[win-pv-devel] [PATCH 0/4] Fix VIF plug/unplug races

[Paul Durrant <pdurrant@xxxxxxxxx>]

XenServer system test highlighted problems with VIF plug and unplug not
always completing successfully. Several races were then subsequently
exposed by running a script to continuously plug and unplug a vif in
a tight loop.

This series re-works several aspects of the PDO management and
frontend code to fix these races.

Patch #1 fixes a BSOD the could occur if the VIF was unplugged very
quickly after detection by the frontend.

Patch #2 removes excessive function inlining that made debugging tricky

Patch #3 prevents some uninteresting log spew

Patch #4 re-works the frontend state model code and also the way in
which IoRequestDeviceEject() is invoked, to avoid it racing with PDO
destruction due to surprise removal.

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