[GIT PULL] SLAB include file dependency fixes + kmemtrace updates

Ingo Molnar
2009-04-05T19:40:41Z

Linus,

Please pull the latest kmemtrace-for-linus git tree from:

git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git kmemtrace-for-linus

We kept this topic separate from the main tracing tree due to the
unexpectedly wide and messy-looking scope of the fixes Pekka needed
to do to untangle various slab*.h, rcu*.h and fs.h dependency
chains.

After the many preparatory fixes, the tree does a few
straightforward changes to update kmemtrace to new-style tracing
APIs and to sync up the user-tool-ABI.

( Please note that i rebased the tree exactly once, shortly after it
got finished, to make it all bisectable and reviewable: the
perfect insight shown in the tree now was IMHO not humanly
possible to achieve in advance.

In reality the real development flow did these changes exactly
upside down: first we did the obvious change then all the
non-obvious (and impossible to find via code reading) hidden
dependency fixes, based on extensive testing.

It ended up being and looking quite a mess so the rebase was
justified IMHO. This looked to me to be the exception that
strengthens the rule, but plese let me know if this is frowned
upon ... )

Known risks:

- Cross-arch or rare-config build breakages

No known regressions.

Thanks,

Ingo

------------------>
Eduard - Gabriel Munteanu (4):
kmemtrace, rcu: don't include unnecessary headers, allow kmemtrace w/ tracepoints
kmemtrace: use tracepoints
kmemtrace: kmemtrace_alloc() must fill type_id
kmemtrace: restore original tracing data binary format, improve ABI

Ingo Molnar (6):
kmemtrace, fs: uninline simple_transaction_set()
kmemtrace, fs: fix linux/fdtable.h header file dependencies
kmemtrace, rcu: fix linux/rcutree.h and linux/rcuclassic.h dependencies
kmemtrace, rcu: fix rcu_tree_trace.c data structure dependencies
kmemtrace, rcu: fix rcupreempt.c data structure dependencies
kmemtrace: small cleanups

Pekka Enberg (9):
kmemtrace, fs, security: move alloc_secdata() and free_secdata() to linux/security.h
kmemtrace, security: fix linux/key.h header file dependencies
kmemtrace, befs: fix slab.h dependency problem
kmemtrace, squashfs: fix slab.h dependency problem in squasfs
kmemtrace, kbuild: fix slab.h dependency problem in lib/decompress_inflate.c
kmemtrace, kbuild: fix slab.h dependency problem in lib/decompress_bunzip2.c
kmemtrace, kbuild: fix slab.h dependency problem in lib/decompress_unlzma.c
kmemtrace, mm: fix slab.h dependency problem in mm/failslab.c
kmemtrace: trace kfree() calls with NULL or zero-length objects

fs/befs/debug.c | 1 +
fs/libfs.c | 16 +++
fs/squashfs/export.c | 1 +
include/linux/fdtable.h | 4 +-
include/linux/fs.h | 35 +-----
include/linux/key.h | 1 +
include/linux/rcuclassic.h | 16 +--
include/linux/rcupdate.h | 1 -
include/linux/rcupreempt.h | 53 ++------
include/linux/rcutree.h | 27 +----
include/linux/security.h | 24 ++++
include/linux/slab_def.h | 10 +-
include/linux/slub_def.h | 12 +-
include/trace/kmemtrace.h | 92 ++++++-------
kernel/rcuclassic.c | 23 +++-
kernel/rcupreempt.c | 48 ++++++-
kernel/rcutree.c | 20 +++
kernel/rcutree.h | 10 ++
kernel/rcutree_trace.c | 2 +
kernel/trace/kmemtrace.c | 319 ++++++++++++++++++++++++++++++-------------
kernel/trace/trace.h | 6 +
lib/decompress_bunzip2.c | 1 +
lib/decompress_inflate.c | 1 +
lib/decompress_unlzma.c | 1 +
mm/failslab.c | 1 +
mm/slab.c | 26 ++--
mm/slob.c | 30 ++---
mm/slub.c | 32 ++---
mm/util.c | 16 +++
29 files changed, 493 insertions(+), 336 deletions(-)
create mode 100644 kernel/rcutree.h

diff --git a/fs/befs/debug.c b/fs/befs/debug.c
index b8e304a..622e737 100644
--- a/fs/befs/debug.c
+++ b/fs/befs/debug.c
@@ -17,6 +17,7 @@
#include <linux/spinlock.h>
#include <linux/kernel.h>
#include <linux/fs.h>
+#include <linux/slab.h>

