05 May, 2015
1 commit
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Signed-off-by: Chris Bainbridge
Signed-off-by: Tejun Heo
21 Aug, 2013
1 commit
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No functional changes. This patch fixes the post gcwq comments in
Documentation/workqueue.txt.tj: Whitespace adjustments. Minor updates.
Signed-off-by: Libin
Signed-off-by: Tejun Heo
30 Jul, 2013
1 commit
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dbf2576e37 ("workqueue: make all workqueues non-reentrant") made
WQ_NON_REENTRANT no-op but the following patches didn't remove the
flag or update the documentation. Let's mark the flag deprecated and
update the documentation accordingly.Signed-off-by: Tejun Heo
14 Jul, 2012
1 commit
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WQ_HIGHPRI was implemented by queueing highpri work items at the head
of the global worklist. Other than queueing at the head, they weren't
handled differently; unfortunately, this could lead to execution
latency of a few seconds on heavily loaded systems.Now that workqueue code has been updated to deal with multiple
worker_pools per global_cwq, this patch reimplements WQ_HIGHPRI using
a separate worker_pool. NR_WORKER_POOLS is bumped to two and
gcwq->pools[0] is used for normal pri work items and ->pools[1] for
highpri. Highpri workers get -20 nice level and has 'H' suffix in
their names. Note that this change increases the number of kworkers
per cpu.POOL_HIGHPRI_PENDING, pool_determine_ins_pos() and highpri chain
wakeup code in process_one_work() are no longer used and removed.This allows proper prioritization of highpri work items and removes
high execution latency of highpri work items.v2: nr_running indexing bug in get_pool_nr_running() fixed.
v3: Refreshed for the get_pool_nr_running() update in the previous
patch.Signed-off-by: Tejun Heo
Reported-by: Josh Hunt
LKML-Reference:
Cc: Tony Luck
Cc: Fengguang Wu
31 Mar, 2011
1 commit
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It is not obvious how to debug run-away workers.
These are some tips given by Tejun on lkml.
Signed-off-by: Florian Mickler
Signed-off-by: Tejun Heo
17 Feb, 2011
1 commit
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There are two spellings in use for 'freeze' + 'able' - 'freezable' and
'freezeable'. The former is the more prominent one. The latter is
mostly used by workqueue and in a few other odd places. Unify the
spelling to 'freezable'.Signed-off-by: Tejun Heo
Reported-by: Alan Stern
Acked-by: "Rafael J. Wysocki"
Acked-by: Greg Kroah-Hartman
Acked-by: Dmitry Torokhov
Cc: David Woodhouse
Cc: Alex Dubov
Cc: "David S. Miller"
Cc: Steven Whitehouse
11 Oct, 2010
1 commit
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Add WQ_MEM_RECLAIM flag which currently maps to WQ_RESCUER, mark
WQ_RESCUER as internal and replace all external WQ_RESCUER usages to
WQ_MEM_RECLAIM.This makes the API users express the intent of the workqueue instead
of indicating the internal mechanism used to guarantee forward
progress. This is also to make it cleaner to add more semantics to
WQ_MEM_RECLAIM. For example, if deemed necessary, memory reclaim
workqueues can be made highpri.This patch doesn't introduce any functional change.
Signed-off-by: Tejun Heo
Cc: Jeff Garzik
Cc: Dave Chinner
Cc: Steven Whitehouse
13 Sep, 2010
1 commit
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Update copyright notice and add Documentation/workqueue.txt.
Randy Dunlap, Dave Chinner: misc fixes.
Signed-off-by: Tejun Heo
Reviewed-By: Florian Mickler
Cc: Ingo Molnar
Cc: Christoph Lameter
Cc: Randy Dunlap
Cc: Dave Chinner