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| author | Dr. David Alan Gilbert <dgilbert@redhat.com> | 2015-12-16 11:47:37 +0000 |
|---|---|---|
| committer | Amit Shah <amit.shah@redhat.com> | 2016-01-13 16:02:37 +0530 |
| commit | 063e760a5f52d9b82946956e7046828b524727af (patch) | |
| tree | fe07070c23ec57213bad71cfdd91a3cd3a823e24 /migration/ram.c | |
| parent | 4addcd4fdc94c369f4cd54f8e03396ff26fce34d (diff) | |
| download | qemu-063e760a5f52d9b82946956e7046828b524727af.tar.gz qemu-063e760a5f52d9b82946956e7046828b524727af.tar.bz2 qemu-063e760a5f52d9b82946956e7046828b524727af.zip | |
Use qemu_get_buffer_in_place for xbzrle data
Avoid a data copy (if we're lucky) in the xbzrle code.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Message-Id: <1450266458-3178-6-git-send-email-dgilbert@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Diffstat (limited to 'migration/ram.c')
| -rw-r--r-- | migration/ram.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/migration/ram.c b/migration/ram.c index 102d1f2b14..994552c57b 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -2088,10 +2088,12 @@ static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host) { unsigned int xh_len; int xh_flags; + uint8_t *loaded_data; if (!xbzrle_decoded_buf) { xbzrle_decoded_buf = g_malloc(TARGET_PAGE_SIZE); } + loaded_data = xbzrle_decoded_buf; /* extract RLE header */ xh_flags = qemu_get_byte(f); @@ -2107,10 +2109,10 @@ static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host) return -1; } /* load data and decode */ - qemu_get_buffer(f, xbzrle_decoded_buf, xh_len); + qemu_get_buffer_in_place(f, &loaded_data, xh_len); /* decode RLE */ - if (xbzrle_decode_buffer(xbzrle_decoded_buf, xh_len, host, + if (xbzrle_decode_buffer(loaded_data, xh_len, host, TARGET_PAGE_SIZE) == -1) { error_report("Failed to load XBZRLE page - decode error!"); return -1; |