From: Paolo Bonzini <pbonz...@redhat.com>
Outside the execution threads the normal, non-MRU-ized order of
the RAM blocks should always be enough. So manage two separate
lists, which will have separate locking rules.
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
Signed-off-by: Juan Quintela <quint...@redhat.com>
---
cpu-all.h | 4 +++-
exec.c | 16 +++++++++++-----
2 files changed, 14 insertions(+), 6 deletions(-)
diff --git a/cpu-all.h b/cpu-all.h
index db25f73..3e67019 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -487,8 +487,9 @@ typedef struct RAMBlock {
ram_addr_t offset;
ram_addr_t length;
uint32_t flags;
- char idstr[256];
+ QLIST_ENTRY(RAMBlock) next_mru;
QLIST_ENTRY(RAMBlock) next;
+ char idstr[256];
#if defined(__linux__) && !defined(TARGET_S390X)
int fd;
#endif
@@ -496,6 +497,7 @@ typedef struct RAMBlock {
typedef struct RAMList {
uint8_t *phys_dirty;
+ QLIST_HEAD(, RAMBlock) blocks_mru;
QLIST_HEAD(, RAMBlock) blocks;
} RAMList;
extern RAMList ram_list;
diff --git a/exec.c b/exec.c
index ad2cc2e..0db2beb 100644
--- a/exec.c
+++ b/exec.c
@@ -112,7 +112,10 @@ static uint8_t *code_gen_ptr;
int phys_ram_fd;
static int in_migration;
-RAMList ram_list = { .blocks = QLIST_HEAD_INITIALIZER(ram_list.blocks) };
+RAMList ram_list = {
+ .blocks = QLIST_HEAD_INITIALIZER(ram_list.blocks),
+ .blocks_mru = QLIST_HEAD_INITIALIZER(ram_list.blocks_mru)
+};
static MemoryRegion *system_memory;
static MemoryRegion *system_io;
@@ -2578,6 +2581,7 @@ ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void
*host,
new_block->length = size;
QLIST_INSERT_HEAD(&ram_list.blocks, new_block, next);
+ QLIST_INSERT_HEAD(&ram_list.blocks_mru, new_block, next_mru);
ram_list.phys_dirty = g_realloc(ram_list.phys_dirty,
last_ram_offset() >> TARGET_PAGE_BITS);
@@ -2605,6 +2609,7 @@ void qemu_ram_free_from_ptr(ram_addr_t addr)
QLIST_FOREACH(block, &ram_list.blocks, next) {
if (addr == block->offset) {
QLIST_REMOVE(block, next);
+ QLIST_REMOVE(block, next_mru);
g_free(block);
return;
}
@@ -2618,6 +2623,7 @@ void qemu_ram_free(ram_addr_t addr)
QLIST_FOREACH(block, &ram_list.blocks, next) {
if (addr == block->offset) {
QLIST_REMOVE(block, next);
+ QLIST_REMOVE(block, next_mru);
if (block->flags & RAM_PREALLOC_MASK) {
;
} else if (mem_path) {
@@ -2723,12 +2729,12 @@ void *qemu_get_ram_ptr(ram_addr_t addr)
{
RAMBlock *block;
- QLIST_FOREACH(block, &ram_list.blocks, next) {
+ QLIST_FOREACH(block, &ram_list.blocks_mru, next_mru) {
if (addr - block->offset < block->length) {
/* Move this entry to to start of the list. */
if (block != QLIST_FIRST(&ram_list.blocks)) {
- QLIST_REMOVE(block, next);
- QLIST_INSERT_HEAD(&ram_list.blocks, block, next);
+ QLIST_REMOVE(block, next_mru);
+ QLIST_INSERT_HEAD(&ram_list.blocks_mru, block, next_mru);
}
if (xen_enabled()) {
/* We need to check if the requested address is in the RAM
@@ -2823,7 +2829,7 @@ int qemu_ram_addr_from_host(void *ptr, ram_addr_t
*ram_addr)
return 0;
}
- QLIST_FOREACH(block, &ram_list.blocks, next) {
+ QLIST_FOREACH(block, &ram_list.blocks_mru, next_mru) {
/* This case append when the block is not mapped. */
if (block->host == NULL) {
continue;
--
1.7.11.4
