diff options
| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-05-05 17:50:24 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-05-05 20:18:32 +0200 |
| commit | c5078f78b455fbf67ea71442c7e7ca8acf9ff095 (patch) | |
| tree | bdd3b699919f2b23faf13177954e82b570653711 /include/linux | |
| parent | 6de6a7b95705b859b61430fa3afa1403034eb3e6 (diff) | |
perf_counter: provide an mlock threshold
Provide a threshold to relax the mlock accounting, increasing usability.
Each counter gets perf_counter_mlock_kb for free.
[ Impact: allow more mmap buffering ]
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <20090505155437.112113632@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/perf_counter.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h index 0fcbf34a4f7..00081d84169 100644 --- a/include/linux/perf_counter.h +++ b/include/linux/perf_counter.h @@ -358,6 +358,7 @@ struct file; struct perf_mmap_data { struct rcu_head rcu_head; int nr_pages; /* nr of data pages */ + int nr_locked; /* nr pages mlocked */ atomic_t poll; /* POLL_ for wakeups */ atomic_t head; /* write position */ @@ -575,6 +576,7 @@ struct perf_callchain_entry { extern struct perf_callchain_entry *perf_callchain(struct pt_regs *regs); extern int sysctl_perf_counter_priv; +extern int sysctl_perf_counter_mlock; extern void perf_counter_init(void); |