On 12/20/23 01:31, Alexei Starovoitov wrote:
On Tue, Dec 19, 2023 at 7:00 AM Farbod Shahinfar
<farbod.shahinfar@xxxxxxxxx> wrote:
The kernel versions tested are:
- v6.1.0
- v6.5.6
- v6.6.0
..
I suspect the issue is related to the use of bpf_loop but I do not have
any strong evidence. Is this a known issue? Have I done something wrong?
You haven't done anything wrong :)
bpf_loop is indeed broken in kernels 6.5 and earlier
until the fixes are backported.
These patches fixed the issue:
https://lore.kernel.org/all/20231121020701.26440-1-eddyz87@xxxxxxxxx/
Are you sure you've tested on 6.6 ?
Above fixes should be there.
Thank you for the response. I think the patches you mentioned have not
been merged into the mainline kernel. After receiving your response, I
checked v6.6.7 from kernel.org and still had the problem.
I also tried the bpf-next branch. I think the bug has been fixed there.
Best regards,
Farbod
