Try operation of linux-6.1.y in Ski with extra patch

See #3. Maybe fixes #3.

patches/linux-6.1.y/6259151c04d4e0085e00d2dcb471ebdd1778e72e.patch

@@ -0,0 +1,52 @@
+From 6259151c04d4e0085e00d2dcb471ebdd1778e72e Mon Sep 17 00:00:00 2001
+From: Bart Van Assche <[email protected]>
+Date: Thu, 9 May 2024 10:01:48 -0700
+Subject: [PATCH] block: Call .limit_depth() after .hctx has been set
+
+Call .limit_depth() after data->hctx has been set such that data->hctx can
+be used in .limit_depth() implementations.
+
+Cc: Christoph Hellwig <[email protected]>
+Cc: Damien Le Moal <[email protected]>
+Cc: Zhiguo Niu <[email protected]>
+Fixes: 07757588e507 ("block/mq-deadline: Reserve 25% of scheduler tags for synchronous requests")
+Signed-off-by: Bart Van Assche <[email protected]>
+Tested-by: Zhiguo Niu <[email protected]>
+Reviewed-by: Christoph Hellwig <[email protected]>
+Link: https://lore.kernel.org/r/[email protected]
+Signed-off-by: Jens Axboe <[email protected]>
+---
+ block/blk-mq.c | 12 ++++++------
+ 1 file changed, 6 insertions(+), 6 deletions(-)
+
+diff --git a/block/blk-mq.c b/block/blk-mq.c
+index fec2dea5c6e885..e3c3c0c21b5536 100644
+--- a/block/blk-mq.c
++++ b/block/blk-mq.c
+@@ -448,6 +448,10 @@ static struct request *__blk_mq_alloc_requests(struct blk_mq_alloc_data *data)
+ 	if (data->cmd_flags & REQ_NOWAIT)
+ 		data->flags |= BLK_MQ_REQ_NOWAIT;
+
++retry:
++	data->ctx = blk_mq_get_ctx(q);
++	data->hctx = blk_mq_map_queue(q, data->cmd_flags, data->ctx);
++
+ 	if (q->elevator) {
+ 		/*
+ 		 * All requests use scheduler tags when an I/O scheduler is
+@@ -469,13 +473,9 @@ static struct request *__blk_mq_alloc_requests(struct blk_mq_alloc_data *data)
+ 			if (ops->limit_depth)
+ 				ops->limit_depth(data->cmd_flags, data);
+ 		}
+-	}
+-
+-retry:
+-	data->ctx = blk_mq_get_ctx(q);
+-	data->hctx = blk_mq_map_queue(q, data->cmd_flags, data->ctx);
+-	if (!(data->rq_flags & RQF_SCHED_TAGS))
++	} else {
+ 		blk_mq_tag_busy(data->hctx);
++	}
+
+ 	if (data->flags & BLK_MQ_REQ_RESERVED)
+ 		data->rq_flags |= RQF_RESV;