Re: [External] Re: [PATCH bpf-next v2] selftests/bpf: fix some bugs in map_lookup_percpu_elem testcase

From: Feng Zhou
Date: Sun May 22 2022 - 22:21:44 EST


在 2022/5/21 上午6:00, Andrii Nakryiko 写道:
On Wed, May 18, 2022 at 8:44 AM Yonghong Song <yhs@xxxxxx> wrote:


On 5/17/22 7:50 PM, Feng zhou wrote:
From: Feng Zhou <zhoufeng.zf@xxxxxxxxxxxxx>

comments from Andrii Nakryiko, details in here:
https://lore.kernel.org/lkml/20220511093854.411-1-zhoufeng.zf@xxxxxxxxxxxxx/T/

use /* */ instead of //
use libbpf_num_possible_cpus() instead of sysconf(_SC_NPROCESSORS_ONLN)
use 8 bytes for value size
fix memory leak
use ASSERT_EQ instead of ASSERT_OK
add bpf_loop to fetch values on each possible CPU

Fixes: ed7c13776e20c74486b0939a3c1de984c5efb6aa ("selftests/bpf: add test case for bpf_map_lookup_percpu_elem")
Signed-off-by: Feng Zhou <zhoufeng.zf@xxxxxxxxxxxxx>
Acked-by: Yonghong Song <yhs@xxxxxx>

I've fixed remaining formatting issues and added my_pid check to avoid
accidental interference with other tests/processes. Applied to
bpf-next, thanks.

Ok, Thanks.