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Subject[PATCH 4/5] lock stat kills lock meter for -rt (annotations)
From

Rough annotations to speed up the object attachment logic.

bill

============================================================
--- arch/xtensa/platform-iss/network.c eee47b0ca011d1c327ce7aff0c9a7547695d3a1f
+++ arch/xtensa/platform-iss/network.c 76b16d29a46677a45d56b64983e0783959aa2160
@@ -648,6 +648,8 @@ static int iss_net_configure(int index,
.have_mac = 0,
});

+ spin_lock_init(&lp->lock);
+
/*
* Try all transport protocols.
* Note: more protocols can be added by adding '&& !X_init(lp, eth)'.
============================================================
--- fs/dcache.c 20226054e6d6b080847e7a892d0b47a7ad042288
+++ fs/dcache.c 64d2b2b78b50dc2da7e409f2a9721b80c8fbbaf3
@@ -884,7 +884,7 @@ struct dentry *d_alloc(struct dentry * p

atomic_set(&dentry->d_count, 1);
dentry->d_flags = DCACHE_UNHASHED;
- spin_lock_init(&dentry->d_lock);
+ spin_lock_init_annotated(&dentry->d_lock, &_lock_stat_d_alloc_entry);
dentry->d_inode = NULL;
dentry->d_parent = NULL;
dentry->d_sb = NULL;
============================================================
--- fs/xfs/support/ktrace.c 1136cf72f9273718da47405b594caebaa59b66d3
+++ fs/xfs/support/ktrace.c 122729d6084fa84115b8f8f75cc55c585bfe3676
@@ -162,6 +162,7 @@ ktrace_enter(

ASSERT(ktp != NULL);

+ spin_lock_init(&wrap_lock); //--billh
/*
* Grab an entry by pushing the index up to the next one.
*/
============================================================
--- include/linux/eventpoll.h bd142a622609d04952fac6215586fff353dab729
+++ include/linux/eventpoll.h 43271ded1a3b9f40beb37aaff9e02fadeecb4655
@@ -15,6 +15,7 @@
#define _LINUX_EVENTPOLL_H

#include <linux/types.h>
+#include <linux/lock_stat.h>


/* Valid opcodes to issue to sys_epoll_ctl() */
@@ -55,7 +56,7 @@ static inline void eventpoll_init_file(s
static inline void eventpoll_init_file(struct file *file)
{
INIT_LIST_HEAD(&file->f_ep_links);
- spin_lock_init(&file->f_ep_lock);
+ spin_lock_init_annotated(&file->f_ep_lock, &_lock_stat_eventpoll_init_file_entry);
}


============================================================
--- include/linux/wait.h 12da8de69f1f2660443a04c3df199e5d851ea2ca
+++ include/linux/wait.h 9b7448af82583bd11d18032aedfa8f2af44345f4
@@ -81,7 +81,7 @@ extern void init_waitqueue_head(wait_que

extern void init_waitqueue_head(wait_queue_head_t *q);

-#ifdef CONFIG_LOCKDEP
+#if defined(CONFIG_LOCKDEP) || defined(CONFIG_LOCK_STAT)
# define __WAIT_QUEUE_HEAD_INIT_ONSTACK(name) \
({ init_waitqueue_head(&name); name; })
# define DECLARE_WAIT_QUEUE_HEAD_ONSTACK(name) \
============================================================
--- init/main.c 636e95fd9af6357291dace2b9995fd72d36e945f
+++ init/main.c 2e30dc30c4aca9b1ff56064887e04d8262db30e7
@@ -608,6 +608,7 @@ asmlinkage void __init start_kernel(void
#ifdef CONFIG_PROC_FS
proc_root_init();
#endif
+ lock_stat_sys_init(); //--billh
cpuset_init();
taskstats_init_early();
delayacct_init();
============================================================
--- net/tipc/node.c d6ddb08c5332517b0eff3b72ee0adc48f47801ff
+++ net/tipc/node.c 9712633ceb8f939fc14a0a4861f7121840beff1d
@@ -77,7 +77,7 @@ struct node *tipc_node_create(u32 addr)

memset(n_ptr, 0, sizeof(*n_ptr));
n_ptr->addr = addr;
- spin_lock_init(&n_ptr->lock);
+ spin_lock_init(&n_ptr->lock);
INIT_LIST_HEAD(&n_ptr->nsub);
n_ptr->owner = c_ptr;
tipc_cltr_attach_node(c_ptr, n_ptr);
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