From patchwork Fri Aug 11 15:08:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fabiano Rosas X-Patchwork-Id: 1820312 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=suse.de header.i=@suse.de header.a=rsa-sha256 header.s=susede2_rsa header.b=GnhZbBqY; dkim=pass header.d=suse.de header.i=@suse.de header.a=ed25519-sha256 header.s=susede2_ed25519 header.b=ji00aX4M; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4RMnJ10dgDz1yf6 for ; Sat, 12 Aug 2023 01:09:05 +1000 (AEST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qUTku-0000Xg-V3; Fri, 11 Aug 2023 11:08:49 -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 1qUTkr-0000X2-8L for qemu-devel@nongnu.org; Fri, 11 Aug 2023 11:08:45 -0400 Received: from smtp-out1.suse.de ([195.135.220.28]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1qUTkp-0006FO-RP for qemu-devel@nongnu.org; Fri, 11 Aug 2023 11:08:44 -0400 Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 0002521870; Fri, 11 Aug 2023 15:08:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1691766522; h=from:from:reply-to: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=2U70nrbKPKQlvdKn3PLPV7kvKLVHMvBT1WZo0dV9/p0=; b=GnhZbBqYjdSY7NjhUkVQ5WgJbIlqWxmeQAELcr+y10gWqwuZD9RTPfvBJO940sNMPsCoP9 VboM+ZRMj3O5AJtyQopRt0I91+8+Dim4VcsQX9Jy68IxiC/QwRILeia97XZGd0zq10QQkN +j/2Yb/5bDh4sNwyACBxm03vwBa/WCo= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1691766522; h=from:from:reply-to: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=2U70nrbKPKQlvdKn3PLPV7kvKLVHMvBT1WZo0dV9/p0=; b=ji00aX4MyPha2WJpgLS1Ee9FgOjr+SmD/wdgTNEEkrrPkXzb7jbtmq3AakykpTpDULFbSX XKbHy03dgNMUoeBw== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 6B63E13592; Fri, 11 Aug 2023 15:08:40 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id 4O2hDfhO1mS7KwAAMHmgww (envelope-from ); Fri, 11 Aug 2023 15:08:40 +0000 From: Fabiano Rosas To: qemu-devel@nongnu.org Cc: Juan Quintela , Peter Xu , Wei Wang , Leonardo Bras Subject: [PATCH v3 01/10] migration: Fix possible race when setting rp_state.error Date: Fri, 11 Aug 2023 12:08:27 -0300 Message-Id: <20230811150836.2895-2-farosas@suse.de> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20230811150836.2895-1-farosas@suse.de> References: <20230811150836.2895-1-farosas@suse.de> MIME-Version: 1.0 Received-SPF: pass client-ip=195.135.220.28; envelope-from=farosas@suse.de; helo=smtp-out1.suse.de X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org We don't need to set the rp_state.error right after a shutdown because qemu_file_shutdown() always sets the QEMUFile error, so the return path thread would have seen it and set the rp error itself. Setting the error outside of the thread is also racy because the thread could clear it after we set it. Signed-off-by: Fabiano Rosas Reviewed-by: Peter Xu --- migration/migration.c | 1 - 1 file changed, 1 deletion(-) diff --git a/migration/migration.c b/migration/migration.c index 5528acb65e..f88c86079c 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -2062,7 +2062,6 @@ static int await_return_path_close_on_source(MigrationState *ms) * waiting for the destination. */ qemu_file_shutdown(ms->rp_state.from_dst_file); - mark_source_rp_bad(ms); } trace_await_return_path_close_on_source_joining(); qemu_thread_join(&ms->rp_state.rp_thread);