On 7/19/25 15:26, Nilay Shroff wrote:
During probe, when the block layer registers a request queue, it
defaults to the mq-deadline I/O scheduler if the device is single-queue
and the mq-deadline module is available. To determine availability, the
elevator_set_default() invokes elevator_find_get(), which increments the
module's reference count. However, this reference is never released,
resulting in a module reference leak that prevents the mq-deadline module
from being unloaded.
This patch fixes the issue by ensuring the acquired module reference is
properly released.
Fixes: 1e44bedbc921 ("block: unifying elevator change")
Signed-off-by: Nilay Shroff <nilay@xxxxxxxxxxxxx>
---
Note: This patch is based on https://lore.kernel.org/all/20250718133232.626418-1-nilay@xxxxxxxxxxxxx/
So please apply this patch after the above is merged.
---
block/elevator.c | 19 +++++++++++++------
1 file changed, 13 insertions(+), 6 deletions(-)
Reviewed-by: Hannes Reinecke <hare@xxxxxxx>
Cheers,
Hannes
--
Dr. Hannes Reinecke Kernel Storage Architect
hare@xxxxxxx +49 911 74053 688
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