[0/1] bcache fix for Linux v5.19 (3rd wave)

Message

Coly Li May 28, 2022, 6:19 a.m. UTC

Hi Jens,

This submission only has 1 patch, which is the effort to avoid bogus
soft lockup warning from the bcache writeback rate update kworker.

Based on your suggestion, this version is more clear and simple, it
works as expected in my testing. BCH_WBRATE_UPDATE_RETRY_MAX (15)
defines the maximum retry times for lock contention, in worst case it
is 1+ minutes before update_writeback_rate() call down_read() to acquire
dc->writeback_lock.

Please consider to take it, and thank you again for the suggestion.

Coly Li
---

Coly Li (1):
  bcache: avoid unnecessary soft lockup in kworker
    update_writeback_rate()

 drivers/md/bcache/bcache.h    |  7 +++++++
 drivers/md/bcache/writeback.c | 31 +++++++++++++++++++++----------
 2 files changed, 28 insertions(+), 10 deletions(-)