#endif /* __KERNEL__ */

diff --git a/fs/libfs.c b/fs/libfs.c
index 4910a36..cd22319 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -575,6 +575,21 @@ ssize_t memory_read_from_buffer(void *to, size_t count, loff_t *ppos,
* possibly a read which collects the result - which is stored in a
* file-local buffer.
*/
+
+void simple_transaction_set(struct file *file, size_t n)
+{
+ struct simple_transaction_argresp *ar = file->private_data;
+
+ BUG_ON(n > SIMPLE_TRANSACTION_LIMIT);
+
+ /*
+ * The barrier ensures that ar->size will really remain zero until
+ * ar->data is ready for reading.
+ */
+ smp_mb();
+ ar->size = n;
+}
+
char *simple_transaction_get(struct file *file, const char __user *buf, size_t size)
{
struct simple_transaction_argresp *ar;
@@ -820,6 +835,7 @@ EXPORT_SYMBOL(simple_sync_file);
EXPORT_SYMBOL(simple_unlink);
EXPORT_SYMBOL(simple_read_from_buffer);
EXPORT_SYMBOL(memory_read_from_buffer);
+EXPORT_SYMBOL(simple_transaction_set);
EXPORT_SYMBOL(simple_transaction_get);
EXPORT_SYMBOL(simple_transaction_read);
EXPORT_SYMBOL(simple_transaction_release);
diff --git a/fs/squashfs/export.c b/fs/squashfs/export.c
index 69e971d..2b1b8fe 100644
--- a/fs/squashfs/export.c
+++ b/fs/squashfs/export.c
@@ -40,6 +40,7 @@
#include <linux/dcache.h>
#include <linux/exportfs.h>
#include <linux/zlib.h>
+#include <linux/slab.h>

#include "squashfs_fs.h"
#include "squashfs_fs_sb.h"
diff --git a/include/linux/fdtable.h b/include/linux/fdtable.h
index 09d6c5b..a2ec74b 100644
--- a/include/linux/fdtable.h
+++ b/include/linux/fdtable.h
@@ -5,12 +5,14 @@
#ifndef __LINUX_FDTABLE_H
#define __LINUX_FDTABLE_H

-#include <asm/atomic.h>
#include <linux/posix_types.h>
#include <linux/compiler.h>
#include <linux/spinlock.h>
#include <linux/rcupdate.h>
#include <linux/types.h>
+#include <linux/init.h>
+
+#include <asm/atomic.h>

/*
* The default fd array needs to be at least BITS_PER_LONG,
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 61211ad..e4de2b5 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2323,19 +2323,7 @@ ssize_t simple_transaction_read(struct file *file, char __user *buf,
size_t size, loff_t *pos);
int simple_transaction_release(struct inode *inode, struct file *file);

-static inline void simple_transaction_set(struct file *file, size_t n)
-{
- struct simple_transaction_argresp *ar = file->private_data;
-
- BUG_ON(n > SIMPLE_TRANSACTION_LIMIT);
-
- /*
- * The barrier ensures that ar->size will really remain zero until
- * ar->data is ready for reading.
- */
- smp_mb();
- ar->size = n;
-}
+void simple_transaction_set(struct file *file, size_t n);

/*
* simple attribute files
@@ -2382,27 +2370,6 @@ ssize_t simple_attr_read(struct file *file, char __user *buf,
ssize_t simple_attr_write(struct file *file, const char __user *buf,
size_t len, loff_t *ppos);

