Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2DD1DC433FE for ; Tue, 16 Nov 2021 13:40:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 13E9363247 for ; Tue, 16 Nov 2021 13:40:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236794AbhKPNnI (ORCPT ); Tue, 16 Nov 2021 08:43:08 -0500 Received: from mail.kernel.org ([198.145.29.99]:57296 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236765AbhKPNnG (ORCPT ); Tue, 16 Nov 2021 08:43:06 -0500 Received: by mail.kernel.org (Postfix) with ESMTPS id 337E461B49; Tue, 16 Nov 2021 13:40:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1637070009; bh=37tZG4elhoAdWVqcl+AIV4z56JHbTshGPOqSm4iZCfM=; h=Subject:From:Date:References:In-Reply-To:To:Cc:From; b=rwXUdLCKWzM8MefDOObe+lsuScAjOl5EQGc6MjUAMqhMY6yEkiF2uZwCix1zDM5qf hx7VAbmfJUZATkc1qzkcghYveFynEDycdjKvMH/HmYeZSR+COZrQ9iUSlqXBUOyENj zrt1DiGrnDrqtD8PkFffIemUU8ZuyKv0AC38vt/uwjmro28a+sDjoAMMvdo8kH7WJm ktT2tuXHdDcxic+e4FpVH+TdJV8TIfCoja1UES5QS4Wx8s3DplziazZOOgD+9kc4i/ wJpkWlSUGZJt8rD0aXI25KQIheQ4I94mKykrPuEUWM13xh+MZnjpI4GEQuAmz4U1KN zWM0qJ3JBKBYQ== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH bpf-next v6] bpf: Change value of MAX_TAIL_CALL_CNT from 32 to 33 From: patchwork-bot+netdevbpf@kernel.org Message-Id: <163707000915.28808.15563696632863009519.git-patchwork-notify@kernel.org> Date: Tue, 16 Nov 2021 13:40:09 +0000 References: <1636075800-3264-1-git-send-email-yangtiezhu@loongson.cn> In-Reply-To: <1636075800-3264-1-git-send-email-yangtiezhu@loongson.cn> To: Tiezhu Yang Cc: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, linux-kernel@vger.kernel.org, lixuefeng@loongson.cn, johan.almbladh@anyfinetworks.com, kafai@fb.com, songliubraving@fb.com, yhs@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org, illusionist.neo@gmail.com, zlim.lnx@gmail.com, naveen.n.rao@linux.ibm.com, luke.r.nels@gmail.com, xi.wang@gmail.com, bjorn@kernel.org, iii@linux.ibm.com, hca@linux.ibm.com, gor@linux.ibm.com, udknight@gmail.com, davem@davemloft.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello: This patch was applied to bpf/bpf-next.git (master) by Daniel Borkmann : 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 https://git.kernel.org/bpf/bpf-next/c/ebf7f6f0a6cd You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html