sh_remove_all_mappings() will walk roughly half of the shadow L1 tables
for each MFN it's called with; calling it for every MFN in a guest's
framebuffer can be _very_ expensive, especially with the shadow lock
held across the whole operation. Avoid that by just blowing away all
the shadows.
Signed-off-by: Tim Deegan <Tim.Deegan@xxxxxxxxxx>
dirty-vram-timing
Description: Text document
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