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Ticket to a tarpit
*One Line Summary
Ticket spinlocks have surprisingly bad behaviour in a VM
Abstract
Ticket spinlocks have some very nice properties – in particular guaranteed FIFO ordering in the face of hardware cache-coherency protocol madness.
But those very properties have a dark side in virtual environments, and some kind of paravirtualization is a must.
Tags
Virtualization, kernel, spinlocks, paravirtualization
Speaker
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Biography
I’ve been hacking on Linux since pre-1.0 and Xen for the last couple of years.