5.15-stable review patch. If anyone has any objections, please let me know.
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From: Christoph Hellwig hch@lst.de
[ Upstream commit 9a9525de865410047fa962867b4fcd33943b206f ]
null_blk has some rather odd capping of the max_hw_sectors value to BLK_DEF_MAX_SECTORS, which doesn't make sense - max_hw_sector is the hardware limit, and BLK_DEF_MAX_SECTORS despite the confusing name is the default cap for the max_sectors field used for normal file system I/O.
Remove all the capping, and simply leave it to the block layer or user to take up or not all of that for file system I/O.
Fixes: ea17fd354ca8 ("null_blk: Allow controlling max_hw_sectors limit") Signed-off-by: Christoph Hellwig hch@lst.de Link: https://lore.kernel.org/r/20231227092305.279567-2-hch@lst.de Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/block/null_blk/main.c | 12 ++---------- 1 file changed, 2 insertions(+), 10 deletions(-)
diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c index 4a867233b14a..87791265e09b 100644 --- a/drivers/block/null_blk/main.c +++ b/drivers/block/null_blk/main.c @@ -1900,10 +1900,8 @@ static int null_add_dev(struct nullb_device *dev)
blk_queue_logical_block_size(nullb->q, dev->blocksize); blk_queue_physical_block_size(nullb->q, dev->blocksize); - if (!dev->max_sectors) - dev->max_sectors = queue_max_hw_sectors(nullb->q); - dev->max_sectors = min(dev->max_sectors, BLK_DEF_MAX_SECTORS); - blk_queue_max_hw_sectors(nullb->q, dev->max_sectors); + if (dev->max_sectors) + blk_queue_max_hw_sectors(nullb->q, dev->max_sectors);
if (dev->virt_boundary) blk_queue_virt_boundary(nullb->q, PAGE_SIZE - 1); @@ -1953,12 +1951,6 @@ static int __init null_init(void) g_bs = PAGE_SIZE; }
- if (g_max_sectors > BLK_DEF_MAX_SECTORS) { - pr_warn("invalid max sectors\n"); - pr_warn("defaults max sectors to %u\n", BLK_DEF_MAX_SECTORS); - g_max_sectors = BLK_DEF_MAX_SECTORS; - } - if (g_home_node != NUMA_NO_NODE && g_home_node >= nr_online_nodes) { pr_err("invalid home_node value\n"); g_home_node = NUMA_NO_NODE;