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a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1692110318; 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=toJxKUA5Dl8oTpfiH0/VZtwKHX39icaVQhUvfWCyR50=; b=O8qLObd0UEd2xASvtftrPLz1qHRHV3L7xqQGLveXeE5EwccbedSJhPl0CKEIlrXADqZ+Z7 LIlIUWmk7WZumECQ== From: Fabiano Rosas To: qemu-devel@nongnu.org Cc: Juan Quintela , Peter Xu , Leonardo Bras Subject: [PATCH 4/5] migration/ram: Return early from save_zero_page Date: Tue, 15 Aug 2023 11:38:27 -0300 Message-Id: <20230815143828.15436-5-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 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.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; 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @suse.de) X-ZM-MESSAGEID: 1692110378401100001 Content-Type: text/plain; charset="utf-8" Invert the first conditional so we return early when len =3D=3D 0. This is merely to make the next patch easier to read. Signed-off-by: Fabiano Rosas --- migration/ram.c | 29 +++++++++++++++-------------- 1 file changed, 15 insertions(+), 14 deletions(-) diff --git a/migration/ram.c b/migration/ram.c index a10410a1a5..8ec38f69e8 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -1169,23 +1169,24 @@ static int save_zero_page(RAMState *rs, PageSearchS= tatus *pss, RAMBlock *block, { int len =3D save_zero_page_to_file(pss, block, offset); =20 - if (len) { - stat64_add(&mig_stats.zero_pages, 1); - ram_transferred_add(len); + if (!len) { + return -1; + } =20 - /* - * 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(); - } + stat64_add(&mig_stats.zero_pages, 1); + ram_transferred_add(len); =20 - return 1; + /* + * 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; } =20 /* --=20 2.35.3