diff options
| author | Lorenz Bauer <lmb@cloudflare.com> | 2021-09-13 18:35:36 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-09-22 11:47:59 +0200 |
| commit | a4fe956b03316516ce0eca037d480d270b9bed4c (patch) | |
| tree | 2588f79e7154f90f9b455b4edbcb89766b96939d /kernel/taskstats.c | |
| parent | 872968502114d68c21419cf7eb5ab97717e7b803 (diff) | |
bpf: verifier: Allocate idmap scratch in verifier env
commit c9e73e3d2b1eb1ea7ff068e05007eec3bd8ef1c9 upstream.
func_states_equal makes a very short lived allocation for idmap,
probably because it's too large to fit on the stack. However the
function is called quite often, leading to a lot of alloc / free
churn. Replace the temporary allocation with dedicated scratch
space in struct bpf_verifier_env.
Signed-off-by: Lorenz Bauer <lmb@cloudflare.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Edward Cree <ecree.xilinx@gmail.com>
Link: https://lore.kernel.org/bpf/20210429134656.122225-4-lmb@cloudflare.com
[OP: adjusted context for 4.19]
Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/taskstats.c')
0 files changed, 0 insertions, 0 deletions