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Wed, 11 Oct 2023 18:46:17 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id uC+qNnntJmU1bQAAMHmgww (envelope-from ); Wed, 11 Oct 2023 18:46:17 +0000 From: Fabiano Rosas To: qemu-devel@nongnu.org Cc: Juan Quintela , Peter Xu , Leonardo Bras Subject: [PATCH RESEND 6/7] migration/ram: Merge save_zero_page functions Date: Wed, 11 Oct 2023 15:46:03 -0300 Message-Id: <20231011184604.32364-7-farosas@suse.de> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20231011184604.32364-1-farosas@suse.de> References: <20231011184604.32364-1-farosas@suse.de> MIME-Version: 1.0 Authentication-Results: smtp-out1.suse.de; none X-Spam-Score: 3.90 X-Spamd-Result: default: False [3.90 / 50.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[4]; TO_DN_SOME(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; R_MISSING_CHARSET(2.50)[]; BROKEN_CONTENT_TYPE(1.50)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-1.00)[-1.000]; MID_CONTAINS_FROM(1.00)[]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[]; BAYES_HAM(-0.00)[29.56%] Received-SPF: pass client-ip=2001:67c:2178:6::1c; 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 do this in two pieces. One single function makes it easier to grasp, specially since it removes the indirection on the return value handling. Reviewed-by: Peter Xu Signed-off-by: Fabiano Rosas --- migration/ram.c | 46 +++++++++++++--------------------------------- 1 file changed, 13 insertions(+), 33 deletions(-) diff --git a/migration/ram.c b/migration/ram.c index 1177563523..24c249f944 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -1136,32 +1136,6 @@ void ram_release_page(const char *rbname, uint64_t offset) ram_discard_range(rbname, offset, TARGET_PAGE_SIZE); } -/** - * save_zero_page_to_file: send the zero page to the file - * - * Returns the size of data written to the file, 0 means the page is not - * a zero page - * - * @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_to_file(PageSearchStatus *pss, RAMBlock *block, - ram_addr_t offset) -{ - uint8_t *p = block->host + offset; - QEMUFile *file = pss->pss_channel; - int len = 0; - - if (buffer_is_zero(p, TARGET_PAGE_SIZE)) { - len += save_page_header(pss, file, block, offset | RAM_SAVE_FLAG_ZERO); - qemu_put_byte(file, 0); - len += 1; - ram_release_page(block->idstr, offset); - } - return len; -} - /** * save_zero_page: send the zero page to the stream * @@ -1175,12 +1149,19 @@ static int save_zero_page_to_file(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); + uint8_t *p = block->host + offset; + QEMUFile *file = pss->pss_channel; + int len = 0; - if (!len) { - return -1; + if (!buffer_is_zero(p, TARGET_PAGE_SIZE)) { + return 0; } + len += save_page_header(pss, file, block, offset | RAM_SAVE_FLAG_ZERO); + qemu_put_byte(file, 0); + len += 1; + ram_release_page(block->idstr, offset); + stat64_add(&mig_stats.zero_pages, 1); ram_transferred_add(len); @@ -1194,7 +1175,7 @@ static int save_zero_page(RAMState *rs, PageSearchStatus *pss, RAMBlock *block, XBZRLE_cache_unlock(); } - return 1; + return len; } /* @@ -2150,9 +2131,8 @@ static int ram_save_target_page_legacy(RAMState *rs, PageSearchStatus *pss) return 1; } - res = save_zero_page(rs, pss, block, offset); - if (res > 0) { - return res; + if (save_zero_page(rs, pss, block, offset)) { + return 1; } /*