From nobody Mon Feb 9 20:12:48 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1632407790119985.5130185808946; Thu, 23 Sep 2021 07:36:30 -0700 (PDT) Received: from localhost ([::1]:60338 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mTPpo-000593-SD for importer@patchew.org; Thu, 23 Sep 2021 10:36:24 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:51804) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mTPkp-0007ks-9n for qemu-devel@nongnu.org; Thu, 23 Sep 2021 10:31:15 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:32621) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mTPkm-0004CD-I6 for qemu-devel@nongnu.org; Thu, 23 Sep 2021 10:31:15 -0400 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-302-QbH-77BHOJa5IcdpEbg1bg-1; Thu, 23 Sep 2021 10:31:10 -0400 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 89800100CCC5; Thu, 23 Sep 2021 14:31:09 +0000 (UTC) Received: from steredhat.redhat.com (unknown [10.39.193.145]) by smtp.corp.redhat.com (Postfix) with ESMTP id E5081652A1; Thu, 23 Sep 2021 14:31:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1632407471; 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; bh=JZi5383jlzG0/6auTb7p4D700iujhWdEQdKvszV7ntE=; b=QIgec3bP4u1nh4/07oYMY5DptTQ5lS5od2XsmvjyWQ1E3MhtBRUM8ODyTCRu9SI8xnsHII kYRtZMiyBovJ1eyY4gU5H25M2Yo4RmjcJ/ctA+QJkTNF8D957BNSVkjbcL/wn8djK35OTM u/O8x64qzRDXj4KW4R6vKA7K5WwJTW8= X-MC-Unique: QbH-77BHOJa5IcdpEbg1bg-1 From: Stefano Garzarella To: qemu-devel@nongnu.org Subject: [PATCH 3/3] linux-aio: add `dev_max_batch` parameter to laio_io_unplug() Date: Thu, 23 Sep 2021 16:31:00 +0200 Message-Id: <20210923143100.182979-4-sgarzare@redhat.com> In-Reply-To: <20210923143100.182979-1-sgarzare@redhat.com> References: <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-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; 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=unavailable 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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1632407792130100001 Content-Type: text/plain; charset="utf-8" Between the submission of a request and the unplug, other devices with larger limits may have been queued new requests without flushing the batch. Using the new `dev_max_batch` parameter, laio_io_unplug() can check if the batch exceeds the device limit to flush the current batch. Signed-off-by: Stefano Garzarella Reviewed-by: Stefan Hajnoczi --- include/block/raw-aio.h | 3 ++- block/file-posix.c | 2 +- block/linux-aio.c | 8 +++++--- 3 files changed, 8 insertions(+), 5 deletions(-) diff --git a/include/block/raw-aio.h b/include/block/raw-aio.h index ebd042fa27..21fc10c4c9 100644 --- a/include/block/raw-aio.h +++ b/include/block/raw-aio.h @@ -56,7 +56,8 @@ int coroutine_fn laio_co_submit(BlockDriverState *bs, Lin= uxAioState *s, int fd, void laio_detach_aio_context(LinuxAioState *s, AioContext *old_context); void laio_attach_aio_context(LinuxAioState *s, AioContext *new_context); void laio_io_plug(BlockDriverState *bs, LinuxAioState *s); -void laio_io_unplug(BlockDriverState *bs, LinuxAioState *s); +void laio_io_unplug(BlockDriverState *bs, LinuxAioState *s, + uint64_t dev_max_batch); #endif /* io_uring.c - Linux io_uring implementation */ #ifdef CONFIG_LINUX_IO_URING diff --git a/block/file-posix.c b/block/file-posix.c index 614c725235..f31a75a715 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -2125,7 +2125,7 @@ static void raw_aio_unplug(BlockDriverState *bs) #ifdef CONFIG_LINUX_AIO if (s->use_linux_aio) { LinuxAioState *aio =3D aio_get_linux_aio(bdrv_get_aio_context(bs)); - laio_io_unplug(bs, aio); + laio_io_unplug(bs, aio, s->aio_max_batch); } #endif #ifdef CONFIG_LINUX_IO_URING diff --git a/block/linux-aio.c b/block/linux-aio.c index 88b44fee72..f53ae72e21 100644 --- a/block/linux-aio.c +++ b/block/linux-aio.c @@ -356,11 +356,13 @@ void laio_io_plug(BlockDriverState *bs, LinuxAioState= *s) s->io_q.plugged++; } =20 -void laio_io_unplug(BlockDriverState *bs, LinuxAioState *s) +void laio_io_unplug(BlockDriverState *bs, LinuxAioState *s, + uint64_t dev_max_batch) { assert(s->io_q.plugged); - if (--s->io_q.plugged =3D=3D 0 && - !s->io_q.blocked && !QSIMPLEQ_EMPTY(&s->io_q.pending)) { + if (s->io_q.in_queue >=3D laio_max_batch(s, dev_max_batch) || + (--s->io_q.plugged =3D=3D 0 && + !s->io_q.blocked && !QSIMPLEQ_EMPTY(&s->io_q.pending))) { ioq_submit(s); } } --=20 2.31.1