-
-#ifdef CONFIG_SECURITY
-static inline char *alloc_secdata(void)
-{
- return (char *)get_zeroed_page(GFP_KERNEL);
-}
-
-static inline void free_secdata(void *secdata)
-{
- free_page((unsigned long)secdata);
-}
-#else
-static inline char *alloc_secdata(void)
-{
- return (char *)1;
-}
-
-static inline void free_secdata(void *secdata)
-{ }
-#endif /* CONFIG_SECURITY */
-
struct ctl_table;
int proc_nr_files(struct ctl_table *table, int write, struct file *filp,
void __user *buffer, size_t *lenp, loff_t *ppos);
diff --git a/include/linux/key.h b/include/linux/key.h
index 21d32a1..e544f46 100644
--- a/include/linux/key.h
+++ b/include/linux/key.h
@@ -20,6 +20,7 @@
#include <linux/rbtree.h>
#include <linux/rcupdate.h>
#include <linux/sysctl.h>
+#include <linux/rwsem.h>
#include <asm/atomic.h>

#ifdef __KERNEL__
diff --git a/include/linux/rcuclassic.h b/include/linux/rcuclassic.h
index 80044a4..bfd92e1 100644
--- a/include/linux/rcuclassic.h
+++ b/include/linux/rcuclassic.h
@@ -36,7 +36,6 @@
#include <linux/cache.h>
#include <linux/spinlock.h>
#include <linux/threads.h>
-#include <linux/percpu.h>
#include <linux/cpumask.h>
#include <linux/seqlock.h>

@@ -108,25 +107,14 @@ struct rcu_data {
struct rcu_head barrier;
};

-DECLARE_PER_CPU(struct rcu_data, rcu_data);
-DECLARE_PER_CPU(struct rcu_data, rcu_bh_data);
-
/*
* Increment the quiescent state counter.
* The counter is a bit degenerated: We do not need to know
* how many quiescent states passed, just if there was at least
* one since the start of the grace period. Thus just a flag.
*/
-static inline void rcu_qsctr_inc(int cpu)
-{
- struct rcu_data *rdp = &per_cpu(rcu_data, cpu);
- rdp->passed_quiesc = 1;
-}
-static inline void rcu_bh_qsctr_inc(int cpu)
-{
- struct rcu_data *rdp = &per_cpu(rcu_bh_data, cpu);
- rdp->passed_quiesc = 1;
-}
+extern void rcu_qsctr_inc(int cpu);
+extern void rcu_bh_qsctr_inc(int cpu);

extern int rcu_pending(int cpu);
extern int rcu_needs_cpu(int cpu);
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index 528343e..15fbb3c 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -36,7 +36,6 @@
#include <linux/cache.h>
#include <linux/spinlock.h>
#include <linux/threads.h>
-#include <linux/percpu.h>
#include <linux/cpumask.h>
#include <linux/seqlock.h>
#include <linux/lockdep.h>
diff --git a/include/linux/rcupreempt.h b/include/linux/rcupreempt.h
index 74304b4..fce5227 100644
--- a/include/linux/rcupreempt.h
+++ b/include/linux/rcupreempt.h
@@ -36,34 +36,19 @@
#include <linux/cache.h>
#include <linux/spinlock.h>
#include <linux/threads.h>
-#include <linux/percpu.h>
+#include <linux/smp.h>
#include <linux/cpumask.h>
#include <linux/seqlock.h>

-struct rcu_dyntick_sched {
- int dynticks;
- int dynticks_snap;
- int sched_qs;
- int sched_qs_snap;
- int sched_dynticks_snap;
-};
-
-DECLARE_PER_CPU(struct rcu_dyntick_sched, rcu_dyntick_sched);
-
-static inline void rcu_qsctr_inc(int cpu)
-{
- struct rcu_dyntick_sched *rdssp = &per_cpu(rcu_dyntick_sched, cpu);
-
- rdssp->sched_qs++;
-}
-#define rcu_bh_qsctr_inc(cpu)
+extern void rcu_qsctr_inc(int cpu);
+static inline void rcu_bh_qsctr_inc(int cpu) { }

/*
* Someone might want to pass call_rcu_bh as a function pointer.
* So this needs to just be a rename and not a macro function.
* (no parentheses)
*/
-#define call_rcu_bh call_rcu
+#define call_rcu_bh call_rcu

