[v3,0/2] btrfs: fix size class loading logic

Message

Boris Burkov Feb. 15, 2023, 8:59 p.m. UTC

Unfortunately, this code needs another fixup, as Filipe discovered that
the fixup's use of search_forward caused a deadlock with a thread
holding the tree root lock and blocked on caching.

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Changelog:
V3: move to btrfs_for_each_slot, drop contention checking logic. Sysfs
patch holds groups sem, but releases it between raid loops if it is
contended, matching the behavior of the raid_bytes file.
V2: just organizational changes to how the original fixup was sent

Boris Burkov (2):
  btrfs: add size class stats to sysfs
  btrfs: fix size class loading logic

 fs/btrfs/block-group.c | 42 +++++++++++++++-------------------------
 fs/btrfs/sysfs.c       | 44 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 60 insertions(+), 26 deletions(-)