Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8D249C65BAF for ; Fri, 7 Dec 2018 16:19:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 518B82083D for ; Fri, 7 Dec 2018 16:19:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 518B82083D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-m68k.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nfs-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726110AbeLGQTa (ORCPT ); Fri, 7 Dec 2018 11:19:30 -0500 Received: from mail-vs1-f66.google.com ([209.85.217.66]:45811 "EHLO mail-vs1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726041AbeLGQTa (ORCPT ); Fri, 7 Dec 2018 11:19:30 -0500 Received: by mail-vs1-f66.google.com with SMTP id v10so2743385vsv.12; Fri, 07 Dec 2018 08:19:28 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=sKCXhSF44P5ohZOwcfLrWgu0vOnSIZ5gKQA9e5j6l5Y=; b=X3iGtNS0KycW86yhNRYxQ/xUQU0tFcPk+86xcPoxQf4FQGQaxJ42VcLqfoX7KErvzV v6uRO2FoEFufp6I92GIR8RG1JOW/ihbPp+T8XDeDmiB0Q0SwIx3+DTYpz8GrTICX+cB+ 6Xrkx8CX2wo/KkWF4INNZ11qNyHuFTMqA7SW6xWZe4spwcmtSvR+ybYUk9EoqM+sXMAC 60jeYvB9upcZKSLKjOkBN/r+MUnb7tZ5BSAtis4gHjN7N0qhgGHzKXCVhHsvVnQNSh9C uwfVDfKAley8141UWHWw6C8x4+w2LgHQFibC0bLFdOMV99byvAFkUPzfdvOiHWPp8QOa BodQ== X-Gm-Message-State: AA+aEWZ7P26q3oMcNK4VnWSPdFc7Tc9/mQgfeQ/TCvBod0tU8PMXIXIk 9DTic7794ehvrYN6e6Lsl3BbBrAuapS2MTqnJPBHFg== X-Google-Smtp-Source: AFSGD/U8Hv5LkSN3xKFPIGm7iVrAT3AOBNWL2Tk84x7f30F9fCRTbTLR1MB8CV813THfv8L7Zb9N0y6lAzewBLMPOo8= X-Received: by 2002:a67:3885:: with SMTP id n5mr1045428vsi.96.1544199567976; Fri, 07 Dec 2018 08:19:27 -0800 (PST) MIME-Version: 1.0 References: <20181205.221146.969453990167463340.anemo@mba.ocn.ne.jp> <20181207.235141.2138062629640003368.anemo@mba.ocn.ne.jp> In-Reply-To: <20181207.235141.2138062629640003368.anemo@mba.ocn.ne.jp> From: Geert Uytterhoeven Date: Fri, 7 Dec 2018 17:19:13 +0100 Message-ID: Subject: Re: NFS/TCP crashes on MIPS/RBTX4927 in v4.20-rcX (bisected) To: Atsushi Nemoto Cc: Trond Myklebust , "open list:NFS, SUNRPC, AND..." , linux-mips@vger.kernel.org, Linux Kernel Mailing List Content-Type: text/plain; charset="UTF-8" Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org Hi Nemoto-san, On Fri, Dec 7, 2018 at 3:51 PM Atsushi Nemoto wrote: > On Wed, 5 Dec 2018 14:41:30 +0100, Geert Uytterhoeven wrote: > > My next guess is an unaligned access not using {get,put}_unaligned(), which > > doesn't seem to work on tx4927, but doesn't cause an exception neither. > > IIRC, TX49 can raise an exception on unaligned access. I thought so, too, but had verified that reading from an unaligned address didn't raise an exception, but returned a corrupt value instead. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds