File boo1229062-re-enable-blk_queue_max_hw_sectors.p... of Package drbd

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File boo1229062-re-enable-blk_queue_max_hw_sectors.patch of Package drbd

diff -Nupr a/drbd/drbd_nl.c b/drbd/drbd_nl.c
--- a/drbd/drbd_nl.c	2024-08-12 15:03:18.458476462 +0800
+++ b/drbd/drbd_nl.c	2024-08-12 15:05:08.415670056 +0800
@@ -2017,6 +2017,55 @@ static void fixup_discard_support(struct
 	}
 }
 
+/**
+ * blk_queue_max_hw_sectors - set max sectors for a request for this queue
+ * @q:  the request queue for the device
+ * @max_hw_sectors:  max hardware sectors in the usual 512b unit
+ *
+ * Description:
+ *    Enables a low level driver to set a hard upper limit,
+ *    max_hw_sectors, on the size of requests.  max_hw_sectors is set by
+ *    the device driver based upon the capabilities of the I/O
+ *    controller.
+ *
+ *    max_dev_sectors is a hard limit imposed by the storage device for
+ *    READ/WRITE requests. It is set by the disk driver.
+ *
+ *    max_sectors is a soft limit imposed by the block layer for
+ *    filesystem type requests.  This value can be overridden on a
+ *    per-device basis in /sys/block/<device>/queue/max_sectors_kb.
+ *    The soft limit can not exceed max_hw_sectors.
+ **/
+static void blk_queue_max_hw_sectors(struct request_queue *q, unsigned int max_hw_sectors)
+{
+	struct queue_limits *limits = &q->limits;
+	unsigned int max_sectors;
+
+	if ((max_hw_sectors << 9) < PAGE_SIZE) {
+		max_hw_sectors = 1 << (PAGE_SHIFT - 9);
+		pr_info("%s: set to minimum %u\n", __func__, max_hw_sectors);
+	}
+
+	max_hw_sectors = round_down(max_hw_sectors,
+				    limits->logical_block_size >> SECTOR_SHIFT);
+	limits->max_hw_sectors = max_hw_sectors;
+
+	max_sectors = min_not_zero(max_hw_sectors, limits->max_dev_sectors);
+
+	if (limits->max_user_sectors)
+		max_sectors = min(max_sectors, limits->max_user_sectors);
+	else
+		max_sectors = min(max_sectors, BLK_DEF_MAX_SECTORS_CAP);
+
+	max_sectors = round_down(max_sectors,
+				 limits->logical_block_size >> SECTOR_SHIFT);
+	limits->max_sectors = max_sectors;
+
+	if (!q->disk)
+		return;
+	q->disk->bdi->io_pages = max_sectors >> (PAGE_SHIFT - 9);
+}
+
 void drbd_reconsider_queue_parameters(struct drbd_device *device, struct drbd_backing_dev *bdev)
 {
 	struct request_queue * const q = device->rq_queue;

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File boo1229062-re-enable-blk_queue_max_hw_sectors.patch of Package drbd

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