From nobody Mon Feb 9 06:00:49 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.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; Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zoho.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=gmail.com ARC-Seal: i=1; a=rsa-sha256; t=1560175176; cv=none; d=zoho.com; s=zohoarc; b=IRt4dQUzmAi/VqAW+kLUb+GvX2waZHtVmCp2wglQ1zU0iWMaVaJS1uQ+grfniyerFRCSnL1FkfdX4TFH399S46R0KjQElPIwO5uxT58Ln1iQlus3xYH1vBqRV+Z+/94AVxtYqMJ3rgk3zF+1KiK2UgjK8RbA5yKR4oM150mYNbw= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1560175176; h=Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:Message-ID:References:Sender:Subject:To:ARC-Authentication-Results; bh=BkrqkXKw+QojOLRD6HxRpYEmbe+jRwaGL11dLaGKZ5o=; b=VNl/C2rvsw53TseEiiyZ8mlXebOj4IfFvBH0QOv/nA0XcR8aXG7tZZmHvHOdu71JBCYXlG1IfHecjqx6b7ybcsFfK5AQ4z6At0nTeiHcuPiYu/nCTgAoAIzzMmr4NPaPaPDnxEOwK3VFMqLxp4JCQl4mrNCZxDG8a2Gt2386OfA= ARC-Authentication-Results: i=1; mx.zoho.com; dkim=fail; spf=pass (zoho.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 header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1560175176201195.57645126176294; Mon, 10 Jun 2019 06:59:36 -0700 (PDT) Received: from localhost ([::1]:46790 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1haKph-0001rZ-3I for importer@patchew.org; Mon, 10 Jun 2019 09:59:33 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:51365) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1haKh5-0000S3-9B for qemu-devel@nongnu.org; Mon, 10 Jun 2019 09:50:42 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1haKh3-0002Ck-16 for qemu-devel@nongnu.org; Mon, 10 Jun 2019 09:50:39 -0400 Received: from mail-pf1-x441.google.com ([2607:f8b0:4864:20::441]:35785) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1haKgx-00027P-6e; Mon, 10 Jun 2019 09:50:33 -0400 Received: by mail-pf1-x441.google.com with SMTP id d126so5364297pfd.2; Mon, 10 Jun 2019 06:50:26 -0700 (PDT) Received: from localhost.localdomain ([136.233.9.100]) by smtp.gmail.com with ESMTPSA id d4sm13969837pfc.149.2019.06.10.06.50.19 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 10 Jun 2019 06:50:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=BkrqkXKw+QojOLRD6HxRpYEmbe+jRwaGL11dLaGKZ5o=; b=W6bx19vM75M0ca6e2UTVcmIVqjofcKVti0vnXTCULtzXI5M03HYLmrwR4Ffidbzfkz 7Y8ezAfHO1VNv3F+JiFD7FGo69bL1ZSefUiq7NX9hvuQWVQMWQjzp2dJyxSpWyAWacv4 dsvJLEUaYFvHqN9UHxTDVzJKD+yrMbG0UyyNi1OKReuOZU9dCA4IUXRKjVgY04y9go/4 ayv9NDYNDOMrq/zeFb9gY/0lvKD80e0hWD5xUPOgCwVYtH7c9xkRLynFaIMIUtRucJQU oq/UfgQxajmn4861fJuuP4rEA9f2mpyRbKqui2uuCWHiwBeNgGqIaeSjaUcExcHQV1Ou FAuw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=BkrqkXKw+QojOLRD6HxRpYEmbe+jRwaGL11dLaGKZ5o=; b=uAv1NDxiiuwCD+AnqOvmqdfAlsqB+ny5OnvepPIBprulpBXDnwupDigDf1YjwgRqIr Mm/NBJwnGbXuqnBIc2hqpI207CSiCZUr39U31yENkerLiRgZS7MsWc2nb8n1bixE0oMQ EXLk+9ihFuGtgaccbbkRU6sKvGe6RsGkxIaMb0uNbDNc4C/0i+B3OZQPExwGK9JdW+0Z 14AsZ+9N4L4Tcu5h3CQHC9/jt98NgRCUgnDFEY0mJaGPfnRql9rb2fdI035f3tCNSKxm awRRm3llayDnxZepmqQ8pVHRMkjNbnU5UQBb9B3JwbH+kGqM6szGge7m88L+5dlnXhr9 pQCg== X-Gm-Message-State: APjAAAVWav+57agPttK2mMSOp2Lm0ttYMvoZY4yMsU/ketnblsuw9ykR ekXnA3n25T6bWVXHGLJerbhM1B74traCSA== X-Google-Smtp-Source: APXvYqzMr81NSKc5yXFVkUdzOsVEGm9uEwQFiOk8aWEpb8i7b9gsRwHT0V9saw2qrhEuGml4/8rotw== X-Received: by 2002:a17:90a:2244:: with SMTP id c62mr5214620pje.29.1560174625653; Mon, 10 Jun 2019 06:50:25 -0700 (PDT) From: Aarushi Mehta To: qemu-devel@nongnu.org Date: Mon, 10 Jun 2019 19:19:01 +0530 Message-Id: <20190610134905.22294-9-mehta.aaru20@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190610134905.22294-1-mehta.aaru20@gmail.com> References: <20190610134905.22294-1-mehta.aaru20@gmail.