[PATCH 5.4 0/1] mm: allow a controlled amount of unfairness in the page lock

[Saeed Mirzamohammadi <saeed.mirzamohammadi@xxxxxxxxxx>]

We observed a 35% of regression running phoronix pts/ramspeed and also 16%
with unixbench. Regression is caused by the following commit:
dd0f194cfeb5 | mm: rewrite wait_on_page_bit_common() logic

Backporting this fixes the regression (this is already in 5.9+):
- 5ef64cc8987a mm: allow a controlled amount of unfairness in the page lock

Linus Torvalds (1):
  mm: allow a controlled amount of unfairness in the page lock

 include/linux/mm.h   |   2 +
 include/linux/wait.h |   2 +
 kernel/sysctl.c      |   8 +++
 mm/filemap.c         | 160 ++++++++++++++++++++++++++++++++++---------
 4 files changed, 141 insertions(+), 31 deletions(-)

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2.41.0