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Resilient Queued Spin Lock#8599

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kernel-patches-daemon-bpf[bot] wants to merge 25 commits intobpf-next_basekernel-patches/bpf:bpf-next_basefrom series/922967=>bpf-nextkernel-patches/bpf:series/922967=>bpf-nextCopy head branch name to clipboard

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Commits on Mar 12, 2025

• locking: Move MCS struct definition to public header

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• locking: Move common qspinlock helpers to a private header

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• locking: Allow obtaining result of arch_mcs_spin_lock_contended

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• locking: Copy out qspinlock.c to rqspinlock.c

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• rqspinlock: Add rqspinlock.h header

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• rqspinlock: Drop PV and virtualization support

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• rqspinlock: Add support for timeouts

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• rqspinlock: Hardcode cond_acquire loops for arm64

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• rqspinlock: Protect pending bit owners from stalls

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• rqspinlock: Protect waiters in queue from stalls

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• rqspinlock: Protect waiters in trylock fallback from stalls

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• rqspinlock: Add deadlock detection and recovery

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• rqspinlock: Add a test-and-set fallback

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• rqspinlock: Add basic support for CONFIG_PARAVIRT

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• rqspinlock: Add helper to print a splat on timeout or deadlock

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• rqspinlock: Add macros for rqspinlock usage

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• rqspinlock: Add locktorture support

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• rqspinlock: Add entry to Makefile, MAINTAINERS

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• bpf: Convert hashtab.c to rqspinlock

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• bpf: Convert percpu_freelist.c to rqspinlock

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• bpf: Convert lpm_trie.c to rqspinlock

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• bpf: Introduce rqspinlock kfuncs

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• bpf: Implement verifier support for rqspinlock

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• bpf: Maintain FIFO property for rqspinlock unlock

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• selftests/bpf: Add tests for rqspinlock

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