[PATCH -next v3 0/4] rhashtable: guarantee initial allocation

From: Davidlohr Bueso
Date: Thu Jun 21 2018 - 17:36:29 EST


Changes from v2:
lkml.kernel.org/r/20180601160125.30031-1-dave@xxxxxxxxxxxx

- Dropped original patch 1 (which removed the EINVAL returns
for WARN_ON) as well as patch 5.
- Added a new patch 1, which simplifies the alloc after mhocko's
changes (originally suggested by Linus).
- Use max_t instead of min_t for the resize.

Changes from v1
lkml.kernel.org/r/20180524211135.27760-1-dave@xxxxxxxxxxxx

- patch 2 is reworked a bit based on the commments from Herbert Xu.
o upon failure, retry immediately with GFP_NOFAIL (simpler)
o the caller now passes the needed semantics, not bucket_table_alloc().
o we consider min_size when resizing, not just HASH_MIN_SIZE.

- removed patch 3; not need after Michal's patch.

Hi,

This series is the result of the discussion with Linus around ipc
subsystem initialization and how it behaves with error return when
calling rhashtable_init()[1]. Instead of caring about the error
or calling the infamous BUG_ON, Linus suggested we guarantee the
rhashtable allocation.

First two patches deal with the rhashtable_init() changes, while the
patches 3+4 remove some ipc hacks we no longer need.

Please consider for v4.19.

[0] https://lkml.org/lkml/2018/5/23/758

Thanks!

Davidlohr Bueso (4):
lib/rhashtable: simplify bucket_table_alloc()
lib/rhashtable: guarantee initial hashtable allocation
ipc: get rid of ids->tables_initialized hack
ipc: simplify ipc initialization

include/linux/ipc_namespace.h | 1 -
ipc/msg.c | 9 ++++-----
ipc/namespace.c | 20 ++++----------------
ipc/sem.c | 10 ++++------
ipc/shm.c | 9 ++++-----
ipc/util.c | 41 +++++++++++++----------------------------
ipc/util.h | 18 +++++++++---------
lib/rhashtable.c | 19 ++++++++++++-------
8 files changed, 50 insertions(+), 77 deletions(-)

--
2.16.4