Interesting that a small tidy up from Linus directly caused such an impact on Redis/Apache. > That Apache regression was tracked down to a Linux 5.9 change by

Interesting that a small tidy up from Linus directly caused such an impact on Redis/Apache. > That Apache regression was tracked down to a Linux 5.9 change by Linus Torvalds himself. He took up rewriting the wait_on_page_bit_common() logic.