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Description of problem: Version-Release number of selected component (if applicable): 2.6.32-252.el6.x86_64 qemu-kvm-0.12.1.2-2.248.el6rhev.x86_64 virtio-win-prewhql-23 How reproducible: 100% Steps to Reproduce: 1.start guest with -m 8G 2.(qemu)balloon 1024 3.after step ,(qemu)balloon 8192 Actual results: the speed of evicting memory is 53MB/Sec the speed of enlarging memroy is 700MB/Sec Expected results: the speed of evicting memory and enlaring memory should be same . Additional info:
(In reply to comment #0) > Description of problem: > > > Version-Release number of selected component (if applicable): > 2.6.32-252.el6.x86_64 > qemu-kvm-0.12.1.2-2.248.el6rhev.x86_64 > virtio-win-prewhql-23 > > > How reproducible: > 100% > > Steps to Reproduce: > 1.start guest with -m 8G > 2.(qemu)balloon 1024 > 3.after step ,(qemu)balloon 8192 > > Actual results: > the speed of evicting memory is 53MB/Sec > the speed of enlarging memroy is 700MB/Sec > > Expected results: > the speed of evicting memory and enlaring memory should be same . Let me disagree, allocating memory from and releasing memory to non-paged pool are not equal process in any terms. So you cannot expect both of them to be performed at the same speed. BTW, while allocating (ballon inflating) speed will vary, depending on the balloon size, size of free memory, and system load. Best regards, Vadim. > > > Additional info: