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| author | George Guo <guodongtai@kylinos.cn> | 2026-02-10 19:31:12 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2026-02-10 19:31:12 +0800 |
| commit | f0e4b1b6e295299f5c9c79ad546dedbdf7132f45 (patch) | |
| tree | bf156aa60e2867ce7025bdeb17768fb6dbaea0c7 /tools/perf/lib/Documentation/tutorial/git@git.tavy.me:linux.git | |
| parent | 48543c4283e76d561d11b9955222b1a3054abdb9 (diff) | |
LoongArch: Add 128-bit atomic cmpxchg support
Implement 128-bit atomic compare-and-exchange using LoongArch's
LL.D/SC.Q instructions.
At the same time, this fix the BPF scheduler test failures (scx_central
and scx_qmap) caused by kmalloc_nolock_noprof() returning NULL, due to
missing 128-bit atomics. The NULL returns lead to -ENOMEM errors during
scheduler initialization, causing test cases to fail.
Verified by testing with the scx_qmap scheduler
(located in tools/sched_ext/).
Building with `make` and running ./tools/sched_ext/build/bin/scx_qmap.
Link: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=5fb750e8a9ae
Acked-by: Hengqi Chen <hengqi.chen@gmail.com>
Tested-by: Hengqi Chen <hengqi.chen@gmail.com>
Co-developed-by:: Xi Ruoyao <xry111@xry111.site>
Signed-off-by: Xi Ruoyao <xry111@xry111.site>
Signed-off-by: George Guo <guodongtai@kylinos.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'tools/perf/lib/Documentation/tutorial/git@git.tavy.me:linux.git')
0 files changed, 0 insertions, 0 deletions