Messages in this thread | | | From | Thomas Graf <> | Subject | [PATCH 0/9 net-next v2] rhashtable: Per bucket locks & deferred table resizing | Date | Fri, 2 Jan 2015 23:00:13 +0100 |
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Prepares for and introduces per bucket spinlocks and deferred table resizing. This allows for parallel table mutations in different hash buckets from atomic context. The resizing occurs in the background in a separate worker thread while lookups, inserts, and removals can continue.
Also modified the chain linked list to be terminated with a special nulls marker to allow entries to move between multiple lists.
Last but not least, reintroduces lockless netlink_lookup() with deferred Netlink socket destruction to avoid the side effect of increased netlink_release() runtime.
Thomas Graf (9): rhashtable: Do hashing inside of rhashtable_lookup_compare() rhashtable: Use rht_obj() instead of manual offset calculation rhashtable: Convert bucket iterators to take table and index rhashtable: Factor out bucket_tail() function nft_hash: Remove rhashtable_remove_pprev() spinlock: Add spin_lock_bh_nested() rhashtable: Per bucket locks & deferred expansion/shrinking rhashtable: Supports for nulls marker netlink: Lockless lookup with RCU grace period in socket release
include/linux/list_nulls.h | 3 +- include/linux/rhashtable.h | 258 ++++++++++++----- include/linux/spinlock.h | 8 + include/linux/spinlock_api_smp.h | 2 + include/linux/spinlock_api_up.h | 1 + kernel/locking/spinlock.c | 8 + lib/rhashtable.c | 607 ++++++++++++++++++++++++++------------- net/netfilter/nft_hash.c | 92 +++--- net/netlink/af_netlink.c | 64 ++--- net/netlink/af_netlink.h | 1 + net/netlink/diag.c | 4 +- 11 files changed, 693 insertions(+), 355 deletions(-)
-- 1.9.3
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