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| author |   Rusty Russell <rusty@rustcorp.com.au> | 2008-12-30 09:26:04 -0600 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2008-12-30 09:26:05 +1030 |
| commit | 4b7f7e2049956f6e946ad56c1ee093e7bab74da9 (patch) | |
| tree | 23e307f720b8fd42465d5ec92da6b4205b6534a0 /drivers/block | |
| parent | virtio: avoid implicit use of Linux page size in balloon interface (diff) | |
| download | linux-dev-4b7f7e2049956f6e946ad56c1ee093e7bab74da9.tar.xz linux-dev-4b7f7e2049956f6e946ad56c1ee093e7bab74da9.zip | |
virtio: set max_segment_size and max_sectors to infinite.
Setting max_segment_size allows more than 64k per sg element, unless
the host specified a limit. Setting max_sectors indicates that our
max_hw_segments is the only limit.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/virtio_blk.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c index 85d79a02d487..0e2ade648aff 100644 --- a/drivers/block/virtio_blk.c +++ b/drivers/block/virtio_blk.c @@ -277,6 +277,9 @@ static int virtblk_probe(struct virtio_device *vdev) } set_capacity(vblk->disk, cap); + /* No real sector limit. */ + blk_queue_max_sectors(vblk->disk->queue, -1U); + /* Host can optionally specify maximum segment size and number of * segments. */ err = virtio_config_val(vdev, VIRTIO_BLK_F_SIZE_MAX, @@ -284,6 +287,8 @@ static int virtblk_probe(struct virtio_device *vdev) &v); if (!err) blk_queue_max_segment_size(vblk->disk->queue, v); + else + blk_queue_max_segment_size(vblk->disk->queue, -1UL); err = virtio_config_val(vdev, VIRTIO_BLK_F_SEG_MAX, offsetof(struct virtio_blk_config, seg_max), |