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::441 Subject: [Qemu-devel] [PATCH v5 08/12] block/file-posix.c: extend to use io_uring 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: Fam Zheng , Kevin Wolf , Sergio Lopez , qemu-block@nongnu.org, Markus Armbruster , Max Reitz , saket.sinha89@gmail.com, Stefan Hajnoczi , Paolo Bonzini , Maxim Levitsky , Julia Suvorova , Aarushi Mehta Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Signed-off-by: Aarushi Mehta Reviewed-by: Maxim Levitsky --- block/file-posix.c | 85 +++++++++++++++++++++++++++++++++++++--------- 1 file changed, 69 insertions(+), 16 deletions(-) diff --git a/block/file-posix.c b/block/file-posix.c index d018429672..211dfe5337 100644 --- a/block/file-posix.c +++ b/block/file-posix.c @@ -154,6 +154,7 @@ typedef struct BDRVRawState { bool has_write_zeroes:1; bool discard_zeroes:1; bool use_linux_aio:1; + bool use_linux_io_uring:1; bool page_cache_inconsistent:1; bool has_fallocate; bool needs_alignment; @@ -423,7 +424,7 @@ static QemuOptsList raw_runtime_opts =3D { { .name =3D "aio", .type =3D QEMU_OPT_STRING, - .help =3D "host AIO implementation (threads, native)", + .help =3D "host AIO implementation (threads, native, io_uring)= ", }, { .name =3D "locking", @@ -482,9 +483,15 @@ static int raw_open_common(BlockDriverState *bs, QDict= *options, goto fail; } =20 - aio_default =3D (bdrv_flags & BDRV_O_NATIVE_AIO) - ? BLOCKDEV_AIO_OPTIONS_NATIVE - : BLOCKDEV_AIO_OPTIONS_THREADS; + if (bdrv_flags & BDRV_O_NATIVE_AIO) { + aio_default =3D BLOCKDEV_AIO_OPTIONS_NATIVE; +#ifdef CONFIG_LINUX_IO_URING + } else if (bdrv_flags & BDRV_O_IO_URING) { + aio_default =3D BLOCKDEV_AIO_OPTIONS_IO_URING; +#endif + } else { + aio_default =3D BLOCKDEV_AIO_OPTIONS_THREADS; + } aio =3D qapi_enum_parse(&BlockdevAioOptions_lookup, qemu_opt_get(opts, "aio"), aio_default, &local_err); @@ -493,7 +500,11 @@ static int raw_open_common(BlockDriverState *bs, QDict= *options, ret =3D -EINVAL; goto fail; } + s->use_linux_aio =3D (aio =3D=3D BLOCKDEV_AIO_OPTIONS_NATIVE); +#ifdef CONFIG_LINUX_IO_URING + s->use_linux_io_uring =3D (aio =3D=3D BLOCKDEV_AIO_OPTIONS_IO_URING); +#endif =20 locking =3D qapi_enum_parse(&OnOffAuto_lookup, qemu_opt_get(opts, "locking"), @@ -557,7 +568,7 @@ static int raw_open_common(BlockDriverState *bs, QDict = *options, s->shared_perm =3D BLK_PERM_ALL; =20 #ifdef CONFIG_LINUX_AIO - /* Currently Linux does AIO only for files opened with O_DIRECT */ + /* Currently Linux does AIO only for files opened with O_DIRECT */ if (s->use_linux_aio) { if (!(s->open_flags & O_DIRECT)) { error_setg(errp, "aio=3Dnative was specified, but it requires " @@ -579,6 +590,22 @@ static int raw_open_common(BlockDriverState *bs, QDict= *options, } #endif /* !defined(CONFIG_LINUX_AIO) */ =20 +#ifdef CONFIG_LINUX_IO_URING + if (s->use_linux_io_uring) { + if (!aio_setup_linux_io_uring(bdrv_get_aio_context(bs), errp)) { + error_prepend(errp, "Unable to use io_uring: "); + goto fail; + } + } +#else + if (s->use_linux_io_uring) { + error_setg(errp, "aio=3Dio_uring was specified, but is not support= ed " + "in this build."); + ret =3D -EINVAL; + goto fail; + } +#endif /* !defined(CONFIG_LINUX_IO_URING) */ + s->has_discard =3D true; s->has_write_zeroes =3D true; if ((bs->open_flags & BDRV_O_NOCACHE) !