[LU-9778] ll_read_ahead_pages no longer returns count of pages

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.10.1, Lustre 2.11.0
• Severity: 3
• Assignee: Patrick Farrell (Inactive)
• Reporter: Patrick Farrell (Inactive)

Description

Patch:
LU-7990 clio: revise readahead to support 16MB IO

The major work is to adjust read ahead policy to issue
read ahead RPC by underlying RPC size

Test case is backport from Andrew Perepechko's
"LU-7140 llite: too few 4 MiB RPCs from readahead"
http://review.whamcloud.com/16374

Signed-off-by: Jinshan Xiong <[e-mail]>
Signed-off-by: Gu Zheng <[e-mail]>
Change-Id: Ib25ff37712389cca7fcee86996124e7c9dd4ec9a
Reviewed-on: http://review.whamcloud.com/19368

Removed 'count' from ll_read_ahead_pages, meaning it no longer returns the # of pages read. Several debug statements still try to print out # of pages read ahead, but can't.