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| author | Andrey Gruzdev <andrey.gruzdev@virtuozzo.com> | 2021-01-29 13:14:06 +0300 |
|---|---|---|
| committer | Dr. David Alan Gilbert <dgilbert@redhat.com> | 2021-02-08 11:19:51 +0000 |
| commit | 8518278a6af589ccc401f06e35f171b1e6fae800 (patch) | |
| tree | b4875300b2f5d8595f56e9e4a0803f6dab5aa4f8 /migration/migration.h | |
| parent | 278e2f551a095b234de74dca9c214d5502a1f72c (diff) | |
| download | qemu-8518278a6af589ccc401f06e35f171b1e6fae800.zip qemu-8518278a6af589ccc401f06e35f171b1e6fae800.tar.gz qemu-8518278a6af589ccc401f06e35f171b1e6fae800.tar.bz2 | |
migration: implementation of background snapshot thread
Introducing implementation of 'background' snapshot thread
which in overall follows the logic of precopy migration
while internally utilizes completely different mechanism
to 'freeze' vmstate at the start of snapshot creation.
This mechanism is based on userfault_fd with wr-protection
support and is Linux-specific.
Signed-off-by: Andrey Gruzdev <andrey.gruzdev@virtuozzo.com>
Acked-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20210129101407.103458-5-andrey.gruzdev@virtuozzo.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Diffstat (limited to 'migration/migration.h')
| -rw-r--r-- | migration/migration.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/migration/migration.h b/migration/migration.h index f40338c..0723955 100644 --- a/migration/migration.h +++ b/migration/migration.h @@ -20,6 +20,7 @@ #include "qemu/thread.h" #include "qemu/coroutine_int.h" #include "io/channel.h" +#include "io/channel-buffer.h" #include "net/announce.h" #include "qom/object.h" @@ -147,8 +148,10 @@ struct MigrationState { /*< public >*/ QemuThread thread; + QEMUBH *vm_start_bh; QEMUBH *cleanup_bh; QEMUFile *to_dst_file; + QIOChannelBuffer *bioc; /* * Protects to_dst_file pointer. We need to make sure we won't * yield or hang during the critical section, since this lock will |