=3D 0) { @@ -1875,16 +1902,20 @@ static int coroutine_fn raw_co_prw(BlockDriverState= *bs, uint64_t offset, * If this is the case tell the low-level driver that it needs * to copy the buffer. */ - if (s->needs_alignment) { - if (!bdrv_qiov_is_aligned(bs, qiov)) { - type |=3D QEMU_AIO_MISALIGNED; + if (s->needs_alignment && !bdrv_qiov_is_aligned(bs, qiov)) { + type |=3D QEMU_AIO_MISALIGNED; +#ifdef CONFIG_LINUX_IO_URING + } else if (s->use_linux_io_uring) { + LuringState *aio =3D aio_get_linux_io_uring(bdrv_get_aio_context(b= s)); + assert(qiov->size =3D=3D bytes); + return luring_co_submit(bs, aio, s->fd, offset, qiov, type); +#endif #ifdef CONFIG_LINUX_AIO - } else if (s->use_linux_aio) { - LinuxAioState *aio =3D aio_get_linux_aio(bdrv_get_aio_context(= bs)); - assert(qiov->size =3D=3D bytes); - return laio_co_submit(bs, aio, s->fd, offset, qiov, type); + } else if (s->use_linux_aio && s->needs_alignment) { + LinuxAioState *aio =3D aio_get_linux_aio(bdrv_get_aio_context(bs)); + assert(qiov->size =3D=3D bytes); + return laio_co_submit(bs, aio, s->fd, offset, qiov, type); #endif - } } =20 acb =3D (RawPosixAIOData) { @@ -1920,24 +1951,36 @@ static int coroutine_fn raw_co_pwritev(BlockDriverS= tate *bs, uint64_t offset, =20 static void raw_aio_plug(BlockDriverState *bs) { + BDRVRawState __attribute__((unused)) *s =3D bs->opaque; #ifdef CONFIG_LINUX_AIO - BDRVRawState *s =3D bs->opaque; if (s->use_linux_aio) { LinuxAioState *aio =3D aio_get_linux_aio(bdrv_get_aio_context(bs)); laio_io_plug(bs, aio); } #endif +#ifdef CONFIG_LINUX_IO_URING + if (s->use_linux_io_uring) { + LuringState *aio =3D aio_get_linux_io_uring(bdrv_get_aio_context(b= s)); + luring_io_plug(bs, aio); + } +#endif } =20 static void raw_aio_unplug(BlockDriverState *bs) { + BDRVRawState __attribute__((unused)) *s =3D bs->opaque; #ifdef CONFIG_LINUX_AIO - BDRVRawState *s =3D bs->opaque; if (s->use_linux_aio) { LinuxAioState *aio =3D aio_get_linux_aio(bdrv_get_aio_context(bs)); laio_io_unplug(bs, aio); } #endif +#ifdef CONFIG_LINUX_IO_URING + if (s->use_linux_io_uring) { + LuringState *aio =3D aio_get_linux_io_uring(bdrv_get_aio_context(b= s)); + luring_io_unplug(bs, aio); + } +#endif } =20 static int raw_co_flush_to_disk(BlockDriverState *bs) @@ -1963,8 +2006,8 @@ static int raw_co_flush_to_disk(BlockDriverState *bs) static void raw_aio_attach_aio_context(BlockDriverState *bs, AioContext *new_context) { + BDRVRawState __attribute__((unused)) *s =3D bs->opaque; #ifdef CONFIG_LINUX_AIO - BDRVRawState *s =3D bs->opaque; if (s->use_linux_aio) { Error *local_err; if (!aio_setup_linux_aio(new_context, &local_err)) { @@ -1974,6 +2017,16 @@ static void raw_aio_attach_aio_context(BlockDriverSt= ate *bs, } } #endif +#ifdef CONFIG_LINUX_IO_URING + if (s->use_linux_io_uring) { + Error *local_err; + if (!aio_setup_linux_io_uring(new_context, &local_err)) { + error_reportf_err(local_err, "Unable to use linux io_uring, " + "falling back to thread pool: "); + s->use_linux_io_uring =3D false; + } + } +#endif } =20 static void raw_close(BlockDriverState *bs) --=20 2.17.1