[LU-17292] cl page should be properly pined for transfer.

• Type: Bug
• Resolution: Unresolved
• Priority: Major
• Severity: 3
• Assignee: Alexey Lyashkov
• Reporter: Alexey Lyashkov

Description

cl page pinned with enter to cache now, but this reference released in the rpc completion.
it mean page stay in cache but without reference.
once rpc prepared in the ap_make_ready - lets move a ref protection in this place.
This mean we may remove an extra brw ops in future.