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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2007-10-16 23:25:50 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-17 08:42:45 -0700
commit3e26c149c358529b1605f8959341d34bc4b880a3 (patch)
tree9d173b1753b86bcf03a8591e2509e3162234447c /include/linux
parent04fbfdc14e5f48463820d6b9807daa5e9c92c51f (diff)
downloadblackbird-op-linux-3e26c149c358529b1605f8959341d34bc4b880a3.tar.gz
blackbird-op-linux-3e26c149c358529b1605f8959341d34bc4b880a3.zip
mm: dirty balancing for tasks
Based on ideas of Andrew: http://marc.info/?l=linux-kernel&m=102912915020543&w=2 Scale the bdi dirty limit inversly with the tasks dirty rate. This makes heavy writers have a lower dirty limit than the occasional writer. Andrea proposed something similar: http://lwn.net/Articles/152277/ The main disadvantage to his patch is that he uses an unrelated quantity to measure time, which leaves him with a workload dependant tunable. Other than that the two approaches appear quite similar. [akpm@linux-foundation.org: fix warning] Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/init_task.h1
-rw-r--r--include/linux/sched.h2
2 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/init_task.h b/include/linux/init_task.h
index 513bc3e489f0..3a619f57a2b2 100644
--- a/include/linux/init_task.h
+++ b/include/linux/init_task.h
@@ -171,6 +171,7 @@ extern struct group_info init_groups;
[PIDTYPE_PGID] = INIT_PID_LINK(PIDTYPE_PGID), \
[PIDTYPE_SID] = INIT_PID_LINK(PIDTYPE_SID), \
}, \
+ .dirties = INIT_PROP_LOCAL_SINGLE(dirties), \
INIT_TRACE_IRQFLAGS \
INIT_LOCKDEP \
}
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 592e3a55f818..59738efff8ad 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -74,6 +74,7 @@ struct sched_param {
#include <linux/pid.h>
#include <linux/percpu.h>
#include <linux/topology.h>
+#include <linux/proportions.h>
#include <linux/seccomp.h>
#include <linux/rcupdate.h>
#include <linux/futex.h>
@@ -1149,6 +1150,7 @@ struct task_struct {
#ifdef CONFIG_FAULT_INJECTION
int make_it_fail;
#endif
+ struct prop_local_single dirties;
};
/*
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