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=-8.4 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham 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 EB2FCC433E1 for ; Fri, 15 May 2020 14:05:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C54C820657 for ; Fri, 15 May 2020 14:05:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="C91xOVIn" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726257AbgEOOFx (ORCPT ); Fri, 15 May 2020 10:05:53 -0400 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:30775 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726204AbgEOOFw (ORCPT ); Fri, 15 May 2020 10:05:52 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1589551551; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=91p8Drd0kFpbtxKFOwPVtDo82KBQZkt5SLipVlwY5PM=; b=C91xOVInF2CSEnXcBGv+6u6U97ShF4M3kGRQBaZ7V8DNhrOjYO2Zli6c3h/TS5jr6gFzSL 2Bg+MSFEHvYYr1F+2LcVsnyEw/vj14HCPzChpBPhwkqY0DS7n5qRv36HcjTB0zou0YhpLV PQSC0OGXE6npNh9fBP6EQ/qLGzUc2Ho= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-43-hnMU9pWrPn6l1oD8WHgaOA-1; Fri, 15 May 2020 10:05:48 -0400 X-MC-Unique: hnMU9pWrPn6l1oD8WHgaOA-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 170C31800D4A; Fri, 15 May 2020 14:05:47 +0000 (UTC) Received: from [10.36.114.77] (ovpn-114-77.ams2.redhat.com [10.36.114.77]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1923E3A2; Fri, 15 May 2020 14:05:41 +0000 (UTC) Subject: Re: [PATCH v1 08/17] migration/colo: Use ram_block_discard_set_broken() To: "Dr. David Alan Gilbert" Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, qemu-s390x@nongnu.org, Richard Henderson , Paolo Bonzini , Eduardo Habkost , "Michael S . Tsirkin" , Hailiang Zhang , Juan Quintela References: <20200506094948.76388-1-david@redhat.com> <20200506094948.76388-9-david@redhat.com> <20200515135841.GF2954@work-vm> From: David Hildenbrand Autocrypt: addr=david@redhat.com; prefer-encrypt=mutual; keydata= mQINBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABtCREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT6JAlgEEwEIAEICGwMFCQlmAYAGCwkIBwMCBhUI AgkKCwQWAgMBAh4BAheAFiEEG9nKrXNcTDpGDfzKTd4Q9wD/g1oFAl3pImkCGQEACgkQTd4Q 9wD/g1o+VA//SFvIHUAvul05u6wKv/pIR6aICPdpF9EIgEU448g+7FfDgQwcEny1pbEzAmiw zAXIQ9H0NZh96lcq+yDLtONnXk/bEYWHHUA014A1wqcYNRY8RvY1+eVHb0uu0KYQoXkzvu+s Dncuguk470XPnscL27hs8PgOP6QjG4jt75K2LfZ0eAqTOUCZTJxA8A7E9+XTYuU0hs7QVrWJ jQdFxQbRMrYz7uP8KmTK9/Cnvqehgl4EzyRaZppshruKMeyheBgvgJd5On1wWq4ZUV5PFM4x II3QbD3EJfWbaJMR55jI9dMFa+vK7MFz3rhWOkEx/QR959lfdRSTXdxs8V3zDvChcmRVGN8U Vo93d1YNtWnA9w6oCW1dnDZ4kgQZZSBIjp6iHcA08apzh7DPi08jL7M9UQByeYGr8KuR4i6e RZI6xhlZerUScVzn35ONwOC91VdYiQgjemiVLq1WDDZ3B7DIzUZ4RQTOaIWdtXBWb8zWakt/ ztGhsx0e39Gvt3391O1PgcA7ilhvqrBPemJrlb9xSPPRbaNAW39P8ws/UJnzSJqnHMVxbRZC Am4add/SM+OCP0w3xYss1jy9T+XdZa0lhUvJfLy7tNcjVG/sxkBXOaSC24MFPuwnoC9WvCVQ ZBxouph3kqc4Dt5X1EeXVLeba+466P1fe1rC8MbcwDkoUo65Ag0EVcufkQEQAOfX3n0g0fZz Bgm/S2zF/kxQKCEKP8ID+Vz8sy2GpDvveBq4H2Y34XWsT1zLJdvqPI4af4ZSMxuerWjXbVWb T6d4odQIG0fKx4F8NccDqbgHeZRNajXeeJ3R7gAzvWvQNLz4piHrO/B4tf8svmRBL0ZB5P5A 2uhdwLU3NZuK22zpNn4is87BPWF8HhY0L5fafgDMOqnf4guJVJPYNPhUFzXUbPqOKOkL8ojk