From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Jason@zx2c4.com Received: from krantz.zx2c4.com (localhost [127.0.0.1]) by krantz.zx2c4.com (ZX2C4 Mail Server) with ESMTP id e29ea5fe for ; Tue, 21 Mar 2017 17:29:38 +0000 (UTC) Received: from frisell.zx2c4.com (frisell.zx2c4.com [192.95.5.64]) by krantz.zx2c4.com (ZX2C4 Mail Server) with ESMTP id e9c8a415 for ; Tue, 21 Mar 2017 17:29:38 +0000 (UTC) Received: by frisell.zx2c4.com (ZX2C4 Mail Server) with ESMTP id 06da08c7 for ; Tue, 21 Mar 2017 17:29:38 +0000 (UTC) Received: by frisell.zx2c4.com (ZX2C4 Mail Server) with ESMTPSA id cb7e1a9d (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128:NO) for ; Tue, 21 Mar 2017 17:29:38 +0000 (UTC) Received: by mail-ot0-f176.google.com with SMTP id o24so155777929otb.1 for ; Tue, 21 Mar 2017 10:33:57 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: References: <7a3a5f6d-1eb5-ef32-097e-e24c2f9d2805@sholland.org> <05adeaed-20ff-ce42-b8c6-73bbc55d7021@sholland.org> From: "Jason A. Donenfeld" Date: Tue, 21 Mar 2017 18:33:56 +0100 Message-ID: Subject: Re: Instability during large transfers To: Samuel Holland Content-Type: text/plain; charset=UTF-8 Cc: WireGuard mailing list List-Id: Development discussion of WireGuard List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hey Samuel, Thanks for sticking with it... This is a super hard bug to track down! I wish I could reproduce it. Can you try two odd things, separately, and report back? 1. Compile with DEBUG_ATOMIC_SLEEP. Do you get any additional warnings? 2. Hack kernel/sched/Makefile to remove "-fno-omit-frame-pointer" and see if the backtraces you get are a bit more coherent. Feel free to find me on IRC. Jason