zloop: set dma_alignment from the backing files for direct I/O

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Direct I/O request's use pages handed to the backing files unchanged, so
the backing's DMA alignment requirement applies. Track dio_mem_align and
advertise it as the device's dma_alignment so we communicate proper
limits and misaligned I/O is rejected here instead of reaching the
backend.

Reviewed-by: Hannes Reinecke <hare@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Link: https://patch.msgid.link/20260720201057.1862857-5-kbusch@meta.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Keith Busch 2026-07-20 13:10:56 -07:00 • committed by Jens Axboe

parent 6c8dec275c

commit c5059c1af2

1 changed files with 25 additions and 10 deletions

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drivers/block/zloop.c

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