Re: [PATCH bpf-next v6] bpf: Change value of MAX_TAIL_CALL_CNT from 32 to 33
Date: Tue Nov 16 2021 - 08:40:20 EST
This patch was applied to bpf/bpf-next.git (master)
by Daniel Borkmann <daniel@xxxxxxxxxxxxx>:
On Fri, 5 Nov 2021 09:30:00 +0800 you wrote:
> In the current code, the actual max tail call count is 33 which is greater
> than MAX_TAIL_CALL_CNT (defined as 32), the actual limit is not consistent
> with the meaning of MAX_TAIL_CALL_CNT, there is some confusion and need to
> spend some time to think about the reason at the first glance.
> We can see the historical evolution from commit 04fd61ab36ec ("bpf: allow
> bpf programs to tail-call other bpf programs") and commit f9dabe016b63
> ("bpf: Undo off-by-one in interpreter tail call count limit").
Here is the summary with links:
- [bpf-next,v6] bpf: Change value of MAX_TAIL_CALL_CNT from 32 to 33
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