[0/6] fix for a race in btree_flush_write()

Message

Coly Li June 5, 2019, 7:27 a.m. UTC

There is a race happens in btree_flush_write() which may cause
system hang or panic. This patch set is an effor to fix such race,
and it is also necessary for the jouranl-no-space deadlock fixes. 

Any review or comments is welcome.

Thanks in advance.

Coly Li
---

Coly Li (6):
  bcache: Revert "bcache: fix high CPU occupancy during journal"
  bcache: Revert "bcache: free heap cache_set->flush_btree in
    bch_journal_free"
  bcache: set largest seq to ja->seq[bucket_index] in
    journal_read_bucket()
  bcache: remove retry_flush_write from struct cache_set
  bcache: fix race in btree_flush_write()
  bcache: add reclaimed_journal_buckets to struct cache_set

 drivers/md/bcache/bcache.h  |   4 +-
 drivers/md/bcache/btree.c   |  15 +++++-
 drivers/md/bcache/btree.h   |   2 +
 drivers/md/bcache/journal.c | 111 ++++++++++++++++++++++++++++----------------
 drivers/md/bcache/journal.h |   4 ++
 drivers/md/bcache/sysfs.c   |  10 ++--
 drivers/md/bcache/util.h    |   2 -
 7 files changed, 97 insertions(+), 51 deletions(-)