[PATCH 0/4] fs: mark selected blocking waits as freezable

[Dai Junbing]

Hi,
 
During suspend and resume, tasks blocked in some interruptible wait
paths may be unnecessarily woken due to freezer state transitions. This
can introduce avoidable activity in the suspend/resume path.
 
This series marks a small set of blocking waits as freezable in places
where the task sleeps without holding locks that would make freezing
unsafe. The goal is to avoid unnecessary wakeups during suspend/resume
while preserving the normal wakeup conditions of these paths.
 
The effect is more noticeable on systems with frequent suspend/resume
cycles, such as mobile devices.

This series currently covers:
  - epoll_wait()-related waits
  - select()/poll() waits
  - blocking pipe read and FIFO open waits
  - kjournald2 commit wait
 
Comments are welcome.

Dai Junbing (4):
  eventpoll: mark ep_poll() sleep as freezable
  jbd2: make kjournald2 commit wait freezable
  pipe: mark blocking pipe read and FIFO open sleeps as freezable
  select: make select() and poll() waits freezable

 fs/eventpoll.c    | 2 +-
 fs/jbd2/journal.c | 2 +-
 fs/pipe.c         | 4 ++--
 fs/select.c       | 4 ++--
 4 files changed, 6 insertions(+), 6 deletions(-)

-- 
2.25.1