bpf: Add lookup_and_delete_elem for BPF_MAP_STACK_TRACE #5925
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The stacktrace map can be easily full, which will lead to failure in obtaining the stack. In addition to increasing the size of the map, another solution is to delete the stack_id after looking it up from the user, so extend the existing bpf_map_lookup_and_delete_elem() functionality to stacktrace map types. Signed-off-by: Tao Chen <[email protected]>
... test_stacktrace_map:PASS:compare_stack_ips stackmap vs. stack_amap 0 nsec test_stacktrace_map:PASS:stack_key_map lookup 0 nsec test_stacktrace_map:PASS:stackmap lookup and detele 0 nsec test_stacktrace_map:PASS:stackmap lookup deleted stack_id 0 nsec #397 stacktrace_map:OK ... Signed-off-by: Tao Chen <[email protected]>
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Pull request for series with
subject: bpf: Add lookup_and_delete_elem for BPF_MAP_STACK_TRACE
version: 2
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=1000599