Received: by 2002:ac0:a5a7:0:0:0:0:0 with SMTP id m36-v6csp6611544imm; Mon, 23 Jul 2018 23:12:43 -0700 (PDT) X-Google-Smtp-Source: AAOMgpfjvBLRRoiF0Nya56XNFQXVTUfF6GBXNvP6QdS2oZkbHQo/0qLACz95fDoUTWUx09jtU5ta X-Received: by 2002:a17:902:123:: with SMTP id 32-v6mr15338044plb.181.1532412763520; Mon, 23 Jul 2018 23:12:43 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1532412763; cv=none; d=google.com; s=arc-20160816; b=qds7XQAauWYZngBbWBqi7q0Kui+F/2PHhgvgAvb6cRNFoaeyXsFIRHQN5XE8M6LvLv uk8J7sRz4rdWg2/R7YjPIPhow0ha6yWjX3p2b/hr4zHS8ZE4th68myW3kZFycDJrg179 7wb5Bwx+oZTnes9nXwFOYmAvANeiXaPq+AooudaZFG7etb1gQWPVUDI3YFnsUxbEdCZ9 yScEnITuXRPmmI3vUjCJvNCIeZbCA0fUNp5jy2K25+CpNKrW5T3SlGWmG/YO1sy2YMx7 D5VNpdjSU5BzOQEbqfVoVLxVH+2wlXMPNK0djU7fALIp4tgaQJIAsZqvAmCGWSHkcBT1 BDZw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:user-agent:references :message-id:in-reply-to:subject:cc:to:from:date :arc-authentication-results; bh=ARtylJAD2tHoPfQMiVFSv0F7LWuoJFhWxEelBMd1cPc=; b=KO/PE2S1XfJgUwXOMhY0wP0TFT9dmIMIPv3fePBtqgOYwvEhKr2DnqqQYpUtcc2zkt 0ORgxP+E1AEA1gwZiB+6C/NMyJqyE79NcvQAOphijjx1lHeTS3+t7ICtCKj61SqDMWIV QyGGpJpnLykXDKn6IAZjxiNfCmcTwOy8NpWF7/xgihrhqWRtx4aVkJ05vUyCZ3N3aXQW 0w3zAdvn3ur+AlfxN3nbpddNwSakOLn9lPaSLB9SokzTY4JhIDDwQa0wYhm9kAPcUEGG 4omgaLDcpFUWA3WROYeNVaP2PbUaHAKljAegOdQQhcxNuxAF6gOLg01XfvzKDEInJwR2 qtxg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id l30-v6si4372347plg.12.2018.07.23.23.12.26; Mon, 23 Jul 2018 23:12:43 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388308AbeGXHQX (ORCPT + 99 others); Tue, 24 Jul 2018 03:16:23 -0400 Received: from smtp2.it.da.ut.ee ([193.40.5.67]:57462 "EHLO smtp2.it.da.ut.ee" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388146AbeGXHQX (ORCPT ); Tue, 24 Jul 2018 03:16:23 -0400 Received: from math.ut.ee (unknown [IPv6:2001:bb8:2002:2400:5054:ff:fe3b:8db9]) by smtp2.it.da.ut.ee (Postfix) with ESMTP id A0B7B9005D; Tue, 24 Jul 2018 09:11:31 +0300 (EEST) Received: by math.ut.ee (Postfix, from userid 1014) id 84504220910; Tue, 24 Jul 2018 09:11:29 +0300 (EEST) Received: from localhost (localhost [127.0.0.1]) by math.ut.ee (Postfix) with ESMTP id 8C1C9220665; Tue, 24 Jul 2018 09:11:29 +0300 (EEST) Date: Tue, 24 Jul 2018 09:11:29 +0300 (EEST) From: Meelis Roos To: Daniel Borkmann cc: Arnd Bergmann , Linux Kernel list , Networking Subject: Re: bisected: 4.18-rc* regression: x86-32 troubles (with timers?) In-Reply-To: <4a48811d-4094-ee4c-33ca-2cf0446a6313@iogearbox.net> Message-ID: References: <32227088-7754-c160-8046-e860f42ca91c@iogearbox.net> <4a48811d-4094-ee4c-33ca-2cf0446a6313@iogearbox.net> User-Agent: Alpine 2.21 (LRH 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > >> I would be curious as well about that whether revert would make it > >> work. What's the value of sysctl net.core.bpf_jit_enable ? Does it > >> change anything if you set it to 0 (only interpreter) or 1 (JIT > >> enabled). Seems a bit strange to me that bisect ended at this commit > >> given the issue you have. The JIT itself was also new in this window > >> fwiw. In any case some more debug info would be great to have. > > > > net.core.bpf_jit_enable is 1. > > > > Since it breaks bootup, I can not easily change the value at runtime (it > > would be postfactum). Do you mean changing the > > CONFIG_BPF_JIT_ALWAYS_ON=y option? > > Yeah if you chance it to N, and don't have any fixed /etc/sysctl.conf > setting, then you'll boot up with interpreter first (net.core.bpf_jit_enable > as 0). Curious whether that works just fine for you. Disabled CONFIG_BPF_JIT_ALWAYS_ON on v4.18-rc5 and it works, tested on 2 bootups. -- Meelis Roos (mroos@linux.ee)