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1 Replies Last post: Feb 11, 2009 3:37 AM by paul_xtravirt  

What is "zero MPN swap candidate" ? posted: Feb 11, 2009 2:42 AM

Click to view brogio's profile Novice
brogio
3 posts since
Jun 22, 2005

Today, while SVmotioning a VM:

(...)

Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=0
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=1
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=2
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=3
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=4
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=5
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=6
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=7
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=8
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=9
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=10
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=11
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=12
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=13
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=14
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=15
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=16
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=17
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=18
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=19
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=20
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=21
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=22
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=23
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=24
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=25
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=26
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=27
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=28
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=29
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=30
Feb 11 10:16:23 vmwareesx3 vmkernel: 4:22:36:55.422 cpu7:1861)Alloc: 13638: vm 1861: zero MPN swap candidate: mpn=0x401da, count=31

(...)

The Vm was correctly migrated.


Tags: 3.5, esx35, vmotion, storage_vmotion

Re: What is "zero MPN swap candidate" ?

1. Feb 11, 2009 3:37 AM in response to: brogio
Click to view paul_xtravirt's profile Hot Shot
paul_xtravirt
162 posts since
Feb 16, 2007
MPN refers to "Machine Page Numbers" and is to do with Memory Resource Management. I would guess that you received a zero candidate message as nothing in memory needed to be remapped (e.g. moved).






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