mirror of
https://github.com/xemu-project/xemu.git
synced 2024-11-25 12:40:08 +00:00
0393031a16
This patch will reduce the downtime of VM for the initial process, Previously, we copied all these memory in preparing stage of COLO while we need to stop VM, which is a time-consuming process. Here we optimize it by a trick, back-up every page while in migration process while COLO is enabled, though it affects the speed of the migration, but it obviously reduce the downtime of back-up all SVM'S memory in COLO preparing stage. Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com> Message-Id: <20200224065414.36524-5-zhang.zhanghailiang@huawei.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> minor typo fixes
72 lines
2.9 KiB
C
72 lines
2.9 KiB
C
/*
|
|
* QEMU System Emulator
|
|
*
|
|
* Copyright (c) 2003-2008 Fabrice Bellard
|
|
* Copyright (c) 2011-2015 Red Hat Inc
|
|
*
|
|
* Authors:
|
|
* Juan Quintela <quintela@redhat.com>
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#ifndef QEMU_MIGRATION_RAM_H
|
|
#define QEMU_MIGRATION_RAM_H
|
|
|
|
#include "qapi/qapi-types-migration.h"
|
|
#include "exec/cpu-common.h"
|
|
#include "io/channel.h"
|
|
|
|
extern MigrationStats ram_counters;
|
|
extern XBZRLECacheStats xbzrle_counters;
|
|
extern CompressionStats compression_counters;
|
|
|
|
int xbzrle_cache_resize(int64_t new_size, Error **errp);
|
|
uint64_t ram_bytes_remaining(void);
|
|
uint64_t ram_bytes_total(void);
|
|
|
|
uint64_t ram_pagesize_summary(void);
|
|
int ram_save_queue_pages(const char *rbname, ram_addr_t start, ram_addr_t len);
|
|
void acct_update_position(QEMUFile *f, size_t size, bool zero);
|
|
void ram_debug_dump_bitmap(unsigned long *todump, bool expected,
|
|
unsigned long pages);
|
|
void ram_postcopy_migrated_memory_release(MigrationState *ms);
|
|
/* For outgoing discard bitmap */
|
|
int ram_postcopy_send_discard_bitmap(MigrationState *ms);
|
|
/* For incoming postcopy discard */
|
|
int ram_discard_range(const char *block_name, uint64_t start, size_t length);
|
|
int ram_postcopy_incoming_init(MigrationIncomingState *mis);
|
|
|
|
void ram_handle_compressed(void *host, uint8_t ch, uint64_t size);
|
|
|
|
int ramblock_recv_bitmap_test(RAMBlock *rb, void *host_addr);
|
|
bool ramblock_recv_bitmap_test_byte_offset(RAMBlock *rb, uint64_t byte_offset);
|
|
void ramblock_recv_bitmap_set(RAMBlock *rb, void *host_addr);
|
|
void ramblock_recv_bitmap_set_range(RAMBlock *rb, void *host_addr, size_t nr);
|
|
int64_t ramblock_recv_bitmap_send(QEMUFile *file,
|
|
const char *block_name);
|
|
int ram_dirty_bitmap_reload(MigrationState *s, RAMBlock *rb);
|
|
|
|
/* ram cache */
|
|
int colo_init_ram_cache(void);
|
|
void colo_release_ram_cache(void);
|
|
void colo_incoming_start_dirty_log(void);
|
|
|
|
#endif
|