 2*16kB 2*32kB 4*64kB 2*128kB 2*256kB 1*512kB 1*1024kB 1*2048kB 2*4096kB = 12904kB
Node 0 DMA32: 1*4kB 1*8kB 2*16kB 0*32kB 1*64kB 3*128kB 1*256kB 2*512kB 2*1024kB 2*2048kB 272*4096kB = 1122028kB
Node 0 Normal: 0*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 0kB
62219 total pagecache pages
0 pages in swap cache
Swap cache stats: add 0, delete 0, find 0/1
Free swap  = 4063228kB
Total swap = 4063228kB
515808 pages RAM
150843 pages reserved
17268 pages shared
69909 pages non-shared
Out of memory: Kill process 2004 (brcm_iscsiuio) score 1 or sacrifice child
Killed process 2004 (brcm_iscsiuio) total-vm:24576kB, anon-rss:96kB, file-rss:208kB
.
.
.
.
continues...


-regards,
Tanish S.

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