On Wed, Jun 29, 2022 at 11:09:00AM +1200, Michael Schmitz wrote:
And all SCSI buffers are allocated using kmalloc? No way at all for user space to pass unaligned data?
Most that you will see actually comes from the page allocator. But the block layer has a dma_alignment limit, and when userspace sends I/O that is not properly aligned it will be bounce buffered before it it sent to the driver.
