The patch titled
lib: percpu_counter_mod64
has been added to the -mm tree. Its filename is
lib-percpu_counter_mod64.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: lib: percpu_counter_mod64
From: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Add percpu_counter_mod64() to allow large modifications.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/percpu_counter.h | 9 +++++++++
lib/percpu_counter.c | 28 ++++++++++++++++++++++++++++
2 files changed, 37 insertions(+)
diff -puN include/linux/percpu_counter.h~lib-percpu_counter_mod64 include/linux/percpu_counter.h
--- a/include/linux/percpu_counter.h~lib-percpu_counter_mod64
+++ a/include/linux/percpu_counter.h
@@ -36,6 +36,7 @@ static inline void percpu_counter_destro
}
void percpu_counter_mod(struct percpu_counter *fbc, s32 amount);
+void percpu_counter_mod64(struct percpu_counter *fbc, s64 amount);
s64 percpu_counter_sum(struct percpu_counter *fbc);
static inline s64 percpu_counter_read(struct percpu_counter *fbc)
@@ -81,6 +82,14 @@ percpu_counter_mod(struct percpu_counter
preempt_enable();
}
+static inline void
+percpu_counter_mod64(struct percpu_counter *fbc, s64 amount)
+{
+ preempt_disable();
+ fbc->count += amount;
+ preempt_enable();
+}
+
static inline s64 percpu_counter_read(struct percpu_counter *fbc)
{
return fbc->count;
diff -puN lib/percpu_counter.c~lib-percpu_counter_mod64 lib/percpu_counter.c
--- a/lib/percpu_counter.c~lib-percpu_counter_mod64
+++ a/lib/percpu_counter.c
@@ -25,6 +25,34 @@ void percpu_counter_mod(struct percpu_co
}
EXPORT_SYMBOL(percpu_counter_mod);
+void percpu_counter_mod64(struct percpu_counter *fbc, s64 amount)
+{
+ long count;
+ s32 *pcount;
+ int cpu;
+
+ if (amount >= FBC_BATCH || amount <= -FBC_BATCH) {
+ spin_lock(&fbc->lock);
+ fbc->count += amount;
+ spin_unlock(&fbc->lock);
+ return;
+ }
+
+ cpu = get_cpu();
+ pcount = per_cpu_ptr(fbc->counters, cpu);
+ count = *pcount + amount;
+ if (count >= FBC_BATCH || count <= -FBC_BATCH) {
+ spin_lock(&fbc->lock);
+ fbc->count += count;
+ *pcount = 0;
+ spin_unlock(&fbc->lock);
+ } else {
+ *pcount = count;
+ }
+ put_cpu();
+}
+EXPORT_SYMBOL(percpu_counter_mod64);
+
/*
* Add up all the per-cpu counts, return the result. This is a more accurate
* but much slower version of percpu_counter_read_positive()
_
Patches currently in -mm which might be from a.p.zijlstra@xxxxxxxxx are
lumpy-reclaim-v4.patch
split-mmap.patch
only-allow-nonlinear-vmas-for-ram-backed-filesystems.patch
mm-remove-destroy_dirty_buffers-from-invalidate_bdev.patch
mm-optimize-kill_bdev.patch
mm-optimize-kill_bdev-fix.patch
mm-optimize-acorn-partition-truncate.patch
lazy-freeing-of-memory-through-madv_free.patch
lazy-freeing-of-memory-through-madv_free-fix.patch
lazy-freeing-of-memory-through-madv_free-vs-mm-madvise-avoid-exclusive-mmap_sem.patch
restore-madv_dontneed-to-its-original-linux-behaviour.patch
exec-fix-remove_arg_zero-add-comment.patch
lockdep-treats-down_write_trylock-like-regular-down_write.patch
nfs-fix-congestion-control-use-atomic_longs.patch
nfs-remove-congestion_end.patch
lib-dampen-the-percpu_counter-fbc_batch.patch
lib-percpu_counter_mod64.patch
mm-bdi-init-hooks.patch
mm-scalable-bdi-statistics-counters.patch
mm-count-reclaimable-pages-per-bdi.patch
mm-count-writeback-pages-per-bdi.patch
mm-expose-bdi-statistics-in-sysfs.patch
mm-per-device-dirty-threshold.patch
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