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Commit 0944534e authored by Nicholas Piggin's avatar Nicholas Piggin Committed by Michael Ellerman
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powerpc/qspinlock: theft prevention to control latency



Give the queue head the ability to stop stealers. After a number of
spins without successfully acquiring the lock, the queue head sets
this, which halts stealing and will assure it is the next owner.

Signed-off-by: default avatarNicholas Piggin <npiggin@gmail.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221126095932.1234527-6-npiggin@gmail.com
parent 6aa42f88
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