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Uday Shankar authored
The block layer might merge together discard requests up until the max_discard_segments limit is hit, but blk_insert_cloned_request checks the segment count against max_segments regardless of the req op. This can result in errors like the following when discards are issued through a DM device and max_discard_segments exceeds max_segments for the queue of the chosen underlying device. blk_insert_cloned_request: over max segments limit. (256 > 129) Fix this by looking at the req_op and enforcing the appropriate segment limit - max_discard_segments for REQ_OP_DISCARDs and max_segments for everything else. Signed-off-by:
Uday Shankar <ushankar@purestorage.com> Reviewed-by:
Keith Busch <kbusch@kernel.org> Reviewed-by:
Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20230301000655.48112-1-ushankar@purestorage.comSigned-off-by:
Jens Axboe <axboe@kernel.dk>
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