user/sven/linux.git/include/linux/kthread.h, branch v3.9.8

kthread: Implement park/unpark facility

2012-08-13T15:01:06Z

To avoid the full teardown/setup of per cpu kthreads in the case of cpu hot(un)plug, provide a facility which allows to put the kthread into a park position and unpark it when the cpu comes online again. Signed-off-by: Thomas Gleixner Reviewed-by: Namhyung Kim Cc: Peter Zijlstra Reviewed-by: Srivatsa S. Bhat Cc: Rusty Russell Reviewed-by: Paul E. McKenney Link: http://lkml.kernel.org/r/20120716103948.236618824@linutronix.de Signed-off-by: Thomas Gleixner

kthread_worker: reimplement flush_kthread_work() to allow freeing the work item being executed

2012-07-22T17:15:28Z

kthread_worker provides minimalistic workqueue-like interface for users which need a dedicated worker thread (e.g. for realtime priority). It has basic queue, flush_work, flush_worker operations which mostly match the workqueue counterparts; however, due to the way flush_work() is implemented, it has a noticeable difference of not allowing work items to be freed while being executed. While the current users of kthread_worker are okay with the current behavior, the restriction does impede some valid use cases. Also, removing this difference isn't difficult and actually makes the code easier to understand. This patch reimplements flush_kthread_work() such that it uses a flush_work item instead of queue/done sequence numbers. Signed-off-by: Tejun Heo

freezer: implement and use kthread_freezable_should_stop()

2011-11-21T20:32:23Z

Writeback and thinkpad_acpi have been using thaw_process() to prevent deadlock between the freezer and kthread_stop(); unfortunately, this is inherently racy - nothing prevents freezing from happening between thaw_process() and kthread_stop(). This patch implements kthread_freezable_should_stop() which enters refrigerator if necessary but is guaranteed to return if kthread_stop() is invoked. Both thaw_process() users are converted to use the new function. Note that this deadlock condition exists for many of freezable kthreads. They need to be converted to use the new should_stop or freezable workqueue. Tested with synthetic test case. Signed-off-by: Tejun Heo Acked-by: Henrique de Moraes Holschuh Cc: Jens Axboe Cc: Oleg Nesterov

treewide: use printf not attribute__((format(printf,...)))

2011-11-01T00:30:54Z

Standardize the style for compiler based printf format verification. Standardized the location of __printf too. Done via script and a little typing. $ grep -rPl --include=*.[ch] -w "__attribute__" * | \ grep -vP "^(tools|scripts|include/linux/compiler-gcc.h)" | \ xargs perl -n -i -e 'local $/; while (<>) { s/\b__attribute__\s*$\s*\(\s*format\s*\(\s*printf\s*,\s*(.+)\s*,\s*(.+)\s*$\s*\)\s*\)/__printf($1, $2)/g ; print; }' [akpm@linux-foundation.org: revert arch bits] Signed-off-by: Joe Perches Cc: "Kirill A. Shutemov" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

kthread: NUMA aware kthread_create_on_node()

2011-03-23T00:44:01Z

All kthreads being created from a single helper task, they all use memory from a single node for their kernel stack and task struct. This patch suite creates kthread_create_on_node(), adding a 'cpu' parameter to parameters already used by kthread_create(). This parameter serves in allocating memory for the new kthread on its memory node if possible. Signed-off-by: Eric Dumazet Acked-by: David S. Miller Reviewed-by: Andi Kleen Acked-by: Rusty Russell Cc: Tejun Heo Cc: Tony Luck Cc: Fenghua Yu Cc: David Howells Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

kthread: Replace deprecated spinlock initialization

2011-01-27T11:30:37Z

SPIN_LOCK_UNLOCK is deprecated. Use the lockdep capable variant instead. Signed-off-by: Thomas Gleixner

kthread_work: make lockdep happy

2010-12-22T09:27:53Z

spinlock in kthread_worker and wait_queue_head in kthread_work both should be lockdep sensible, so change the interface to make it suiltable for CONFIG_LOCKDEP. tj: comment update Reported-by: Nicolas Signed-off-by: Yong Zhang Signed-off-by: Andy Walls Tested-by: Andy Walls Cc: Tejun Heo Cc: Andrew Morton Signed-off-by: Tejun Heo

kthread: implement kthread_data()

2010-06-29T08:07:09Z

Implement kthread_data() which takes @task pointing to a kthread and returns @data specified when creating the kthread. The caller is responsible for ensuring the validity of @task when calling this function. Signed-off-by: Tejun Heo

kthread: implement kthread_worker

2010-06-29T08:07:09Z

Implement simple work processor for kthread. This is to ease using kthread. Single thread workqueue used to be used for things like this but workqueue won't guarantee fixed kthread association anymore to enable worker sharing. This can be used in cases where specific kthread association is necessary, for example, when it should have RT priority or be assigned to certain cgroup. Signed-off-by: Tejun Heo Cc: Andrew Morton

Label kthread_create() with printf attribute tag.

2008-07-25T02:11:15Z

Obvious misc patch been in my queue (& linux-next) for over a cycle. Signed-off-by: Rusty Russell Signed-off-by: Linus Torvalds

user/sven/linux.git/include/linux/kthread.h, branch v3.9.8

kthread: Implement park/unpark facility

kthread_worker: reimplement flush_kthread_work() to allow freeing the work item being executed

freezer: implement and use kthread_freezable_should_stop()

treewide: use __printf not __attribute__((format(printf,...)))

kthread: NUMA aware kthread_create_on_node()

kthread: Replace deprecated spinlock initialization

kthread_work: make lockdep happy

kthread: implement kthread_data()

kthread: implement kthread_worker

Label kthread_create() with printf attribute tag.

treewide: use printf not attribute__((format(printf,...)))