Cryptic and confusing error message during vboxmanage modifyvm --guestmemoryballoon

[Scott Brickey]

1) when setting guestmemoryballoon size, error messages are cryptic at best (I don't care about the DETAILS or CONTEXT) 2) when setting guestmemoryballoon size, maximum allowed value is rounded, causing confusion.

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Step 1) try setting value of 2048MB

C:\Program Files\Oracle\VirtualBox>vboxmanage modifyvm "Domain Workstation" --guestmemoryballoon 2048 Oracle VM VirtualBox Command Line Management Interface Version 3.2.10 (C) 2005-2010 Oracle Corporation All rights reserved.

ERROR: Invalid memory balloon size: 2048 MB (must be in range [0, 1843] MB) Details: code E_INVALIDARG (0x80070057), component Machine, interface IMachine, callee IUnknown Context: "COMSETTER(MemoryBalloonSize)(ValueUnion.u32)" at line 1714 of file VBo xManageModifyVM.cpp

Ok, Step 2) try setting to stated maximum...

C:\Program Files\Oracle\VirtualBox>vboxmanage modifyvm "Domain Workstation" --guestmemoryballoon 1843 Oracle VM VirtualBox Command Line Management Interface Version 3.2.10 (C) 2005-2010 Oracle Corporation All rights reserved.

ERROR: Invalid memory balloon size: 1843 MB (must be in range [0, 1843] MB) Details: code E_INVALIDARG (0x80070057), component Machine, interface IMachine, callee IUnknown Context: "COMSETTER(MemoryBalloonSize)(ValueUnion.u32)" at line 1714 of file VBo xManageModifyVM.cpp

Ugh. Step 3) try setting just shy of stated maximum (assume rounding to be the cause)

C:\Program Files\Oracle\VirtualBox>vboxmanage modifyvm "Domain Workstation" --guestmemoryballoon 1842 Oracle VM VirtualBox Command Line Management Interface Version 3.2.10 (C) 2005-2010 Oracle Corporation All rights reserved.

C:\Program Files\Oracle\VirtualBox>

SUCCESS (finally)

PS: this feature (along with PageFusion) should be configurable within the UI... either by allowing multiple sliders in the memory page, or with another slider.

[aeichner]

Please reopen if still relevant with a recent VirtualBox release.