/**
* call_rcu_sched - Queue RCU callback for invocation after sched grace period.
@@ -117,30 +102,12 @@ extern struct rcupreempt_trace *rcupreempt_trace_cpu(int cpu);
struct softirq_action;

#ifdef CONFIG_NO_HZ
-
-static inline void rcu_enter_nohz(void)
-{
- static DEFINE_RATELIMIT_STATE(rs, 10 * HZ, 1);
-
- smp_mb(); /* CPUs seeing ++ must see prior RCU read-side crit sects */
- __get_cpu_var(rcu_dyntick_sched).dynticks++;
- WARN_ON_RATELIMIT(__get_cpu_var(rcu_dyntick_sched).dynticks & 0x1, &rs);
-}
-
-static inline void rcu_exit_nohz(void)
-{
- static DEFINE_RATELIMIT_STATE(rs, 10 * HZ, 1);
-
- __get_cpu_var(rcu_dyntick_sched).dynticks++;
- smp_mb(); /* CPUs seeing ++ must see later RCU read-side crit sects */
- WARN_ON_RATELIMIT(!(__get_cpu_var(rcu_dyntick_sched).dynticks & 0x1),
- &rs);
-}
-
-#else /* CONFIG_NO_HZ */
-#define rcu_enter_nohz() do { } while (0)
-#define rcu_exit_nohz() do { } while (0)
-#endif /* CONFIG_NO_HZ */
+extern void rcu_enter_nohz(void);
+extern void rcu_exit_nohz(void);
+#else
+# define rcu_enter_nohz() do { } while (0)
+# define rcu_exit_nohz() do { } while (0)
+#endif

/*
* A context switch is a grace period for rcupreempt synchronize_rcu()
diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h
index a722fb6..0cdda00 100644
--- a/include/linux/rcutree.h
+++ b/include/linux/rcutree.h
@@ -33,7 +33,6 @@
#include <linux/cache.h>
#include <linux/spinlock.h>
#include <linux/threads.h>
-#include <linux/percpu.h>
#include <linux/cpumask.h>
#include <linux/seqlock.h>

@@ -236,30 +235,8 @@ struct rcu_state {
#endif /* #ifdef CONFIG_NO_HZ */
};

-extern struct rcu_state rcu_state;
-DECLARE_PER_CPU(struct rcu_data, rcu_data);
-
-extern struct rcu_state rcu_bh_state;
-DECLARE_PER_CPU(struct rcu_data, rcu_bh_data);
-
-/*
- * Increment the quiescent state counter.
- * The counter is a bit degenerated: We do not need to know
- * how many quiescent states passed, just if there was at least
- * one since the start of the grace period. Thus just a flag.
- */
-static inline void rcu_qsctr_inc(int cpu)
-{
- struct rcu_data *rdp = &per_cpu(rcu_data, cpu);
- rdp->passed_quiesc = 1;
- rdp->passed_quiesc_completed = rdp->completed;
-}
-static inline void rcu_bh_qsctr_inc(int cpu)
-{
- struct rcu_data *rdp = &per_cpu(rcu_bh_data, cpu);
- rdp->passed_quiesc = 1;
- rdp->passed_quiesc_completed = rdp->completed;
-}
+extern void rcu_qsctr_inc(int cpu);
+extern void rcu_bh_qsctr_inc(int cpu);

extern int rcu_pending(int cpu);
extern int rcu_needs_cpu(int cpu);
diff --git a/include/linux/security.h b/include/linux/security.h
index 54ed157..d5fd616 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -32,6 +32,7 @@
#include <linux/sched.h>
#include <linux/key.h>
#include <linux/xfrm.h>
+#include <linux/gfp.h>
#include <net/flow.h>

/* Maximum number of letters for an LSM name string */
@@ -2953,5 +2954,28 @@ static inline void securityfs_remove(struct dentry *dentry)

