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From: Daniel Borkmann <daniel@iogearbox.net>
To: Maciej Fijalkowski <maciej.fijalkowski@intel.com>, ast@kernel.org
Cc: bpf@vger.kernel.org, netdev@vger.kernel.org,
	bjorn.topel@intel.com, magnus.karlsson@intel.com
Subject: Re: [PATCH bpf-next 2/5] bpf: allow for tailcalls in BPF subprograms
Date: Thu, 16 Jul 2020 23:10:09 +0200	[thread overview]
Message-ID: <d2bdea0a-84be-9932-ddd0-c5003c88210b@iogearbox.net> (raw)
In-Reply-To: <20200715233634.3868-3-maciej.fijalkowski@intel.com>

On 7/16/20 1:36 AM, Maciej Fijalkowski wrote:
> Relax verifier's restriction that was meant to forbid tailcall usage
> when subprog count was higher than 1.
> 
> Also, do not max out the stack depth of program that utilizes tailcalls.
> 
> Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>

[nit: this patch also needs reordering]

  reply	other threads:[~2020-07-16 21:10 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-15 23:36 [PATCH bpf-next 0/5] bpf: tailcalls in BPF subprograms Maciej Fijalkowski
2020-07-15 23:36 ` [PATCH bpf-next 1/5] bpf, x64: use %rcx instead of %rax for tail call retpolines Maciej Fijalkowski
2020-07-16 20:36   ` Daniel Borkmann
2020-07-17  9:29     ` Maciej Fijalkowski
2020-07-15 23:36 ` [PATCH bpf-next 2/5] bpf: allow for tailcalls in BPF subprograms Maciej Fijalkowski
2020-07-16 21:10   ` Daniel Borkmann [this message]
2020-07-16 21:29   ` Daniel Borkmann
2020-07-16 22:46     ` Daniel Borkmann
2020-07-17 11:39       ` Maciej Fijalkowski
2020-07-15 23:36 ` [PATCH bpf-next 3/5] bpf: propagate poke descriptors to subprograms Maciej Fijalkowski
2020-07-16 21:16   ` Daniel Borkmann
2020-07-17  9:36     ` Maciej Fijalkowski
2020-07-15 23:36 ` [PATCH bpf-next 4/5] bpf, x64: rework pro/epilogue and tailcall handling in JIT Maciej Fijalkowski
2020-07-16 23:06   ` Daniel Borkmann
2020-07-17  2:16     ` Alexei Starovoitov
2020-07-17 10:57       ` Maciej Fijalkowski
2020-07-17 16:16         ` Alexei Starovoitov
2020-07-17 10:52     ` Maciej Fijalkowski
2020-07-15 23:36 ` [PATCH bpf-next 5/5] selftests: bpf: add dummy prog for bpf2bpf with tailcall Maciej Fijalkowski

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