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| author | Alexei Starovoitov <[email protected]> | 2022-10-26 06:11:47 +0000 |
|---|---|---|
| committer | Alexei Starovoitov <[email protected]> | 2022-10-26 06:11:47 +0000 |
| commit | fdf457871e7c070416403efd1533ba49adc20a87 (patch) | |
| tree | fdf22af5765c1f3c2e0c31b61f25e4e249459a20 /scripts/bpf_doc.py | |
| parent | libbpf: Btf dedup identical struct test needs check for nested structs/arrays (diff) | |
| parent | selftests/bpf: Tracing prog can still do lookup under busy lock (diff) | |
| download | kernel-fdf457871e7c070416403efd1533ba49adc20a87.tar.gz kernel-fdf457871e7c070416403efd1533ba49adc20a87.zip | |
Merge branch 'bpf: Avoid unnecessary deadlock detection and failure in task storage'
Martin KaFai Lau says:
====================
From: Martin KaFai Lau <[email protected]>
The commit bc235cdb423a ("bpf: Prevent deadlock from recursive bpf_task_storage_[get|delete]")
added deadlock detection to avoid a tracing program from recurring
on the bpf_task_storage_{get,delete}() helpers. These helpers acquire
a spin lock and it will lead to deadlock.
It is unnecessary for the bpf_lsm and bpf_iter programs which do
not recur. The situation is the same as the existing
bpf_pid_task_storage_{lookup,delete}_elem() which are
used in the syscall and they also do not have deadlock detection.
This set is to add new bpf_task_storage_{get,delete}() helper proto
without the deadlock detection. The set also removes the prog->active
check from the bpf_lsm and bpf_iter program. Please see the individual
patch for details.
====================
Signed-off-by: Alexei Starovoitov <[email protected]>
Diffstat (limited to 'scripts/bpf_doc.py')
0 files changed, 0 insertions, 0 deletions