#endif

+#ifdef CONFIG_SECURITY
+
+static inline char *alloc_secdata(void)
+{
+ return (char *)get_zeroed_page(GFP_KERNEL);
+}
+
+static inline void free_secdata(void *secdata)
+{
+ free_page((unsigned long)secdata);
+}
+
+#else
+
+static inline char *alloc_secdata(void)
+{
+ return (char *)1;
+}
+
+static inline void free_secdata(void *secdata)
+{ }
+#endif /* CONFIG_SECURITY */
+
#endif /* ! __LINUX_SECURITY_H */

diff --git a/include/linux/slab_def.h b/include/linux/slab_def.h
index f452365..5ac9b0b 100644
--- a/include/linux/slab_def.h
+++ b/include/linux/slab_def.h
@@ -73,8 +73,8 @@ found:

ret = kmem_cache_alloc_notrace(cachep, flags);

- kmemtrace_mark_alloc(KMEMTRACE_TYPE_KMALLOC, _THIS_IP_, ret,
- size, slab_buffer_size(cachep), flags);
+ trace_kmalloc(_THIS_IP_, ret,
+ size, slab_buffer_size(cachep), flags);

return ret;
}
@@ -128,9 +128,9 @@ found:

ret = kmem_cache_alloc_node_notrace(cachep, flags, node);

- kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_KMALLOC, _THIS_IP_,
- ret, size, slab_buffer_size(cachep),
- flags, node);
+ trace_kmalloc_node(_THIS_IP_, ret,
+ size, slab_buffer_size(cachep),
+ flags, node);

return ret;
}
diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index a1f9052..5046f90 100644
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -233,8 +233,7 @@ static __always_inline void *kmalloc_large(size_t size, gfp_t flags)
unsigned int order = get_order(size);
void *ret = (void *) __get_free_pages(flags | __GFP_COMP, order);

- kmemtrace_mark_alloc(KMEMTRACE_TYPE_KMALLOC, _THIS_IP_, ret,
- size, PAGE_SIZE << order, flags);
+ trace_kmalloc(_THIS_IP_, ret, size, PAGE_SIZE << order, flags);

return ret;
}
@@ -255,9 +254,7 @@ static __always_inline void *kmalloc(size_t size, gfp_t flags)

ret = kmem_cache_alloc_notrace(s, flags);

- kmemtrace_mark_alloc(KMEMTRACE_TYPE_KMALLOC,
- _THIS_IP_, ret,
- size, s->size, flags);
+ trace_kmalloc(_THIS_IP_, ret, size, s->size, flags);

return ret;
}
@@ -296,9 +293,8 @@ static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node)

ret = kmem_cache_alloc_node_notrace(s, flags, node);

- kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_KMALLOC,
- _THIS_IP_, ret,
- size, s->size, flags, node);
+ trace_kmalloc_node(_THIS_IP_, ret,
+ size, s->size, flags, node);

return ret;
}
diff --git a/include/trace/kmemtrace.h b/include/trace/kmemtrace.h
index ad8b785..28ee69f 100644
--- a/include/trace/kmemtrace.h
+++ b/include/trace/kmemtrace.h
@@ -9,65 +9,53 @@

#ifdef __KERNEL__

+#include <linux/tracepoint.h>
#include <linux/types.h>
-#include <linux/marker.h>
-
-enum kmemtrace_type_id {
- KMEMTRACE_TYPE_KMALLOC = 0, /* kmalloc() or kfree(). */
- KMEMTRACE_TYPE_CACHE, /* kmem_cache_*(). */
- KMEMTRACE_TYPE_PAGES, /* __get_free_pages() and friends. */
-};

