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[Qemu-devel] [PATCH 26/49] memory: only resize dirty bitmap when memory
From: |
Juan Quintela |
Subject: |
[Qemu-devel] [PATCH 26/49] memory: only resize dirty bitmap when memory size increases |
Date: |
Mon, 13 Jan 2014 18:40:11 +0100 |
Signed-off-by: Juan Quintela <address@hidden>
Reviewed-by: Eric Blake <address@hidden>
Reviewed-by: Orit Wasserman <address@hidden>
---
exec.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/exec.c b/exec.c
index 82aca4a..db369dc 100644
--- a/exec.c
+++ b/exec.c
@@ -1211,6 +1211,9 @@ 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));
@@ -1271,10 +1274,13 @@ 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);
--
1.8.4.2
- [Qemu-devel] [PATCH 16/49] exec: use accessor function to know if memory is dirty, (continued)
- [Qemu-devel] [PATCH 16/49] exec: use accessor function to know if memory is dirty, Juan Quintela, 2014/01/13
- [Qemu-devel] [PATCH 17/49] memory: create function to set a single dirty bit, Juan Quintela, 2014/01/13
- [Qemu-devel] [PATCH 18/49] exec: create function to get a single dirty bit, Juan Quintela, 2014/01/13
- [Qemu-devel] [PATCH 20/49] memory: all users of cpu_physical_memory_get_dirty used only one flag, Juan Quintela, 2014/01/13
- [Qemu-devel] [PATCH 21/49] memory: set single dirty flags when possible, Juan Quintela, 2014/01/13
- [Qemu-devel] [PATCH 22/49] memory: cpu_physical_memory_set_dirty_range() always dirty all flags, Juan Quintela, 2014/01/13
- [Qemu-devel] [PATCH 19/49] memory: make cpu_physical_memory_is_dirty return bool, Juan Quintela, 2014/01/13
- [Qemu-devel] [PATCH 23/49] memory: cpu_physical_memory_mask_dirty_range() always clears a single flag, Juan Quintela, 2014/01/13
- [Qemu-devel] [PATCH 24/49] memory: use bit 2 for migration, Juan Quintela, 2014/01/13
- [Qemu-devel] [PATCH 25/49] memory: make sure that client is always inside range, Juan Quintela, 2014/01/13
- [Qemu-devel] [PATCH 26/49] memory: only resize dirty bitmap when memory size increases,
Juan Quintela <=
- [Qemu-devel] [PATCH 27/49] memory: cpu_physical_memory_clear_dirty_flag() result is never used, Juan Quintela, 2014/01/13
- [Qemu-devel] [PATCH 28/49] bitmap: Add bitmap_zero_extend operation, Juan Quintela, 2014/01/13
- [Qemu-devel] [PATCH 30/49] memory: unfold cpu_physical_memory_clear_dirty_flag() in its only user, Juan Quintela, 2014/01/13
- [Qemu-devel] [PATCH 31/49] memory: unfold cpu_physical_memory_set_dirty() in its only user, Juan Quintela, 2014/01/13
- [Qemu-devel] [PATCH 29/49] memory: split dirty bitmap into three, Juan Quintela, 2014/01/13
- [Qemu-devel] [PATCH 33/49] memory: make cpu_physical_memory_get_dirty() the main function, Juan Quintela, 2014/01/13
- [Qemu-devel] [PATCH 32/49] memory: unfold cpu_physical_memory_set_dirty_flag(), Juan Quintela, 2014/01/13
- [Qemu-devel] [PATCH 35/49] memory: s/mask/clear/ cpu_physical_memory_mask_dirty_range, Juan Quintela, 2014/01/13
- [Qemu-devel] [PATCH 34/49] memory: cpu_physical_memory_get_dirty() is used as returning a bool, Juan Quintela, 2014/01/13
- [Qemu-devel] [PATCH 36/49] memory: use find_next_bit() to find dirty bits, Juan Quintela, 2014/01/13