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3163369407
Test the basic functionality for the NUMA and MPOL flags: - FUTEX2_NUMA should take the NUMA node which is after the uaddr and use it. - Only update the node if FUTEX_NO_NODE was set by the user - FUTEX2_MPOL should use the memory based on the policy. I attempted to set the node with mbind() and then use this with MPOL but this fails and futex falls back to the default node for the current CPU. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20250416162921.513656-22-bigeasy@linutronix.de
93 lines
1.9 KiB
C
93 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Futex2 library addons for futex tests
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*
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* Copyright 2021 Collabora Ltd.
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*/
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#include <stdint.h>
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#define u64_to_ptr(x) ((void *)(uintptr_t)(x))
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#ifndef __NR_futex_waitv
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#define __NR_futex_waitv 449
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struct futex_waitv {
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__u64 val;
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__u64 uaddr;
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__u32 flags;
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__u32 __reserved;
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};
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#endif
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#ifndef __NR_futex_wake
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#define __NR_futex_wake 454
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#endif
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#ifndef __NR_futex_wait
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#define __NR_futex_wait 455
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#endif
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#ifndef FUTEX2_SIZE_U32
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#define FUTEX2_SIZE_U32 0x02
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#endif
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#ifndef FUTEX2_NUMA
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#define FUTEX2_NUMA 0x04
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#endif
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#ifndef FUTEX2_MPOL
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#define FUTEX2_MPOL 0x08
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#endif
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#ifndef FUTEX2_PRIVATE
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#define FUTEX2_PRIVATE FUTEX_PRIVATE_FLAG
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#endif
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#ifndef FUTEX2_NO_NODE
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#define FUTEX_NO_NODE (-1)
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#endif
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#ifndef FUTEX_32
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#define FUTEX_32 FUTEX2_SIZE_U32
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#endif
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struct futex32_numa {
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futex_t futex;
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futex_t numa;
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};
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/**
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* futex_waitv - Wait at multiple futexes, wake on any
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* @waiters: Array of waiters
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* @nr_waiters: Length of waiters array
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* @flags: Operation flags
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* @timo: Optional timeout for operation
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*/
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static inline int futex_waitv(volatile struct futex_waitv *waiters, unsigned long nr_waiters,
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unsigned long flags, struct timespec *timo, clockid_t clockid)
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{
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return syscall(__NR_futex_waitv, waiters, nr_waiters, flags, timo, clockid);
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}
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/*
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* futex_wait() - block on uaddr with optional timeout
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* @val: Expected value
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* @flags: FUTEX2 flags
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* @timeout: Relative timeout
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* @clockid: Clock id for the timeout
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*/
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static inline int futex2_wait(void *uaddr, long val, unsigned int flags,
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struct timespec *timeout, clockid_t clockid)
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{
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return syscall(__NR_futex_wait, uaddr, val, ~0U, flags, timeout, clockid);
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}
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/*
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* futex2_wake() - Wake a number of futexes
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* @nr: Number of threads to wake at most
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* @flags: FUTEX2 flags
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*/
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static inline int futex2_wake(void *uaddr, int nr, unsigned int flags)
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{
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return syscall(__NR_futex_wake, uaddr, ~0U, nr, flags);
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}
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