#ifdef CONFIG_KMEMTRACE
-
extern void kmemtrace_init(void);
-
-extern void kmemtrace_mark_alloc_node(enum kmemtrace_type_id type_id,
- unsigned long call_site,
- const void *ptr,
- size_t bytes_req,
- size_t bytes_alloc,
- gfp_t gfp_flags,
- int node);
-
-extern void kmemtrace_mark_free(enum kmemtrace_type_id type_id,
- unsigned long call_site,
- const void *ptr);
-
-#else /* CONFIG_KMEMTRACE */
-
+#else
static inline void kmemtrace_init(void)
{
}
-
-static inline void kmemtrace_mark_alloc_node(enum kmemtrace_type_id type_id,
- unsigned long call_site,
- const void *ptr,
- size_t bytes_req,
- size_t bytes_alloc,
- gfp_t gfp_flags,
- int node)
-{
-}
-
-static inline void kmemtrace_mark_free(enum kmemtrace_type_id type_id,
- unsigned long call_site,
- const void *ptr)
-{
-}
-
-#endif /* CONFIG_KMEMTRACE */
-
-static inline void kmemtrace_mark_alloc(enum kmemtrace_type_id type_id,
- unsigned long call_site,
- const void *ptr,
- size_t bytes_req,
- size_t bytes_alloc,
- gfp_t gfp_flags)
-{
- kmemtrace_mark_alloc_node(type_id, call_site, ptr,
- bytes_req, bytes_alloc, gfp_flags, -1);
-}
+#endif
+
+DECLARE_TRACE(kmalloc,
+ TP_PROTO(unsigned long call_site,
+ const void *ptr,
+ size_t bytes_req,
+ size_t bytes_alloc,
+ gfp_t gfp_flags),
+ TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags));
+DECLARE_TRACE(kmem_cache_alloc,
+ TP_PROTO(unsigned long call_site,
+ const void *ptr,
+ size_t bytes_req,
+ size_t bytes_alloc,
+ gfp_t gfp_flags),
+ TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags));
+DECLARE_TRACE(kmalloc_node,
+ TP_PROTO(unsigned long call_site,
+ const void *ptr,
+ size_t bytes_req,
+ size_t bytes_alloc,
+ gfp_t gfp_flags,
+ int node),
+ TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags, node));
+DECLARE_TRACE(kmem_cache_alloc_node,
+ TP_PROTO(unsigned long call_site,
+ const void *ptr,
+ size_t bytes_req,
+ size_t bytes_alloc,
+ gfp_t gfp_flags,
+ int node),
+ TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags, node));
+DECLARE_TRACE(kfree,
+ TP_PROTO(unsigned long call_site, const void *ptr),
+ TP_ARGS(call_site, ptr));
+DECLARE_TRACE(kmem_cache_free,
+ TP_PROTO(unsigned long call_site, const void *ptr),
+ TP_ARGS(call_site, ptr));

#endif /* __KERNEL__ */

diff --git a/kernel/rcuclassic.c b/kernel/rcuclassic.c
index 654c640..0f2b0b3 100644
--- a/kernel/rcuclassic.c
+++ b/kernel/rcuclassic.c
@@ -65,6 +65,7 @@ static struct rcu_ctrlblk rcu_ctrlblk = {
.lock = __SPIN_LOCK_UNLOCKED(&rcu_ctrlblk.lock),
.cpumask = CPU_BITS_NONE,
};
+
static struct rcu_ctrlblk rcu_bh_ctrlblk = {
.cur = -300,
.completed = -300,
@@ -73,8 +74,26 @@ static struct rcu_ctrlblk rcu_bh_ctrlblk = {
.cpumask = CPU_BITS_NONE,
};

-DEFINE_PER_CPU(struct rcu_data, rcu_data) = { 0L };
-DEFINE_PER_CPU(struct rcu_data, rcu_bh_data) = { 0L };
+static DEFINE_PER_CPU(struct rcu_data, rcu_data);
+static DEFINE_PER_CPU(struct rcu_data, rcu_bh_data);
+
+/*
+ * Increment the quiescent state counter.
+ * The counter is a bit degenerated: We do not need to know
+ * how many quiescent states passed, just if there was at least
+ * one since the start of the grace period. Thus just a flag.
+ */
+void rcu_qsctr_inc(int cpu)
+{
+ struct rcu_data *rdp = &per_cpu(rcu_data, cpu);
+ rdp->passed_quiesc = 1;
+}
+
+void rcu_bh_qsctr_inc(int cpu)
+{
+ struct rcu_data *rdp = &per_cpu(rcu_bh_data, cpu);
+ rdp->passed_quiesc = 1;
+}

static int blimit = 10;
static int qhimark = 10000;
diff --git a/kernel/rcupreempt.c b/kernel/rcupreempt.c
index 5d59e85..ce97a4d 100644
--- a/kernel/rcupreempt.c
+++ b/kernel/rcupreempt.c
@@ -147,7 +147,51 @@ struct rcu_ctrlblk {
wait_queue_head_t sched_wq; /* Place for rcu_sched to sleep. */
};

