From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:56840) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VswY7-0002nq-Uj for qemu-devel@nongnu.org; Tue, 17 Dec 2013 10:27:13 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VswY1-00017F-W5 for qemu-devel@nongnu.org; Tue, 17 Dec 2013 10:27:07 -0500 Received: from mx1.redhat.com ([209.132.183.28]:32194) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VswY1-000170-Nn for qemu-devel@nongnu.org; Tue, 17 Dec 2013 10:27:01 -0500 Received: from int-mx01.intmail.prod.int.phx2.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id rBHFR07O031200 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Tue, 17 Dec 2013 10:27:01 -0500 From: Juan Quintela Date: Tue, 17 Dec 2013 16:26:13 +0100 Message-Id: <1387293974-24718-38-git-send-email-quintela@redhat.com> In-Reply-To: <1387293974-24718-1-git-send-email-quintela@redhat.com> References: <1387293974-24718-1-git-send-email-quintela@redhat.com> Subject: [Qemu-devel] [PATCH 37/38] migration: synchronize memory bitmap 64bits at a time List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org We use the old code if the bitmaps are not aligned Signed-off-by: Juan Quintela --- arch_init.c | 38 +++++++++++++++++++++++++++++--------- 1 file changed, 29 insertions(+), 9 deletions(-) diff --git a/arch_init.c b/arch_init.c index 2cd3d00..77912e7 100644 --- a/arch_init.c +++ b/arch_init.c @@ -50,6 +50,7 @@ #include "exec/cpu-all.h" #include "exec/ram_addr.h" #include "hw/acpi/acpi.h" +#include "qemu/host-utils.h" #ifdef DEBUG_ARCH_INIT #define DPRINTF(fmt, ...) \ @@ -376,15 +377,34 @@ static inline bool migration_bitmap_set_dirty(ram_addr_t addr) static void migration_bitmap_sync_range(ram_addr_t start, ram_addr_t length) { ram_addr_t addr; - - for (addr = 0; addr < length; addr += TARGET_PAGE_SIZE) { - if (cpu_physical_memory_get_dirty(start + addr, - TARGET_PAGE_SIZE, - DIRTY_MEMORY_MIGRATION)) { - cpu_physical_memory_reset_dirty(start + addr, - TARGET_PAGE_SIZE, - DIRTY_MEMORY_MIGRATION); - migration_bitmap_set_dirty(start + addr); + unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS); + + /* start address is aligned at the start of a word? */ + if (((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) { + int k; + int nr = BITS_TO_LONGS(length >> TARGET_PAGE_BITS); + unsigned long *src = ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION]; + + for (k = page; k < page + nr; k++) { + if (src[k]) { + unsigned long new_dirty; + new_dirty = ~migration_bitmap[k]; + migration_bitmap[k] |= src[k]; + new_dirty &= src[k]; + migration_dirty_pages += ctpopl(new_dirty); + src[k] = 0; + } + } + } else { + for (addr = 0; addr < length; addr += TARGET_PAGE_SIZE) { + if (cpu_physical_memory_get_dirty(start + addr, + TARGET_PAGE_SIZE, + DIRTY_MEMORY_MIGRATION)) { + cpu_physical_memory_reset_dirty(start + addr, + TARGET_PAGE_SIZE, + DIRTY_MEMORY_MIGRATION); + migration_bitmap_set_dirty(start + addr); + } } } } -- 1.8.3.1