diff options
| author | Pavel Butsykin <pbutsykin@virtuozzo.com> | 2017-02-03 18:23:20 +0300 |
|---|---|---|
| committer | Dr. David Alan Gilbert <dgilbert@redhat.com> | 2017-02-13 17:27:13 +0000 |
| commit | 53f09a1076f5efbba7d751a8005e2fcf008606db (patch) | |
| tree | 1f4f0cd62537a1f1b50ca73fcba8fb3ee7a272d0 /include | |
| parent | 9eb14766102b7af5c3ab3d64cc85985bdaa544e2 (diff) | |
add 'release-ram' migrate capability
This feature frees the migrated memory on the source during postcopy-ram
migration. In the second step of postcopy-ram migration when the source vm
is put on pause we can free unnecessary memory. It will allow, in particular,
to start relaxing the memory stress on the source host in a load-balancing
scenario.
Signed-off-by: Pavel Butsykin <pbutsykin@virtuozzo.com>
Message-Id: <20170203152321.19739-3-pbutsykin@virtuozzo.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Manually merged in Pavel's 'migration: madvise error_report fixup!'
Diffstat (limited to 'include')
| -rw-r--r-- | include/migration/migration.h | 1 | ||||
| -rw-r--r-- | include/migration/qemu-file.h | 3 |
2 files changed, 3 insertions, 1 deletions
diff --git a/include/migration/migration.h b/include/migration/migration.h index 7528cc2fbc..b9b706a7e3 100644 --- a/include/migration/migration.h +++ b/include/migration/migration.h @@ -304,6 +304,7 @@ int migrate_add_blocker(Error *reason, Error **errp); */ void migrate_del_blocker(Error *reason); +bool migrate_release_ram(void); bool migrate_postcopy_ram(void); bool migrate_zero_blocks(void); diff --git a/include/migration/qemu-file.h b/include/migration/qemu-file.h index abedd466c9..0cd648a733 100644 --- a/include/migration/qemu-file.h +++ b/include/migration/qemu-file.h @@ -132,7 +132,8 @@ void qemu_put_byte(QEMUFile *f, int v); * put_buffer without copying the buffer. * The buffer should be available till it is sent asynchronously. */ -void qemu_put_buffer_async(QEMUFile *f, const uint8_t *buf, size_t size); +void qemu_put_buffer_async(QEMUFile *f, const uint8_t *buf, size_t size, + bool may_free); bool qemu_file_mode_is_not_valid(const char *mode); bool qemu_file_is_writable(QEMUFile *f); |