CXxkOFHAbjstSK5Ca3fKquY3rdX3DNo+EL7FvAiw1mUtS+5GeYE+RMnDCsVFm/C7kY8c2d0G NWkB9pJM5+mnIoFNxy7YBcldYATVeOHoY4LyaUWNnAvFYWp08dHWfZo9WCiJMuTfgtH9tc75 7QanMVdPt6fDK8UUXIBLQ2TWr/sQKE9xtFuEmoQGlE1l6bGaDnnMLcYu+Asp3kDT0w4zYGsx 5r6XQVRH4+5N6eHZiaeYtFOujp5n+pjBaQK7wUUjDilPQ5QMzIuCL4YjVoylWiBNknvQWBXS lQCWmavOT9sttGQXdPCC5ynI+1ymZC1ORZKANLnRAb0NH/UCzcsstw2TAkFnMEbo9Zu9w7Kv AxBQXWeXhJI9XQssfrf4Gusdqx8nPEpfOqCtbbwJMATbHyqLt7/oz/5deGuwxgb65pWIzufa N7eop7uh+6bezi+rugUI+w6DABEBAAGJAiUEGAECAA8FAlXLn5ECGwwFCQlmAYAACgkQTd4Q 9wD/g1qA6w/+M+ggFv+JdVsz5+ZIc6MSyGUozASX+bmIuPeIecc9UsFRatc91LuJCKMkD9Uv GOcWSeFpLrSGRQ1Z7EMzFVU//qVs6uzhsNk0RYMyS0B6oloW3FpyQ+zOVylFWQCzoyyf227y GW8HnXunJSC+4PtlL2AY4yZjAVAPLK2l6mhgClVXTQ/S7cBoTQKP+jvVJOoYkpnFxWE9pn4t H5QIFk7Ip8TKr5k3fXVWk4lnUi9MTF/5L/mWqdyIO1s7cjharQCstfWCzWrVeVctpVoDfJWp 4LwTuQ5yEM2KcPeElLg5fR7WB2zH97oI6/Ko2DlovmfQqXh9xWozQt0iGy5tWzh6I0JrlcxJ ileZWLccC4XKD1037Hy2FLAjzfoWgwBLA6ULu0exOOdIa58H4PsXtkFPrUF980EEibUp0zFz GotRVekFAceUaRvAj7dh76cToeZkfsjAvBVb4COXuhgX6N4pofgNkW2AtgYu1nUsPAo+NftU CxrhjHtLn4QEBpkbErnXQyMjHpIatlYGutVMS91XTQXYydCh5crMPs7hYVsvnmGHIaB9ZMfB njnuI31KBiLUks+paRkHQlFcgS2N3gkRBzH7xSZ+t7Re3jvXdXEzKBbQ+dC3lpJB0wPnyMcX FOTT3aZT7IgePkt5iC/BKBk3hqKteTnJFeVIT7EC+a6YUFg= Organization: Red Hat GmbH Message-ID: Date: Fri, 15 May 2020 16:05:41 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <20200515135841.GF2954@work-vm> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 15.05.20 15:58, Dr. David Alan Gilbert wrote: > * David Hildenbrand (david@redhat.com) wrote: >> COLO will copy all memory in a RAM block, mark discarding of RAM broken. >> >> Cc: "Michael S. Tsirkin" >> Cc: Hailiang Zhang >> Cc: Juan Quintela >> Cc: "Dr. David Alan Gilbert" >> Signed-off-by: David Hildenbrand >> --- >> include/migration/colo.h | 2 +- >> migration/migration.c | 8 +++++++- >> migration/savevm.c | 11 +++++++++-- >> 3 files changed, 17 insertions(+), 4 deletions(-) >> >> diff --git a/include/migration/colo.h b/include/migration/colo.h >> index 1636e6f907..768e1f04c3 100644 >> --- a/include/migration/colo.h >> +++ b/include/migration/colo.h >> @@ -25,7 +25,7 @@ void migrate_start_colo_process(MigrationState *s); >> bool migration_in_colo_state(void); >> >> /* loadvm */ >> -void migration_incoming_enable_colo(void); >> +int migration_incoming_enable_colo(void); >> void migration_incoming_disable_colo(void); >> bool migration_incoming_colo_enabled(void); >> void *colo_process_incoming_thread(void *opaque); >> diff --git a/migration/migration.c b/migration/migration.c >> index 177cce9e95..f6830e4620 100644 >> --- a/migration/migration.c >> +++ b/migration/migration.c >> @@ -338,12 +338,18 @@ bool migration_incoming_colo_enabled(void) >> >> void migration_incoming_disable_colo(void) >> { >> + ram_block_discard_set_broken(false); >> migration_colo_enabled = false; >> } >> >> -void migration_incoming_enable_colo(void) >> +int migration_incoming_enable_colo(void) >> { >> + if (ram_block_discard_set_broken(true)) { >> + error_report("COLO: cannot set discarding of RAM broken"); > > I'd