search for: blk_queue_max_hw_sectors_no_limit

Hi, For virtio block device, actually there is no a hard limit for max request size, and virtio_blk driver set -1 to blk_queue_max_hw_sectors(q, -1U);. But it doesn't work, because there is a default upper limitation BLK_DEF_MAX_SECTORS (1280 sectors). So this series want to add a new helper blk_queue_max_hw_sectors_no_limit to set a proper max reqeust size. Weiping Zhang (2): blk-setting: add new helper blk_queue_max_hw_sectors_no_limit virtio_blk: add new module parameter to set max request size block/blk-settings.c | 20 ++++++++++++++++++++ drivers/block/virtio_blk.c | 32 ++++++++++++++++++++++++++++++...

Hi, For virtio block device, actually there is no a hard limit for max request size, and virtio_blk driver set -1 to blk_queue_max_hw_sectors(q, -1U);. But it doesn't work, because there is a default upper limitation BLK_DEF_MAX_SECTORS (1280 sectors). So this series want to add a new helper blk_queue_max_hw_sectors_no_limit to set a proper max reqeust size. Weiping Zhang (2): blk-setting: add new helper blk_queue_max_hw_sectors_no_limit virtio_blk: add new module parameter to set max request size block/blk-settings.c | 20 ++++++++++++++++++++ drivers/block/virtio_blk.c | 32 ++++++++++++++++++++++++++++++...

...ock device, actually there is no a hard limit for max request > size, and virtio_blk driver set -1 to blk_queue_max_hw_sectors(q, -1U);. > But it doesn't work, because there is a default upper limitation > BLK_DEF_MAX_SECTORS (1280 sectors). So this series want to add a new helper > blk_queue_max_hw_sectors_no_limit to set a proper max reqeust size. > > Weiping Zhang (2): > blk-setting: add new helper blk_queue_max_hw_sectors_no_limit > virtio_blk: add new module parameter to set max request size > > block/blk-settings.c | 20 ++++++++++++++++++++ > drivers/block/virtio_blk.c...

...rtblk_probe(struct virtio_device *vdev) /* We can handle whatever the host told us to handle. */ blk_queue_max_segments(q, vblk->sg_elems-2); - /* No real sector limit. */ - blk_queue_max_hw_sectors(q, -1U); + /* No real sector limit, use 512b (max_request_size << 10) >> 9 */ + blk_queue_max_hw_sectors_no_limit(q, max_request_size << 1); /* Host can optionally specify maximum segment size and number of * segments. */ -- 2.9.4