From nobody Wed Nov 27 04:48:46 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1701800480; cv=none; d=zohomail.com; s=zohoarc; b=RWCMCrBYvkx7qliAikSSgpByFqVbOkxLDN6cCVW1zd6vi2vMqaZ6Tv/jIHHNLlsW+S0Ye4vFvowXCXxCKhelMMcMNQHOEL6m3ax3SAwrTcP5if7wpcYdueic2kDz+DLgkY57GgvRfm9zwiJqNHMElrulz26AKG57jJwLOziR3Ds= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1701800480; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=pcv/XqVh2Z7iu9z6gUwclnS+Bu4/7vR59iug4jWCKh4=; b=f7/hY9ZfBEMZv9yLjfVrUxSKkzvMNRn8KAoISaKJlxUU4MvEy22/ODyaA8IB57CT+T4WVddMPykYO1hGtxaSbqpj6s6HsZiBqa+tQEmfhz7dGsp3fl8x7uLOmwvjLebGDdvdSY6Fy3VuuaZEwVzrSMlQcp7SCWleZACst56S+Z8= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) by mx.zohomail.com with SMTPS id 1701800480677823.6087522186215; Tue, 5 Dec 2023 10:21:20 -0800 (PST) Received: from list by lists.xenproject.org with outflank-mailman.648196.1012369 (Exim 4.92) (envelope-from ) id 1rAa2Q-00069X-Ij; Tue, 05 Dec 2023 18:20:54 +0000 Received: by outflank-mailman (output) from mailman id 648196.1012369; Tue, 05 Dec 2023 18:20:54 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1rAa2Q-00068I-BP; Tue, 05 Dec 2023 18:20:54 +0000 Received: by outflank-mailman (input) for mailman id 648196; Tue, 05 Dec 2023 18:20:53 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1rAa2P-0002wG-0G for xen-devel@lists.xenproject.org; Tue, 05 Dec 2023 18:20:53 +0000 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id 03bfa233-939b-11ee-9b0f-b553b5be7939; Tue, 05 Dec 2023 19:20:49 +0100 (CET) Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-84-vcT85WOuNBCsPHqsqxe_sw-1; Tue, 05 Dec 2023 13:20:42 -0500 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 309EC3C2A1C8; Tue, 5 Dec 2023 18:20:41 +0000 (UTC) Received: from localhost (unknown [10.39.194.111]) by smtp.corp.redhat.com (Postfix) with ESMTP id 716931121312; Tue, 5 Dec 2023 18:20:40 +0000 (UTC) X-Outflank-Mailman: Message body and most headers restored to incoming version X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 03bfa233-939b-11ee-9b0f-b553b5be7939 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1701800448; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=pcv/XqVh2Z7iu9z6gUwclnS+Bu4/7vR59iug4jWCKh4=; b=dPeenLW2QWqasP3i4IT7DuHtatnhn/4Qc5MekdMRc8bHeur3/M1H/Tpk+ShhgP5QMg5Lym +4MCB/mVaQm/PioyJmr3sO2WTxbkrKCz4YHbBbqTVHaVC16nURBx+bXeEE1c2Ms5ywI1OQ Th1/A7dQySjgJ42NCYMW/jUquN4S6mk= X-MC-Unique: vcT85WOuNBCsPHqsqxe_sw-1 From: Stefan Hajnoczi To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Stefan Hajnoczi , Vladimir Sementsov-Ogievskiy , Cleber Rosa , Xie Changlong , Paul Durrant , Ari Sundholm , Jason Wang , Eric Blake , John Snow , Eduardo Habkost , Wen Congyang , Alberto Garcia , Anthony Perard , "Michael S. Tsirkin" , Stefano Stabellini , qemu-block@nongnu.org, Juan Quintela , Paolo Bonzini , Kevin Wolf , Coiby Xu , Fabiano Rosas , Hanna Reitz , Zhang Chen , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Pavel Dovgalyuk , Peter Xu , Emanuele Giuseppe Esposito , Fam Zheng , Leonardo Bras , David Hildenbrand , Li Zhijian , xen-devel@lists.xenproject.org Subject: [PATCH v2 09/14] aio-wait: draw equivalence between AIO_WAIT_WHILE() and AIO_WAIT_WHILE_UNLOCKED() Date: Tue, 5 Dec 2023 13:20:06 -0500 Message-ID: <20231205182011.1976568-10-stefanha@redhat.com> In-Reply-To: <20231205182011.1976568-1-stefanha@redhat.com> References: <20231205182011.1976568-1-stefanha@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.3 X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1701800481120100003 Content-Type: text/plain; charset="utf-8" Now that the AioContext lock no longer exists, AIO_WAIT_WHILE() and AIO_WAIT_WHILE_UNLOCKED() are equivalent. A future patch will get rid of AIO_WAIT_WHILE_UNLOCKED(). Signed-off-by: Stefan Hajnoczi Reviewed-by: Eric Blake Reviewed-by: Kevin Wolf --- include/block/aio-wait.h | 16 ++++------------ 1 file changed, 4 insertions(+), 12 deletions(-) diff --git a/include/block/aio-wait.h b/include/block/aio-wait.h index 5449b6d742..157f105916 100644 --- a/include/block/aio-wait.h +++ b/include/block/aio-wait.h @@ -63,9 +63,6 @@ extern AioWait global_aio_wait; * @ctx: the aio context, or NULL if multiple aio contexts (for which the * caller does not hold a lock) are involved in the polling conditio= n. * @cond: wait while this conditional expression is true - * @unlock: whether to unlock and then lock again @ctx. This applies - * only when waiting for another AioContext from the main loop. - * Otherwise it's ignored. * * Wait while a condition is true. Use this to implement synchronous * operations that require event loop activity. @@ -78,7 +75,7 @@ extern AioWait global_aio_wait; * wait on conditions between two IOThreads since that could lead to deadl= ock, * go via the main loop instead. */ -#define AIO_WAIT_WHILE_INTERNAL(ctx, cond, unlock) ({ \ +#define AIO_WAIT_WHILE_INTERNAL(ctx, cond) ({ \ bool waited_ =3D false; \ AioWait *wait_ =3D &global_aio_wait; \ AioContext *ctx_ =3D (ctx); \ @@ -95,13 +92,7 @@ extern AioWait global_aio_wait; assert(qemu_get_current_aio_context() =3D=3D \ qemu_get_aio_context()); \ while ((cond)) { \ - if (unlock && ctx_) { \ - aio_context_release(ctx_); \ - } \ aio_poll(qemu_get_aio_context(), true); \ - if (unlock && ctx_) { \ - aio_context_acquire(ctx_); \ - } \ waited_ =3D true; \ } \ } \ @@ -109,10 +100,11 @@ extern AioWait global_aio_wait; waited_; }) =20 #define AIO_WAIT_WHILE(ctx, cond) \ - AIO_WAIT_WHILE_INTERNAL(ctx, cond, true) + AIO_WAIT_WHILE_INTERNAL(ctx, cond) =20 +/* TODO replace this with AIO_WAIT_WHILE() in a future patch */ #define AIO_WAIT_WHILE_UNLOCKED(ctx, cond) \ - AIO_WAIT_WHILE_INTERNAL(ctx, cond, false) + AIO_WAIT_WHILE_INTERNAL(ctx, cond) =20 /** * aio_wait_kick: --=20 2.43.0