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be422ace19
The function XendDomainInfo:_releaseDevices() is called during the save/destroy phase of a domain. It made some attempt to clean up the devices, but wasn't complete, leaving dangling devices in the xenstore. Not a big problem with normal use of Xen, but a buildup over a large number of save/destroy instances, it would make the xenstore database grow quite large, which in turn meant swap-thrashing in Dom0. This patch makes use of the destroyDevices() function in XendDomainInfo. This function needed some re-writing to make it work correctly - I think it had some old code (not sure how old, as xm annotate says that it's changeset 12071, but that, I think, is when it was split out from XendDomain.py, rather than when it was created). I have tested this over a few hundred save/restore cycles [two domains constantly saved/restored with a short sleep to let them process some work] combined with a loop of "xenstore-ls|wc". The output of the latter is pretty much constant (it obviously varies a bit depending on when in the save/restore cycle it hits). Previously, it would increase by some 10 lines or so per save/restore cycle. Signed-off-by: Mats Petersson <mats.petersson@amd.com>
The file test.py here is from the Zope project, and is Copyright (c) 2001, 2002 Zope Corporation and Contributors. This file is released under the Zope Public License, version 2.0, a copy of which is in the file ZPL-2.0.