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- Fix a long standing race between the unlock callback for the last lkb
struct, and removing the rsb that became unused after the final unlock.
This could lead different nodes to inconsistent info about the rsb master
node.
- Remove unnecessary refcounting on callback structs, returning to the way
things were done in the past.
- Do message processing in softirq context. This allows dlm messages to
be cleared more quickly and efficiently, reducing long lists of incomplete
requests. A future change to run callbacks directly from this context
will make this more effective.
- The softirq message processing involved a number of patches changing
mutexes to spinlocks and rwlocks, and a fair amount of code re-org in
preparation.
- Use an rhashtable for rsb structs, rather than our old internal hash
table implementation. This also required some re-org of lists and locks
preparation for the change.
- Drop the dlm_scand kthread, and use timers to clear unused rsb structs.
Scanning all rsb's periodically was a lot of wasted work.
- Fix recent regression in logic for copying LVB data in user space lock
requests.
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Merge tag 'dlm-6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm
Pull dlm updates from David Teigland:
"This set includes some small fixes, and some big internal changes:
- Fix a long standing race between the unlock callback for the last
lkb struct, and removing the rsb that became unused after the final
unlock. This could lead different nodes to inconsistent info about
the rsb master node.
- Remove unnecessary refcounting on callback structs, returning to
the way things were done in the past.
- Do message processing in softirq context. This allows dlm messages
to be cleared more quickly and efficiently, reducing long lists of
incomplete requests. A future change to run callbacks directly from
this context will make this more effective.
- The softirq message processing involved a number of patches
changing mutexes to spinlocks and rwlocks, and a fair amount of
code re-org in preparation.
- Use an rhashtable for rsb structs, rather than our old internal
hash table implementation. This also required some re-org of lists
and locks preparation for the change.
- Drop the dlm_scand kthread, and use timers to clear unused rsb
structs. Scanning all rsb's periodically was a lot of wasted work.
- Fix recent regression in logic for copying LVB data in user space
lock requests"
* tag 'dlm-6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm: (34 commits)
dlm: return -ENOMEM if ls_recover_buf fails
dlm: fix sleep in atomic context
dlm: use rwlock for lkbidr
dlm: use rwlock for rsb hash table
dlm: drop dlm_scand kthread and use timers
dlm: do not use ref counts for rsb in the toss state
dlm: switch to use rhashtable for rsbs
dlm: add rsb lists for iteration
dlm: merge toss and keep hash table lists into one list
dlm: change to single hashtable lock
dlm: increment ls_count for dlm_scand
dlm: do message processing in softirq context
dlm: use spin_lock_bh for message processing
dlm: remove schedule in receive path
dlm: convert ls_recv_active from rw_semaphore to rwlock
dlm: avoid blocking receive at the end of recovery
dlm: convert res_lock to spinlock
dlm: convert ls_waiters_mutex to spinlock
dlm: drop mutex use in waiters recovery
dlm: add new struct to save position in dlm_copy_master_names
...
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