From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46834) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ecX0N-00042g-LO for qemu-devel@nongnu.org; Fri, 19 Jan 2018 08:46:52 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ecX0M-0003T6-Px for qemu-devel@nongnu.org; Fri, 19 Jan 2018 08:46:51 -0500 Received: from mail-pg0-x243.google.com ([2607:f8b0:400e:c05::243]:38425) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1ecX0M-0003RV-LQ for qemu-devel@nongnu.org; Fri, 19 Jan 2018 08:46:50 -0500 Received: by mail-pg0-x243.google.com with SMTP id y27so1469857pgc.5 for ; Fri, 19 Jan 2018 05:46:50 -0800 (PST) From: Zhang Chen Date: Fri, 19 Jan 2018 21:44:41 +0800 Message-Id: <1516369485-5374-13-git-send-email-zhangckid@gmail.com> In-Reply-To: <1516369485-5374-1-git-send-email-zhangckid@gmail.com> References: <1516369485-5374-1-git-send-email-zhangckid@gmail.com> Subject: [Qemu-devel] [PATCH V4 12/16] COLO: flush host dirty ram from cache List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Paolo Bonzini , zhanghailiang , Juan Quintela , "Dr . David Alan Gilbert" , Jason Wang , Eric Blake , Markus Armbruster , Zhang Chen , Li Zhijian From: zhanghailiang Don't need to flush all VM's ram from cache, only flush the dirty pages since last checkpoint Signed-off-by: Li Zhijian Signed-off-by: Zhang Chen Signed-off-by: zhanghailiang --- migration/ram.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/migration/ram.c b/migration/ram.c index faee086..7f9ce60 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -2680,6 +2680,7 @@ int colo_init_ram_cache(void) } ram_state = g_new0(RAMState, 1); ram_state->migration_dirty_pages = 0; + memory_global_dirty_log_start(); return 0; @@ -2700,10 +2701,12 @@ void colo_release_ram_cache(void) { RAMBlock *block; + memory_global_dirty_log_stop(); QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { g_free(block->bmap); block->bmap = NULL; } + rcu_read_lock(); QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { if (block->colo_cache) { @@ -2920,6 +2923,15 @@ static void colo_flush_ram_cache(void) void *src_host; unsigned long offset = 0; + memory_global_dirty_log_sync(); + qemu_mutex_lock(&ram_state->bitmap_mutex); + rcu_read_lock(); + RAMBLOCK_FOREACH(block) { + migration_bitmap_sync_range(ram_state, block, 0, block->used_length); + } + rcu_read_unlock(); + qemu_mutex_unlock(&ram_state->bitmap_mutex); + trace_colo_flush_ram_cache_begin(ram_state->migration_dirty_pages); rcu_read_lock(); block = QLIST_FIRST_RCU(&ram_list.blocks); -- 2.7.4