[LU-15233] Remove extraneous call to cl_page_delete

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0
• Assignee: Patrick Farrell (Inactive)
• Reporter: Patrick Farrell (Inactive)

Description

LU-5108 / https://review.whamcloud.com/#/c/10458/ / b117bc837c02e2d156bb114142a28a184aa9d633 added a call to cl_page_delete to the page discard code used by the OSC lru shrinker.

This seems to have been a mistake.  cl_page_discard causes page invalidation, which calls ll_invalidatepage, which calls cl_page_delete if the page can be found.

Since the page is locked here and ll_invalidatepage checks for the page (checking that the result of cl_vmpage_page != NULL), this has probably never caused an issue.  But it's extraneous and kind of weird, and misled me a bit when working on another bug.