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Add test to verify that unpinning hash tables containing internal timer structures does not trigger context warnings. Each subtest (timer_prealloc and timer_no_prealloc) can trigger the context warning when unpinning, but the warning cannot be triggered twice within a short time interval (a HZ), which is expected behavior. Signed-off-by: KaFai Wan <kafai.wan@linux.dev> Acked-by: Yonghong Song <yonghong.song@linux.dev> Link: https://lore.kernel.org/r/20251008102628.808045-3-kafai.wan@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
26 lines
528 B
C
26 lines
528 B
C
// SPDX-License-Identifier: GPL-2.0
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#include "vmlinux.h"
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#include <bpf/bpf_helpers.h>
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char _license[] SEC("license") = "GPL";
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struct timer_val {
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struct bpf_timer timer;
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};
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struct {
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__uint(type, BPF_MAP_TYPE_HASH);
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__type(key, __u32);
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__type(value, struct timer_val);
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__uint(max_entries, 1);
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} timer_prealloc SEC(".maps");
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struct {
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__uint(type, BPF_MAP_TYPE_HASH);
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__type(key, __u32);
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__type(value, struct timer_val);
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__uint(max_entries, 1);
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__uint(map_flags, BPF_F_NO_PREALLOC);
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} timer_no_prealloc SEC(".maps");
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