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SubjectRe: [rfc][patch 2/2] x86_64: FIFO ticket spinlocks

* Nick Piggin <> wrote:

> [...] trylock is more significantly slower, but they are relatively
> rare.

trylock is the main thing that the spinlock debugging code uses, and
SPINLOCK_DEBUG is frequently enabled by distro kernels. OTOH, the cost
looks like to be +5 instructions, right? Still ...

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