diff options
| author | Eric Blake <eblake@redhat.com> | 2016-05-06 10:26:33 -0600 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2016-05-12 15:22:09 +0200 |
| commit | b5772fdde40a8200fc20db4d5da672f1ce149d68 (patch) | |
| tree | 23732e1413f0f03ca8054d1b72678e279a6811ae | |
| parent | 03c90063ccf5fd18b01448a8b23923769ab2ee21 (diff) | |
virtio: Switch to byte-based aio block access
Sector-based blk_aio_readv() and blk_aio_writev() should die; switch
to byte-based blk_aio_preadv() and blk_aio_pwritev() instead.
The trace is modified at the same time, and nb_sectors is now
unused. Fix a comment typo while in the vicinity.
Signed-off-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
| -rw-r--r-- | hw/block/virtio-blk.c | 18 | ||||
| -rw-r--r-- | trace-events | 2 |
2 files changed, 9 insertions, 11 deletions
diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c index 3f88f8cf59..284e64667c 100644 --- a/hw/block/virtio-blk.c +++ b/hw/block/virtio-blk.c @@ -322,7 +322,6 @@ static inline void submit_requests(BlockBackend *blk, MultiReqBuffer *mrb, { QEMUIOVector *qiov = &mrb->reqs[start]->qiov; int64_t sector_num = mrb->reqs[start]->sector_num; - int nb_sectors = mrb->reqs[start]->qiov.size / BDRV_SECTOR_SIZE; bool is_write = mrb->is_write; if (num_reqs > 1) { @@ -331,7 +330,7 @@ static inline void submit_requests(BlockBackend *blk, MultiReqBuffer *mrb, int tmp_niov = qiov->niov; /* mrb->reqs[start]->qiov was initialized from external so we can't - * modifiy it here. We need to initialize it locally and then add the + * modify it here. We need to initialize it locally and then add the * external iovecs. */ qemu_iovec_init(qiov, niov); @@ -343,23 +342,22 @@ static inline void submit_requests(BlockBackend *blk, MultiReqBuffer *mrb, qemu_iovec_concat(qiov, &mrb->reqs[i]->qiov, 0, mrb->reqs[i]->qiov.size); mrb->reqs[i - 1]->mr_next = mrb->reqs[i]; - nb_sectors += mrb->reqs[i]->qiov.size / BDRV_SECTOR_SIZE; } - assert(nb_sectors == qiov->size / BDRV_SECTOR_SIZE); - trace_virtio_blk_submit_multireq(mrb, start, num_reqs, sector_num, - nb_sectors, is_write); + trace_virtio_blk_submit_multireq(mrb, start, num_reqs, + sector_num << BDRV_SECTOR_BITS, + qiov->size, is_write); block_acct_merge_done(blk_get_stats(blk), is_write ? BLOCK_ACCT_WRITE : BLOCK_ACCT_READ, num_reqs - 1); } if (is_write) { - blk_aio_writev(blk, sector_num, qiov, nb_sectors, - virtio_blk_rw_complete, mrb->reqs[start]); + blk_aio_pwritev(blk, sector_num << BDRV_SECTOR_BITS, qiov, 0, + virtio_blk_rw_complete, mrb->reqs[start]); } else { - blk_aio_readv(blk, sector_num, qiov, nb_sectors, - virtio_blk_rw_complete, mrb->reqs[start]); + blk_aio_preadv(blk, sector_num << BDRV_SECTOR_BITS, qiov, 0, + virtio_blk_rw_complete, mrb->reqs[start]); } } diff --git a/trace-events b/trace-events index b4acd2ad98..b588091b6c 100644 --- a/trace-events +++ b/trace-events @@ -118,7 +118,7 @@ virtio_blk_req_complete(void *req, int status) "req %p status %d" virtio_blk_rw_complete(void *req, int ret) "req %p ret %d" virtio_blk_handle_write(void *req, uint64_t sector, size_t nsectors) "req %p sector %"PRIu64" nsectors %zu" virtio_blk_handle_read(void *req, uint64_t sector, size_t nsectors) "req %p sector %"PRIu64" nsectors %zu" -virtio_blk_submit_multireq(void *mrb, int start, int num_reqs, uint64_t sector, size_t nsectors, bool is_write) "mrb %p start %d num_reqs %d sector %"PRIu64" nsectors %zu is_write %d" +virtio_blk_submit_multireq(void *mrb, int start, int num_reqs, uint64_t offset, size_t size, bool is_write) "mrb %p start %d num_reqs %d offset %"PRIu64" size %zu is_write %d" # hw/block/dataplane/virtio-blk.c virtio_blk_data_plane_start(void *s) "dataplane %p" |