From patchwork Tue Aug 15 14:38:26 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fabiano Rosas X-Patchwork-Id: 1821394 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=BU390eNR; dkim=pass header.d=suse.de header.i=@suse.de header.a=ed25519-sha256 header.s=susede2_ed25519 header.b=dDSdpkdF; 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 4RQDSB4BYyz1yf2 for ; Wed, 16 Aug 2023 00:39:38 +1000 (AEST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qVvBx-0008PI-Hd; Tue, 15 Aug 2023 10:38:41 -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 1qVvBw-0008Oq-Hx for qemu-devel@nongnu.org; Tue, 15 Aug 2023 10:38:40 -0400 Received: from smtp-out2.suse.de ([2001:67c:2178:6::1d]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1qVvBu-0002v3-Cm for qemu-devel@nongnu.org; Tue, 15 Aug 2023 10:38:40 -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-out2.suse.de (Postfix) with ESMTPS id 33EBD1F8D5; Tue, 15 Aug 2023 14:38:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1692110317; 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=3TGNvFSN3arnMJzpKDeKRoct5I/nrN/BDfvwsKDsORY=; b=BU390eNRulT+VcKd5qn7I3xMjn/gciQl+chswbjFLThI7nn9xD0K1ehlts/ZjSr+jfabrY nfV76cpxBCaU9QvFtOX7tThF7h4lDrnNXTqmYi8UpQfGZ5szl0BXJMDIQgnA6fg1FiXghG wy5Y5FTTNv8YOtv08tp9FOhJQYqwtKg= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1692110317; 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=3TGNvFSN3arnMJzpKDeKRoct5I/nrN/BDfvwsKDsORY=; b=dDSdpkdF8N3pYTjL1AoE3TE2JByvFBWHQVzX+ke396obcWCAQKEjSZsdBNP7XQ6/k9sMU1 Hg7kXmLpo76d7oBQ== 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 D97BF13909; Tue, 15 Aug 2023 14:38:35 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id uGV4KOuN22T0WQAAMHmgww (envelope-from ); Tue, 15 Aug 2023 14:38:35 +0000 From: Fabiano Rosas To: qemu-devel@nongnu.org Cc: Juan Quintela , Peter Xu , Leonardo Bras Subject: [PATCH 3/5] migration/ram: Move xbzrle zero page handling into save_zero_page Date: Tue, 15 Aug 2023 11:38:26 -0300 Message-Id: <20230815143828.15436-4-farosas@suse.de> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20230815143828.15436-1-farosas@suse.de> References: <20230815143828.15436-1-farosas@suse.de> MIME-Version: 1.0 Received-SPF: pass client-ip=2001:67c:2178:6::1d; envelope-from=farosas@suse.de; helo=smtp-out2.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 It makes a bit more sense to have the zero page handling of xbzrle right where we save the zero page. This also makes save_zero_page() follow the same format as save_compress_page() at the top level of ram_save_target_page_legacy(). Signed-off-by: Fabiano Rosas Reviewed-by: Peter Xu --- migration/ram.c | 27 +++++++++++++++------------ 1 file changed, 15 insertions(+), 12 deletions(-) diff --git a/migration/ram.c b/migration/ram.c index 761f43dc34..a10410a1a5 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -1159,11 +1159,12 @@ static int save_zero_page_to_file(PageSearchStatus *pss, RAMBlock *block, * * Returns the number of pages written. * + * @rs: current RAM state * @pss: current PSS channel * @block: block that contains the page we want to send * @offset: offset inside the block for the page */ -static int save_zero_page(PageSearchStatus *pss, RAMBlock *block, +static int save_zero_page(RAMState *rs, PageSearchStatus *pss, RAMBlock *block, ram_addr_t offset) { int len = save_zero_page_to_file(pss, block, offset); @@ -1171,6 +1172,17 @@ static int save_zero_page(PageSearchStatus *pss, RAMBlock *block, if (len) { stat64_add(&mig_stats.zero_pages, 1); ram_transferred_add(len); + + /* + * Must let xbzrle know, otherwise a previous (now 0'd) cached + * page would be stale. + */ + if (rs->xbzrle_started) { + XBZRLE_cache_lock(); + xbzrle_cache_zero_page(block->offset + offset); + XBZRLE_cache_unlock(); + } + return 1; } return -1; @@ -2141,17 +2153,8 @@ static int ram_save_target_page_legacy(RAMState *rs, PageSearchStatus *pss) return 1; } - res = save_zero_page(pss, block, offset); - if (res > 0) { - /* Must let xbzrle know, otherwise a previous (now 0'd) cached - * page would be stale - */ - if (rs->xbzrle_started) { - XBZRLE_cache_lock(); - xbzrle_cache_zero_page(block->offset + offset); - XBZRLE_cache_unlock(); - } - return res; + if (save_zero_page(rs, pss, block, offset)) { + return 1; } /*