On Mon, 11 Mar 2024 at 18:23, Jens Axboe <axboe@xxxxxxxxx> wrote: > > > What odd hardware are people running? > > Maybe older SATA based flash? But I haven't seen any of those in years. > Or, god forbid, rotational storage? Christ. I haven't touched rotating rust in like twenty years by now. I feel dirty just thinking about it. > Out of curiosity, on your box where it broken, what does: > > grep . /sys/block/nvme0n1/queue/* > > say? Appended. FWIW, it's a 4TB Samsung 990 PRO (and not in a laptop, this is my Threadripper). Linus --- /sys/block/nvme0n1/queue/add_random:0 /sys/block/nvme0n1/queue/chunk_sectors:0 /sys/block/nvme0n1/queue/dax:0 /sys/block/nvme0n1/queue/discard_granularity:512 /sys/block/nvme0n1/queue/discard_max_bytes:2199023255040 /sys/block/nvme0n1/queue/discard_max_hw_bytes:2199023255040 /sys/block/nvme0n1/queue/discard_zeroes_data:0 /sys/block/nvme0n1/queue/dma_alignment:3 /sys/block/nvme0n1/queue/fua:1 /sys/block/nvme0n1/queue/hw_sector_size:512 /sys/block/nvme0n1/queue/io_poll:0 /sys/block/nvme0n1/queue/io_poll_delay:-1 /sys/block/nvme0n1/queue/iostats:1 /sys/block/nvme0n1/queue/io_timeout:30000 /sys/block/nvme0n1/queue/logical_block_size:512 /sys/block/nvme0n1/queue/max_discard_segments:256 /sys/block/nvme0n1/queue/max_hw_sectors_kb:128 /sys/block/nvme0n1/queue/max_integrity_segments:1 /sys/block/nvme0n1/queue/max_sectors_kb:128 /sys/block/nvme0n1/queue/max_segments:33 /sys/block/nvme0n1/queue/max_segment_size:4294967295 /sys/block/nvme0n1/queue/minimum_io_size:512 /sys/block/nvme0n1/queue/nomerges:0 /sys/block/nvme0n1/queue/nr_requests:1023 /sys/block/nvme0n1/queue/nr_zones:0 /sys/block/nvme0n1/queue/optimal_io_size:0 /sys/block/nvme0n1/queue/physical_block_size:512 /sys/block/nvme0n1/queue/read_ahead_kb:128 /sys/block/nvme0n1/queue/rotational:0 /sys/block/nvme0n1/queue/rq_affinity:1 /sys/block/nvme0n1/queue/scheduler:[none] mq-deadline kyber bfq /sys/block/nvme0n1/queue/stable_writes:0 /sys/block/nvme0n1/queue/virt_boundary_mask:4095 /sys/block/nvme0n1/queue/wbt_lat_usec:2000 /sys/block/nvme0n1/queue/write_cache:write back /sys/block/nvme0n1/queue/write_same_max_bytes:0 /sys/block/nvme0n1/queue/write_zeroes_max_bytes:0 /sys/block/nvme0n1/queue/zone_append_max_bytes:0 /sys/block/nvme0n1/queue/zoned:none /sys/block/nvme0n1/queue/zone_write_granularity:0