[Xen-bugs] [Bug 240] New: Ballooning domain to 15MB crashes hard on x86_64

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http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=240

           Summary: Ballooning domain to 15MB crashes hard on x86_64
           Product: Xen
           Version: unstable
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Guest-OS
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: danms@xxxxxxxxxx


[ -- /proc/cpuinfo -- ]

processor       : 0
vendor_id       : GenuineIntel
cpu family      : 15
model           : 4
model name      :                   Intel(R) Xeon(TM) CPU 3.60GHz
stepping        : 1
cpu MHz         : 3600.312
cache size      : 1024 KB
fpu             : yes
fpu_exception   : yes
cpuid level     : 5
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm constant_tsc
pni monitor ds_cpl est tm2 cid cx16 xtpr
bogomips        : 7182.74
clflush size    : 64
cache_alignment : 128
address sizes   : 36 bits physical, 48 bits virtual
power management:

[ -- xm info snippet -- ]

xen_changeset: Mon Sep 19 06:06:05 2005 619e3d6f01b39042f287880572f0f0d92ac799
cc_compiler  : gcc version 4.0.0 20050405 (Red Hat 4.0.0-0.40)

[ -- Reproduction of the problem -- ]

[root@bl2-10 xm-test]# xm mem-set dan

[root@bl2-10:/tmp/xm-test console dan
oom-killer: gfp_mask=0xd2
DMA per-cpu:
cpu 0 hot: low 14, high 42, batch 7
cpu 0 cold: low 0, high 14, batch 7
Normal per-cpu: empty
HighMem per-cpu: empty

Free pages:        1068kB (0kB HighMem)
Active:559 inactive:486 dirty:0 writeback:0 unstable:0 free:267 slab:383
mapped:128 pagetables:6
DMA free:1068kB min:1024kB low:1280kB high:1536kB active:2236kB inactive:1944kB
present:65536kB pages_scanned:420 all_unreclaimable? no
lowmem_reserve[]: 0 0 0
Normal free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB
pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 0
HighMem free:0kB min:128kB low:160kB high:192kB active:0kB inactive:0kB
present:0kB pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 0
DMA: 11*4kB 2*8kB 1*16kB 1*32kB 1*64kB 1*128kB 1*256kB 1*512kB 0*1024kB 0*2048kB
0*4096kB = 1068kB
Normal: empty
HighMem: empty
Swap cache: add 0, delete 0, find 0/0, race 0+0
Free swap  = 0kB
Total swap = 0kB
Out of Memory: Killed process 64 (sh).

[ -- The above repeats indefinitely -- ]

The domU is the very small ramdisk available in xm-test.  On x86_32, it can
easily be ballooned down to 8MB.

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