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[Qemu-devel] [PATCH 14/38] memory: only resize dirty bitmap when memory
From: |
Juan Quintela |
Subject: |
[Qemu-devel] [PATCH 14/38] memory: only resize dirty bitmap when memory size increases |
Date: |
Tue, 17 Dec 2013 16:25:50 +0100 |
Signed-off-by: Juan Quintela <address@hidden>
Reviewed-by: Eric Blake <address@hidden>
---
exec.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/exec.c b/exec.c
index 9996da2..bed5c07 100644
--- a/exec.c
+++ b/exec.c
@@ -1210,6 +1210,9 @@ ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void
*host,
MemoryRegion *mr)
{
RAMBlock *block, *new_block;
+ ram_addr_t old_ram_size, new_ram_size;
+
+ old_ram_size = last_ram_offset() >> TARGET_PAGE_BITS;
size = TARGET_PAGE_ALIGN(size);
new_block = g_malloc0(sizeof(*new_block));
@@ -1270,10 +1273,13 @@ ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size,
void *host,
ram_list.version++;
qemu_mutex_unlock_ramlist();
- ram_list.phys_dirty = g_realloc(ram_list.phys_dirty,
- last_ram_offset() >> TARGET_PAGE_BITS);
- memset(ram_list.phys_dirty + (new_block->offset >> TARGET_PAGE_BITS),
+ new_ram_size = last_ram_offset() >> TARGET_PAGE_BITS;
+
+ if (new_ram_size > old_ram_size) {
+ ram_list.phys_dirty = g_realloc(ram_list.phys_dirty, new_ram_size);
+ memset(ram_list.phys_dirty + (new_block->offset >> TARGET_PAGE_BITS),
0, size >> TARGET_PAGE_BITS);
+ }
cpu_physical_memory_set_dirty_range(new_block->offset, size);
qemu_ram_setup_dump(new_block->host, size);
--
1.8.3.1
- [Qemu-devel] [PATCH 09/38] memory: set single dirty flags when possible, (continued)
- [Qemu-devel] [PATCH 09/38] memory: set single dirty flags when possible, Juan Quintela, 2013/12/17
- [Qemu-devel] [PATCH 10/38] memory: cpu_physical_memory_set_dirty_range() always dirty all flags, Juan Quintela, 2013/12/17
- [Qemu-devel] [PATCH 12/38] memory: use bit 2 for migration, Juan Quintela, 2013/12/17
- [Qemu-devel] [PATCH 13/38] memory: make sure that client is always inside range, Juan Quintela, 2013/12/17
- [Qemu-devel] [PATCH 11/38] memory: cpu_physical_memory_mask_dirty_range() always clears a single flag, Juan Quintela, 2013/12/17
- [Qemu-devel] [PATCH 14/38] memory: only resize dirty bitmap when memory size increases,
Juan Quintela <=
- [Qemu-devel] [PATCH 15/38] memory: cpu_physical_memory_clear_dirty_flag() result is never used, Juan Quintela, 2013/12/17
- [Qemu-devel] [PATCH 16/38] bitmap: Add bitmap_zero_extend operation, Juan Quintela, 2013/12/17
- [Qemu-devel] [PATCH 17/38] memory: split dirty bitmap into three, Juan Quintela, 2013/12/17
- [Qemu-devel] [PATCH 19/38] memory: unfold cpu_physical_memory_set_dirty() in its only user, Juan Quintela, 2013/12/17
- [Qemu-devel] [PATCH 18/38] memory: unfold cpu_physical_memory_clear_dirty_flag() in its only user, Juan Quintela, 2013/12/17