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| author | Fam Zheng <famz@redhat.com> | 2018-07-03 10:37:58 +0800 |
|---|---|---|
| committer | Jeff Cody <jcody@redhat.com> | 2018-07-02 23:23:45 -0400 |
| commit | 9ded4a0114968e98b41494fc035ba14f84cdf700 (patch) | |
| tree | 17ecd45ddb28747781507d8d5d8382b0560db60d /block/trace-events | |
| parent | dee12de89380483656072f775f5ef99f4426f966 (diff) | |
| download | qemu-9ded4a0114968e98b41494fc035ba14f84cdf700.zip qemu-9ded4a0114968e98b41494fc035ba14f84cdf700.tar.gz qemu-9ded4a0114968e98b41494fc035ba14f84cdf700.tar.bz2 | |
backup: Use copy offloading
The implementation is similar to the 'qemu-img convert'. In the
beginning of the job, offloaded copy is attempted. If it fails, further
I/O will go through the existing bounce buffer code path.
Then, as Kevin pointed out, both this and qemu-img convert can benefit
from a local check if one request fails because of, for example, the
offset is beyond EOF, but another may well be accepted by the protocol
layer. This will be implemented separately.
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-id: 20180703023758.14422-4-famz@redhat.com
Signed-off-by: Jeff Cody <jcody@redhat.com>
Diffstat (limited to 'block/trace-events')
| -rw-r--r-- | block/trace-events | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/block/trace-events b/block/trace-events index 2d59b53..c35287b 100644 --- a/block/trace-events +++ b/block/trace-events @@ -42,6 +42,7 @@ backup_do_cow_skip(void *job, int64_t start) "job %p start %"PRId64 backup_do_cow_process(void *job, int64_t start) "job %p start %"PRId64 backup_do_cow_read_fail(void *job, int64_t start, int ret) "job %p start %"PRId64" ret %d" backup_do_cow_write_fail(void *job, int64_t start, int ret) "job %p start %"PRId64" ret %d" +backup_do_cow_copy_range_fail(void *job, int64_t start, int ret) "job %p start %"PRId64" ret %d" # blockdev.c qmp_block_job_cancel(void *job) "job %p" |