From 07e1f1362ec868bde3cd99d55541e572ae5aa300 Mon Sep 17 00:00:00 2001 From: Juan Quintela Date: Tue, 14 Jan 2014 15:07:37 +0100 Subject: [PATCH 26/40] memory: cpu_physical_memory_set_dirty_range() now uses bitmap operations RH-Author: Juan Quintela Message-id: <1389712071-23303-27-git-send-email-quintela@redhat.com> Patchwork-id: 56681 O-Subject: [RHEL7 qemu-kvm PATCH 26/40] memory: cpu_physical_memory_set_dirty_range() now uses bitmap operations Bugzilla: 997559 RH-Acked-by: Paolo Bonzini RH-Acked-by: Orit Wasserman RH-Acked-by: Dr. David Alan Gilbert (git) We were setting a range of bits, so use bitmap_set(). Note: xen has always been wrong, and should have used start instead of addr from the beginning. Signed-off-by: Juan Quintela Reviewed-by: Eric Blake Reviewed-by: Orit Wasserman (cherry picked from commit 5b9a3a5f77e3458af6c1bb0654ee0f32936a5594) Signed-off-by: Juan Quintela --- include/exec/memory-internal.h | 19 +++++++------------ 1 file changed, 7 insertions(+), 12 deletions(-) Signed-off-by: Miroslav Rezanina --- include/exec/memory-internal.h | 19 +++++++------------ 1 files changed, 7 insertions(+), 12 deletions(-) diff --git a/include/exec/memory-internal.h b/include/exec/memory-internal.h index 1eda526..9d32a5a 100644 --- a/include/exec/memory-internal.h +++ b/include/exec/memory-internal.h @@ -90,19 +90,14 @@ static inline void cpu_physical_memory_set_dirty_flag(ram_addr_t addr, static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start, ram_addr_t length) { - ram_addr_t addr, end; + unsigned long end, page; - end = TARGET_PAGE_ALIGN(start + length); - start &= TARGET_PAGE_MASK; - for (addr = start; addr < end; addr += TARGET_PAGE_SIZE) { - set_bit(addr >> TARGET_PAGE_BITS, - ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION]); - set_bit(addr >> TARGET_PAGE_BITS, - ram_list.dirty_memory[DIRTY_MEMORY_VGA]); - set_bit(addr >> TARGET_PAGE_BITS, - ram_list.dirty_memory[DIRTY_MEMORY_CODE]); - } - xen_modified_memory(addr, length); + end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS; + page = start >> TARGET_PAGE_BITS; + bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION], page, end - page); + bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_VGA], page, end - page); + bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_CODE], page, end - page); + xen_modified_memory(start, length); } static inline void cpu_physical_memory_clear_dirty_range(ram_addr_t start, -- 1.7.1