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Thu, 7 May 2020 17:02:47 +0000 (UTC) Received: from dgilbert-t580.localhost (ovpn-114-224.ams2.redhat.com [10.36.114.224]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9F32210013BD; Thu, 7 May 2020 17:02:45 +0000 (UTC) From: "Dr. David Alan Gilbert (git)" To: qemu-devel@nongnu.org, david@redhat.com, zhukeqian1@huawei.com, maozhongyi@cmss.chinamobile.com, marcandre.lureau@redhat.com, pannengyuan@huawei.com, f4bug@amsat.org, wei.w.wang@intel.com, yi.y.sun@intel.com, quintela@redhat.com Subject: [PULL 08/12] migration/ram: Consolidate variable reset after placement in ram_load_postcopy() Date: Thu, 7 May 2020 18:02:07 +0100 Message-Id: <20200507170211.238283-9-dgilbert@redhat.com> In-Reply-To: <20200507170211.238283-1-dgilbert@redhat.com> References: <20200507170211.238283-1-dgilbert@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=207.211.31.120; envelope-from=dgilbert@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/07 03:56:18 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=0.001, 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_H2=-0.001, SPF_PASS=-0.001, T_HK_NAME_DR=0.01 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 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" From: David Hildenbrand Let's consolidate resetting the variables. Cc: "Dr. David Alan Gilbert" Cc: Juan Quintela Cc: Peter Xu Signed-off-by: David Hildenbrand Message-Id: <20200421085300.7734-10-david@redhat.com> Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Dr. David Alan Gilbert Fixup for context conflicts with 91ba442 --- migration/ram.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/migration/ram.c b/migration/ram.c index 52fc032b83..08eb382f53 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -3147,7 +3147,7 @@ static int ram_load_postcopy(QEMUFile *f) /* Temporary page that is later 'placed' */ void *postcopy_host_page = mis->postcopy_tmp_page; void *this_host = NULL; - bool all_zero = false; + bool all_zero = true; int target_pages = 0; while (!ret && !(flags & RAM_SAVE_FLAG_EOS)) { @@ -3174,7 +3174,6 @@ static int ram_load_postcopy(QEMUFile *f) addr &= TARGET_PAGE_MASK; trace_ram_load_postcopy_loop((uint64_t)addr, flags); - place_needed = false; if (flags & (RAM_SAVE_FLAG_ZERO | RAM_SAVE_FLAG_PAGE | RAM_SAVE_FLAG_COMPRESS_PAGE)) { block = ram_block_from_stream(f, flags); @@ -3199,9 +3198,7 @@ static int ram_load_postcopy(QEMUFile *f) */ page_buffer = postcopy_host_page + ((uintptr_t)host & (block->page_size - 1)); - /* If all TP are zero then we can optimise the place */ if (target_pages == 1) { - all_zero = true; this_host = (void *)QEMU_ALIGN_DOWN((uintptr_t)host, block->page_size); } else { @@ -3221,7 +3218,6 @@ static int ram_load_postcopy(QEMUFile *f) */ if (target_pages == (block->page_size / TARGET_PAGE_SIZE)) { place_needed = true; - target_pages = 0; } place_source = postcopy_host_page; } @@ -3303,6 +3299,10 @@ static int ram_load_postcopy(QEMUFile *f) ret = postcopy_place_page(mis, place_dest, place_source, block); } + place_needed = false; + target_pages = 0; + /* Assume we have a zero page until we detect something different */ + all_zero = true; } }