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[Qemu-devel] [v4 11/13] migration: Add interface to control compression
From: |
Liang Li |
Subject: |
[Qemu-devel] [v4 11/13] migration: Add interface to control compression |
Date: |
Mon, 2 Feb 2015 19:05:47 +0800 |
The multiple compression threads can be turned on/off through
qmp and hmp interface before doing live migration.
Signed-off-by: Liang Li <address@hidden>
Signed-off-by: Yang Zhang <address@hidden>
Reviewed-by: Dr.David Alan Gilbert <address@hidden>
---
migration/migration.c | 7 +++++--
qapi-schema.json | 7 ++++++-
2 files changed, 11 insertions(+), 3 deletions(-)
diff --git a/migration/migration.c b/migration/migration.c
index a6f6e02..cbbd455 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -588,8 +588,11 @@ bool migrate_zero_blocks(void)
bool migrate_use_compression(void)
{
- /* Disable compression before the patch series are applied */
- return false;
+ MigrationState *s;
+
+ s = migrate_get_current();
+
+ return s->enabled_capabilities[MIGRATION_CAPABILITY_COMPRESS];
}
int migrate_compress_level(void)
diff --git a/qapi-schema.json b/qapi-schema.json
index e16f8eb..0dfc4ce 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -491,13 +491,18 @@
# to enable the capability on the source VM. The feature is disabled
by
# default. (since 1.6)
#
+# @compress: Use multiple compression threads to accelerate live migration.
+# This feature can help to reduce the migration traffic, by sending
+# compressed pages. The feature is disabled by default. (since 2.3)
+#
# @auto-converge: If enabled, QEMU will automatically throttle down the guest
# to speed up convergence of RAM migration. (since 1.6)
#
# Since: 1.2
##
{ 'enum': 'MigrationCapability',
- 'data': ['xbzrle', 'rdma-pin-all', 'auto-converge', 'zero-blocks'] }
+ 'data': ['xbzrle', 'rdma-pin-all', 'auto-converge', 'zero-blocks',
+ 'compress'] }
##
# @MigrationCapabilityStatus
--
1.9.1
- [Qemu-devel] [v4 05/13] arch_init: Alloc and free data struct for compression, (continued)
- [Qemu-devel] [v4 05/13] arch_init: Alloc and free data struct for compression, Liang Li, 2015/02/02
- [Qemu-devel] [v4 07/13] migration: Split the function ram_save_page, Liang Li, 2015/02/02
- [Qemu-devel] [v4 08/13] migration: Add the core code of multi-thread compression, Liang Li, 2015/02/02
- [Qemu-devel] [v4 09/13] migration: Make compression co-work with xbzrle, Liang Li, 2015/02/02
- [Qemu-devel] [v4 10/13] migration: Add the core code for decompression, Liang Li, 2015/02/02
- [Qemu-devel] [v4 11/13] migration: Add interface to control compression,
Liang Li <=
- [Qemu-devel] [v4 06/13] arch_init: Add and free data struct for decompression, Liang Li, 2015/02/02
- [Qemu-devel] [v4 13/13] migration: Add command to query migration parameter, Liang Li, 2015/02/02
- [Qemu-devel] [v4 02/13] migration: Add the framework of multi-thread compression, Liang Li, 2015/02/02
- [Qemu-devel] [v4 12/13] migration: Add command to set migration parameter, Liang Li, 2015/02/02