From mboxrd@z Thu Jan 1 00:00:00 1970 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=-0.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no 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 DE7E1C43603 for ; Wed, 18 Dec 2019 15:10:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B13702146E for ; Wed, 18 Dec 2019 15:10:21 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="eAFlQ8PW" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726985AbfLRPKV (ORCPT ); Wed, 18 Dec 2019 10:10:21 -0500 Received: from us-smtp-2.mimecast.com ([207.211.31.81]:38614 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726984AbfLRPKU (ORCPT ); Wed, 18 Dec 2019 10:10:20 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1576681820; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=QM58zRG2E33uopTi5C1OLZUP84XlNWgGlqpWQbuCIPw=; b=eAFlQ8PWyc5idYxnRbP3kQsyHNiR5db4+CFEwT1CnrbM8uAkyTk/dhk6nBkABlMjNS3Jgg b7nZBN4tjjay6iCfZktMZzXpfH3O2vxeu3oM36Bwuz3fKyWdb7VfnXBeAYjoRMg2CjwRTW qt/1x3KyX5szo4kCz2TV6aTgc15SFus= Received: from mail-qv1-f72.google.com (mail-qv1-f72.google.com [209.85.219.72]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-1-PMNkdoeONmSQ8PFwbI4vgA-1; Wed, 18 Dec 2019 10:10:17 -0500 X-MC-Unique: PMNkdoeONmSQ8PFwbI4vgA-1 Received: by mail-qv1-f72.google.com with SMTP id v5so1489504qvn.21 for ; Wed, 18 Dec 2019 07:10:16 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=QM58zRG2E33uopTi5C1OLZUP84XlNWgGlqpWQbuCIPw=; b=aGzV1+j/e86lik/iE9kT28LsP3epYMetiyENlo0t6jygk5jhlTqLA5CDnntUz2uwOp rfeO1IgEIf9+1xumN7awPTSfyY7Zy2dehxqWMl+sqWSph/gF4p1WAQts39S4y4XKkHXM 2ZYGWONkUDGSiaDvmkNT4PbuBgA9xXXmyBGkCEgh9lZUZRhnSoYMoqgOq5eCBtsi1i7w m7FvH1OugSXescurGbBfXj6FN8xvn2f8Li8B3d/g0Tx7AcM4Ucx62fQP/AbP3dHXnJQH PbVyzIpo+4YqWyLus5M0v/LPw7U1VM947Y69f41sjrtlVLQHvM/7X31rA/7oDjjBl/0s TSdA== X-Gm-Message-State: APjAAAWY0mhMq2KOylcmCvplG9tVXWOePN8cNN73U58AqnJA0p/LqUvV rOMwlMgvo6maYZ7xishyLlrABB4XUpJF88w4OY6yOgvXPYSW4h5UnYbwVsf83Y3nlTxw7qLdKip Tf9KMb5PdIQEW3fENwAH6ng== X-Received: by 2002:a0c:e1ce:: with SMTP id v14mr2673044qvl.39.1576681816435; Wed, 18 Dec 2019 07:10:16 -0800 (PST) X-Google-Smtp-Source: APXvYqwhQfsc+4bORIeWfJPGw6vR+W11ECcHruYmI+Dy/4t2QYKRuVwYMstb8WaGcqyUqp1oBsusFQ== X-Received: by 2002:a0c:e1ce:: with SMTP id v14mr2673022qvl.39.1576681816185; Wed, 18 Dec 2019 07:10:16 -0800 (PST) Received: from redhat.com (bzq-79-181-48-215.red.bezeqint.net. [79.181.48.215]) by smtp.gmail.com with ESMTPSA id i19sm716606qki.124.2019.12.18.07.10.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Dec 2019 07:10:15 -0800 (PST) Date: Wed, 18 Dec 2019 10:10:11 -0500 From: "Michael S. Tsirkin" To: Christian Borntraeger Cc: "virtualization@lists.linux-foundation.org" , Stephen Rothwell , Linux Next Mailing List , "linux-kernel@vger.kernel.org" , kvm list , Halil Pasic Subject: Re: vhost changes (batched) in linux-next after 12/13 trigger random crashes in KVM guests after reboot Message-ID: <20191218100926-mutt-send-email-mst@kernel.org> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: linux-next-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-next@vger.kernel.org On Wed, Dec 18, 2019 at 03:43:43PM +0100, Christian Borntraeger wrote: > Michael, > > with > commit db7286b100b503ef80612884453bed53d74c9a16 (refs/bisect/skip-db7286b100b503ef80612884453bed53d74c9a16) > vhost: use batched version by default > plus > commit 6bd262d5eafcdf8cdfae491e2e748e4e434dcda6 (HEAD, refs/bisect/bad) > Revert "vhost/net: add an option to test new code" > to make things compile (your next tree is not easily bisectable, can you fix that as well?). I'll try. > > I get random crashes in my s390 KVM guests after reboot. > Reverting both patches together with commit decd9b8 "vhost: use vhost_desc instead of vhost_log" to > make it compile again) on top of linux-next-1218 makes the problem go away. > > Looks like the batched version is not yet ready for prime time. Can you drop these patches until > we have fixed the issues? > > Christian > Will do, thanks for letting me know. -- MST