prefer 'COLO: cannot disable RAM discard' > > 'broken' suggests the user has to go and fix something or report a bug > or something. Sounds better, I'll adjust similar messages in the other patches. Thanks! > > Other than that: > > > Reviewed-by: Dr. David Alan Gilbert > > Dave -- Thanks, David / dhildenb 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=-8.1 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 D1330C433E2 for ; Fri, 15 May 2020 14:06:31 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 975AA20657 for ; Fri, 15 May 2020 14:06:31 +0000 (UTC) Authentication-Results: mail.kernel.org; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <20200515135841.GF2954@work-vm> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Received-SPF: pass client-ip=207.211.31.81; envelope-from=david@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/15 00:39:12 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Eduardo Habkost , kvm@vger.kernel.org, "Michael S . Tsirkin" , Juan Quintela , qemu-devel@nongnu.org, qemu-s390x@nongnu.org, Hailiang Zhang , Paolo Bonzini , Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 15.05.20 15:58, Dr. David Alan Gilbert wrote: > * David Hildenbrand (david@redhat.com) wrote: >> COLO will copy all memory in a RAM block, mark discarding of RAM broken. >> >> Cc: "Michael S. Tsirkin" >> Cc: Hailiang Zhang >> Cc: Juan Quintela >> Cc: "Dr. David Alan Gilbert" >> Signed-off-by: David Hildenbrand >> --- >> include/migration/colo.h | 2 +- >> migration/migration.c | 8 +++++++- >> migration/savevm.c | 11 +++++++++-- >> 3 files changed, 17 insertions(+), 4 deletions(-) >> >> diff --git a/include/migration/colo.h b/include/migration/colo.h >> index 1636e6f907..768e1f04c3 100644 >> --- a/include/migration/colo.h >> +++ b/include/migration/colo.h >> @@ -25,7 +25,7 @@ void migrate_start_colo_process(MigrationState *s); >> bool migration_in_colo_state(void); >> >> /* loadvm */ >> -void migration_incoming_enable_colo(void); >> +int migration_incoming_enable_colo(void); >> void migration_incoming_disable_colo(void); >> bool migration_incoming_colo_enabled(void); >> void *colo_process_incoming_thread(void *opaque); >> diff --git a/migration/migration.c b/migration/migration.c >> index 177cce9e95..f6830e4620 100644 >> --- a/migration/migration.c >> +++ b/migration/migration.c >> @@ -338,12 +338,18 @@ bool migration_incoming_colo_enabled(void) >> >> void migration_incoming_disable_colo(void) >> { >> + ram_block_discard_set_broken(false); >> migration_colo_enabled = false; >> } >> >> -void migration_incoming_enable_colo(void) >> +int migration_incoming_enable_colo(void) >> { >> + if (ram_block_discard_set_broken(true)) { >> + error_report("COLO: cannot set discarding of RAM broken"); > > I'd prefer 'COLO: cannot disable RAM discard' > > 'broken' suggests the user has to go and fix something or report a bug > or something. Sounds better, I'll adjust similar messages in the other patches. Thanks! > > Other than that: > > > Reviewed-by: Dr. David Alan Gilbert > > Dave -- Thanks, David / dhildenb