linux/kernel/workqueue.c, branch v2.6.28

cpumask: introduce new API, without changing anything

2008-11-06T08:05:33Z

Impact: introduce new APIs We want to deprecate cpumasks on the stack, as we are headed for gynormous numbers of CPUs. Eventually, we want to head towards an undefined 'struct cpumask' so they can never be declared on stack. 1) New cpumask functions which take pointers instead of copies. (cpus_* -> cpumask_*) 2) Several new helpers to reduce requirements for temporary cpumasks (cpumask_first_and, cpumask_next_and, cpumask_any_and) 3) Helpers for declaring cpumasks on or offstack for large NR_CPUS (cpumask_var_t, alloc_cpumask_var and free_cpumask_var) 4) 'struct cpumask' for explicitness and to mark new-style code. 5) Make iterator functions stop at nr_cpu_ids (a runtime constant), not NR_CPUS for time efficiency and for smaller dynamic allocations in future. 6) cpumask_copy() so we can allocate less than a full cpumask eventually (for alloc_cpumask_var), and so we can eliminate the 'struct cpumask' definition eventually. 7) work_on_cpu() helper for doing task on a CPU, rather than saving old cpumask for current thread and manipulating it. 8) smp_call_function_many() which is smp_call_function_mask() except taking a cpumask pointer. Note that this patch simply introduces the new functions and leaves the obsolescent ones in place. This is to simplify the transition patches. Signed-off-by: Rusty Russell Signed-off-by: Ingo Molnar

workqueue: introduce create_rt_workqueue

2008-10-21T23:00:25Z

create_rt_workqueue will create a real time prioritized workqueue. This is needed for the conversion of stop_machine to a workqueue based implementation. This patch adds yet another parameter to __create_workqueue_key to tell it that we want an rt workqueue. However it looks like we rather should have something like "int type" instead of singlethread, freezable and rt. Signed-off-by: Heiko Carstens Signed-off-by: Rusty Russell Cc: Ingo Molnar

Remove Andrew Morton's old email accounts

2008-10-16T18:21:32Z

People can use the real name an an index into MAINTAINERS to find the current email address. Signed-off-by: Francois Cami Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Merge branch 'core/locking' into core/urgent

2008-08-11T22:11:49Z

lockdep: rename map_[acquire|release]() => lock_map_[acquire|release]()

2008-08-11T08:30:30Z

the names were too generic: drivers/uio/uio.c:87: error: expected identifier or '(' before 'do' drivers/uio/uio.c:87: error: expected identifier or '(' before 'while' drivers/uio/uio.c:113: error: 'map_release' undeclared here (not in a function) Signed-off-by: Ingo Molnar

lockdep: map_acquire

2008-08-11T07:30:23Z

Most the free-standing lock_acquire() usages look remarkably similar, sweep them into a new helper. Signed-off-by: Peter Zijlstra Signed-off-by: Ingo Molnar

workqueues: add comments to __create_workqueue_key()

2008-07-30T16:41:47Z

Dmitry Adamushko pointed out that the error handling in __create_workqueue_key() is not clear, add the comment. Signed-off-by: Oleg Nesterov Cc: Dmitry Adamushko Cc: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

workqueues: do CPU_UP_CANCELED if CPU_UP_PREPARE fails

2008-07-25T17:53:41Z

The bug was pointed out by Akinobu Mita , and this patch is based on his original patch. workqueue_cpu_callback(CPU_UP_PREPARE) expects that if it returns NOTIFY_BAD, _cpu_up() will send CPU_UP_CANCELED then. However, this is not true since "cpu hotplug: cpu: deliver CPU_UP_CANCELED only to NOTIFY_OKed callbacks with CPU_UP_PREPARE" commit: a0d8cdb652d35af9319a9e0fb7134de2a276c636 The callback which has returned NOTIFY_BAD will not receive CPU_UP_CANCELED. Change the code to fulfil the CPU_UP_CANCELED logic if CPU_UP_PREPARE fails. Signed-off-by: Oleg Nesterov Reported-by: Akinobu Mita Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

workqueues: schedule_on_each_cpu() can use schedule_work_on()

2008-07-25T17:53:40Z

schedule_on_each_cpu() can use schedule_work_on() to avoid the code duplication. Signed-off-by: Oleg Nesterov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

workqueues: queue_work() can use queue_work_on()

2008-07-25T17:53:40Z

queue_work() can use queue_work_on() to avoid the code duplication. Signed-off-by: Oleg Nesterov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds