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[Qemu-devel] [RFC PATCH 03/23] Use cpu_physical_memory_set_dirty_range()
From: |
Yoshiaki Tamura |
Subject: |
[Qemu-devel] [RFC PATCH 03/23] Use cpu_physical_memory_set_dirty_range() to update phys_ram_dirty. |
Date: |
Tue, 25 May 2010 17:36:44 +0900 |
Modifies kvm_get_dirty_pages_log_range to use
cpu_physical_memory_set_dirty_range() to update the row of the
bit-based phys_ram_dirty bitmap at once.
Signed-off-by: Yoshiaki Tamura <address@hidden>
Signed-off-by: OHMURA Kei <address@hidden>
---
qemu-kvm.c | 19 +++++++------------
1 files changed, 7 insertions(+), 12 deletions(-)
diff --git a/qemu-kvm.c b/qemu-kvm.c
index 29365a9..1414f49 100644
--- a/qemu-kvm.c
+++ b/qemu-kvm.c
@@ -2323,8 +2323,8 @@ static int kvm_get_dirty_pages_log_range(unsigned long
start_addr,
unsigned long offset,
unsigned long mem_size)
{
- unsigned int i, j;
- unsigned long page_number, addr, addr1, c;
+ unsigned int i;
+ unsigned long page_number, addr, addr1;
ram_addr_t ram_addr;
unsigned int len = ((mem_size / TARGET_PAGE_SIZE) + HOST_LONG_BITS - 1) /
HOST_LONG_BITS;
@@ -2335,16 +2335,11 @@ static int kvm_get_dirty_pages_log_range(unsigned long
start_addr,
*/
for (i = 0; i < len; i++) {
if (bitmap[i] != 0) {
- c = leul_to_cpu(bitmap[i]);
- do {
- j = ffsl(c) - 1;
- c &= ~(1ul << j);
- page_number = i * HOST_LONG_BITS + j;
- addr1 = page_number * TARGET_PAGE_SIZE;
- addr = offset + addr1;
- ram_addr = cpu_get_physical_page_desc(addr);
- cpu_physical_memory_set_dirty(ram_addr);
- } while (c != 0);
+ page_number = i * HOST_LONG_BITS;
+ addr1 = page_number * TARGET_PAGE_SIZE;
+ addr = offset + addr1;
+ ram_addr = cpu_get_physical_page_desc(addr);
+ cpu_physical_memory_set_dirty_range(ram_addr,
leul_to_cpu(bitmap[i]));
}
}
return 0;
--
1.7.0.31.g1df487
- [Qemu-devel] [RFC PATCH 10/23] Introduce util functions to control ft_transaction from savevm layer., (continued)
- [Qemu-devel] [RFC PATCH 10/23] Introduce util functions to control ft_transaction from savevm layer., Yoshiaki Tamura, 2010/05/25
- [Qemu-devel] [RFC PATCH 19/23] Introduce ft_tranx_ready(), and modify migrate_fd_put_ready() when ft_mode is on., Yoshiaki Tamura, 2010/05/25
- [Qemu-devel] [RFC PATCH 22/23] Introduce -k option to enable FT migration mode (Kemari)., Yoshiaki Tamura, 2010/05/25
- [Qemu-devel] [RFC PATCH 21/23] virtio-blk: Modify save/load handler to handle inuse varialble., Yoshiaki Tamura, 2010/05/25
- [Qemu-devel] [RFC PATCH 08/23] Introduce some socket util functions., Yoshiaki Tamura, 2010/05/25
- [Qemu-devel] [RFC PATCH 04/23] Use cpu_physical_memory_get_dirty_range() to check multiple dirty pages., Yoshiaki Tamura, 2010/05/25
- [Qemu-devel] [RFC PATCH 20/23] Modify tcp_accept_incoming_migration() to handle ft_mode, and add a hack not to close fd when ft_mode is enabled., Yoshiaki Tamura, 2010/05/25
- [Qemu-devel] [RFC PATCH 23/23] Add a parser to accept FT migration incoming mode., Yoshiaki Tamura, 2010/05/25
- [Qemu-devel] [RFC PATCH 07/23] Introduce skip_header parameter to qemu_loadvm_state()., Yoshiaki Tamura, 2010/05/25
- [Qemu-devel] [RFC PATCH 12/23] Insent event-tap callbacks to net/block layer., Yoshiaki Tamura, 2010/05/25
- [Qemu-devel] [RFC PATCH 03/23] Use cpu_physical_memory_set_dirty_range() to update phys_ram_dirty.,
Yoshiaki Tamura <=
- [Qemu-devel] [RFC PATCH 06/23] Introduce read() to FdMigrationState., Yoshiaki Tamura, 2010/05/25
- [Qemu-devel] [RFC PATCH 18/23] Call event_tap_replay() at vm_start()., Yoshiaki Tamura, 2010/05/25
- [Qemu-devel] [RFC PATCH 11/23] Introduce qemu_savevm_state_all()., Yoshiaki Tamura, 2010/05/25
- [Qemu-devel] [RFC PATCH 13/23] Introduce event-tap., Yoshiaki Tamura, 2010/05/25
- [Qemu-devel] [RFC PATCH 17/23] Skip assert() when event_tap_state weren't EVENT_TAP_OFF., Yoshiaki Tamura, 2010/05/25
- [Qemu-devel] [RFC PATCH 05/23] Make QEMUFile buf expandable, and introduce qemu_realloc_buffer() and qemu_clear_buffer()., Yoshiaki Tamura, 2010/05/25
- [Qemu-devel] [RFC PATCH 00/23] Kemari for KVM v0.1.1, Yoshiaki Tamura, 2010/05/25
- [Qemu-devel] [RFC PATCH 01/23] Modify DIRTY_FLAG value and introduce DIRTY_IDX to use as indexes of bit-based phys_ram_dirty., Yoshiaki Tamura, 2010/05/25
- [Qemu-devel] [RFC PATCH 02/23] Introduce cpu_physical_memory_get_dirty_range()., Yoshiaki Tamura, 2010/05/25
- [Qemu-devel] [RFC PATCH 09/23] Introduce fault tolerant VM transaction QEMUFile and ft_mode., Yoshiaki Tamura, 2010/05/25