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If the I/O offset and length is multiple of the media size then

Description

If the I/O offset and length is multiple of the media size then
directly pass the request otherwise use a buffer that is a
multiple of the media size. This speeds up I/O quite a bit
when using large transfer sizes on 4Kn disks etc.

MFC after: 1 week

Details

Provenance
ambriskoAuthored on
Parents
rS300865: The flag "vm_pages_needed" has long served two distinct purposes: (1) to
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