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=-8.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS 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 39789C433F5 for ; Thu, 23 Sep 2021 14:33:32 +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 DE5A16109E for ; Thu, 23 Sep 2021 14:33:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org DE5A16109E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:55004 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mTPn1-0001S2-20 for qemu-devel@archiver.kernel.org; Thu, 23 Sep 2021 10:33:31 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:51718) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mTPkl-0007k9-DI for qemu-devel@nongnu.org; Thu, 23 Sep 2021 10:31:12 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:35365) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mTPki-00047C-60 for qemu-devel@nongnu.org; Thu, 23 Sep 2021 10:31:09 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1632407465; 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; bh=Yp+EsapZkh6Rl9HbMkyRLLg3g9tdtgTzRzEwcKwAsF4=; b=SY/x573xii81ju4dC+/Somxgi7yGZ73/AnFJEL3COSMxi1787Qk94d2DRo+7RRoKqvmtaw okVFJf/youvQYM1Aw0rSH3edjQUsy8Ln02U8tQRWfBn4wufY+ZPnprYF30HUOo7JzsGzp6 xRr8r1qhFAjyuugmR33yf+mpENfIH2g= 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-565-WxQ1hV_CNZ6320W_ajgHYA-1; Thu, 23 Sep 2021 10:31:04 -0400 X-MC-Unique: WxQ1hV_CNZ6320W_ajgHYA-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id A97A8100CCC2; Thu, 23 Sep 2021 14:31:03 +0000 (UTC) Received: from steredhat.redhat.com (unknown [10.39.193.145]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0E543421F; Thu, 23 Sep 2021 14:31:01 +0000 (UTC) From: Stefano Garzarella To: qemu-devel@nongnu.org Subject: [PATCH 0/3] linux-aio: allow block devices to limit aio-max-batch Date: Thu, 23 Sep 2021 16:30:57 +0200 Message-Id: <20210923143100.182979-1-sgarzare@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=sgarzare@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=216.205.24.124; envelope-from=sgarzare@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -42 X-Spam_score: -4.3 X-Spam_bar: ---- X-Spam_report: (-4.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.473, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no 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: Kevin Wolf , qemu-block@nongnu.org, Markus Armbruster , Hanna Reitz , Stefan Hajnoczi , Eric Blake Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Commit d7ddd0a161 ("linux-aio: limit the batch size using `aio-max-batch` parameter") added a way to limit the batch size of Linux AIO backend for the entire AIO context. The same AIO context can be shared by multiple devices, so latency-sensitive devices may want to limit the batch size even more to avoid increasing latency. This series add the `aio-max-batch` option to the file backend, and use it in laio_co_submit() and laio_io_unplug() to limit the Linux AIO batch size more than the limit set by the AIO context. Stefano Garzarella (3): file-posix: add `aio-max-batch` option linux-aio: add `dev_max_batch` parameter to laio_co_submit() linux-aio: add `dev_max_batch` parameter to laio_io_unplug() qapi/block-core.json | 5 +++++ include/block/raw-aio.h | 6 ++++-- block/file-posix.c | 14 ++++++++++++-- block/linux-aio.c | 38 +++++++++++++++++++++++++++----------- 4 files changed, 48 insertions(+), 15 deletions(-) -- 2.31.1