From patchwork Tue Oct 31 09:01:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Juan Quintela X-Patchwork-Id: 13441312 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id CF519C00142 for ; Tue, 31 Oct 2023 09:08:10 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qxke2-0000jr-14; Tue, 31 Oct 2023 05:02:42 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qxke0-0000hp-An for qemu-devel@nongnu.org; Tue, 31 Oct 2023 05:02:40 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qxkdy-0006uj-OJ for qemu-devel@nongnu.org; Tue, 31 Oct 2023 05:02:40 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1698742957; 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=v07XEObK+8HRkY6PIJKRF8OCoGMMogRwRKEZtGkEDCc=; b=EiawGvqFrSEakbl2yzZLdL4E0CNuY2+Xqz+nU8yQ6QYtWVxco+XD02akA9pHsjjDorzf5m 6iJeAPD5F4o6wgdeVuPIZadjANAgD5rVyXpcRW0Pl5m8pK2GEsQOKKKslxSma84hJnnTXe Kls7ogpQxpgL+Z01xYfvUIm+o7B2Jm8= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-655-Rt5vKY5RP3O57pE23OkKaQ-1; Tue, 31 Oct 2023 05:02:17 -0400 X-MC-Unique: Rt5vKY5RP3O57pE23OkKaQ-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (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 5FDC78A67E4; Tue, 31 Oct 2023 09:02:17 +0000 (UTC) Received: from secure.mitica (unknown [10.39.195.26]) by smtp.corp.redhat.com (Postfix) with ESMTP id C66741C060AE; Tue, 31 Oct 2023 09:02:14 +0000 (UTC) From: Juan Quintela To: qemu-devel@nongnu.org Cc: Kevin Wolf , libvir-list@redhat.com, Stefan Hajnoczi , Fam Zheng , Hanna Reitz , Li Zhijian , Peter Xu , Leonardo Bras , Juan Quintela , Eric Blake , Markus Armbruster , Hailiang Zhang , qemu-block@nongnu.org, Fabiano Rosas , Lukas Straub Subject: [PULL 11/38] migration: Simplify compress_page_with_multithread() Date: Tue, 31 Oct 2023 10:01:15 +0100 Message-ID: <20231031090142.13122-12-quintela@redhat.com> In-Reply-To: <20231031090142.13122-1-quintela@redhat.com> References: <20231031090142.13122-1-quintela@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.7 Received-SPF: pass client-ip=170.10.129.124; envelope-from=quintela@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -25 X-Spam_score: -2.6 X-Spam_bar: -- X-Spam_report: (-2.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.483, 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_H4=0.001, RCVD_IN_MSPIKE_WL=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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Move the goto to a while true. Reviewed-by: Lukas Straub Reviewed-by: Fabiano Rosas Signed-off-by: Juan Quintela Message-ID: <20231019110724.15324-6-quintela@redhat.com> --- migration/ram-compress.c | 48 ++++++++++++++++++++-------------------- 1 file changed, 24 insertions(+), 24 deletions(-) diff --git a/migration/ram-compress.c b/migration/ram-compress.c index ef03d60a6d..a991b15b7a 100644 --- a/migration/ram-compress.c +++ b/migration/ram-compress.c @@ -271,35 +271,35 @@ bool compress_page_with_multi_thread(RAMBlock *block, ram_addr_t offset, thread_count = migrate_compress_threads(); qemu_mutex_lock(&comp_done_lock); -retry: - for (int i = 0; i < thread_count; i++) { - if (comp_param[i].done) { - CompressParam *param = &comp_param[i]; - qemu_mutex_lock(¶m->mutex); - param->done = false; - send_queued_data(param); - assert(qemu_file_buffer_empty(param->file)); - compress_reset_result(param); - set_compress_params(param, block, offset); - qemu_cond_signal(¶m->cond); - qemu_mutex_unlock(¶m->mutex); + while (true) { + for (int i = 0; i < thread_count; i++) { + if (comp_param[i].done) { + CompressParam *param = &comp_param[i]; + qemu_mutex_lock(¶m->mutex); + param->done = false; + send_queued_data(param); + assert(qemu_file_buffer_empty(param->file)); + compress_reset_result(param); + set_compress_params(param, block, offset); + + qemu_cond_signal(¶m->cond); + qemu_mutex_unlock(¶m->mutex); + qemu_mutex_unlock(&comp_done_lock); + return true; + } + } + if (!wait) { qemu_mutex_unlock(&comp_done_lock); - return true; + return false; } - } - - /* - * wait for the free thread if the user specifies 'compress-wait-thread', - * otherwise we will post the page out in the main thread as normal page. - */ - if (wait) { + /* + * wait for a free thread if the user specifies + * 'compress-wait-thread', otherwise we will post the page out + * in the main thread as normal page. + */ qemu_cond_wait(&comp_done_cond, &comp_done_lock); - goto retry; } - qemu_mutex_unlock(&comp_done_lock); - - return false; } /* return the size after decompression, or negative value on error */