+struct rcu_dyntick_sched {
+ int dynticks;
+ int dynticks_snap;
+ int sched_qs;
+ int sched_qs_snap;
+ int sched_dynticks_snap;
+};
+
+static DEFINE_PER_CPU_SHARED_ALIGNED(struct rcu_dyntick_sched, rcu_dyntick_sched) = {
+ .dynticks = 1,
+};
+
+void rcu_qsctr_inc(int cpu)
+{
+ struct rcu_dyntick_sched *rdssp = &per_cpu(rcu_dyntick_sched, cpu);
+
+ rdssp->sched_qs++;
+}
+
+#ifdef CONFIG_NO_HZ
+
+void rcu_enter_nohz(void)
+{
+ static DEFINE_RATELIMIT_STATE(rs, 10 * HZ, 1);
+
+ smp_mb(); /* CPUs seeing ++ must see prior RCU read-side crit sects */
+ __get_cpu_var(rcu_dyntick_sched).dynticks++;
+ WARN_ON_RATELIMIT(__get_cpu_var(rcu_dyntick_sched).dynticks & 0x1, &rs);
+}
+
+void rcu_exit_nohz(void)
+{
+ static DEFINE_RATELIMIT_STATE(rs, 10 * HZ, 1);
+
+ __get_cpu_var(rcu_dyntick_sched).dynticks++;
+ smp_mb(); /* CPUs seeing ++ must see later RCU read-side crit sects */
+ WARN_ON_RATELIMIT(!(__get_cpu_var(rcu_dyntick_sched).dynticks & 0x1),
+ &rs);
+}
+
+#endif /* CONFIG_NO_HZ */
+
+
static DEFINE_PER_CPU(struct rcu_data, rcu_data);
+
static struct rcu_ctrlblk rcu_ctrlblk = {
.fliplock = __SPIN_LOCK_UNLOCKED(rcu_ctrlblk.fliplock),
.completed = 0,
@@ -427,10 +471,6 @@ static void __rcu_advance_callbacks(struct rcu_data *rdp)
}
}

-DEFINE_PER_CPU_SHARED_ALIGNED(struct rcu_dyntick_sched, rcu_dyntick_sched) = {
- .dynticks = 1,
-};
-
#ifdef CONFIG_NO_HZ
static DEFINE_PER_CPU(int, rcu_update_flag);

diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index 97ce315..7f32669 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -78,6 +78,26 @@ DEFINE_PER_CPU(struct rcu_data, rcu_data);
struct rcu_state rcu_bh_state = RCU_STATE_INITIALIZER(rcu_bh_state);
DEFINE_PER_CPU(struct rcu_data, rcu_bh_data);

+/*
+ * Increment the quiescent state counter.
+ * The counter is a bit degenerated: We do not need to know
+ * how many quiescent states passed, just if there was at least
+ * one since the start of the grace period. Thus just a flag.
+ */
+void rcu_qsctr_inc(int cpu)
+{
+ struct rcu_data *rdp = &per_cpu(rcu_data, cpu);
+ rdp->passed_quiesc = 1;
+ rdp->passed_quiesc_completed = rdp->completed;
+}
+
+void rcu_bh_qsctr_inc(int cpu)
+{
+ struct rcu_data *rdp = &per_cpu(rcu_bh_data, cpu);
+ rdp->passed_quiesc = 1;
+ rdp->passed_quiesc_completed = rdp->completed;
+}
+
#ifdef CONFIG_NO_HZ
DEFINE_PER_CPU(struct rcu_dynticks, rcu_dynticks) = {
.dynticks_nesting = 1,
diff --git a/kernel/rcutree.h b/kernel/rcutree.h
new file mode 100644
index 0000000..5e872bb
--- /dev/null
+++ b/kernel/rcutree.h
@@ -0,0 +1,10 @@
+
+/*
+ * RCU implementation internal declarations:
+ */
+extern struct rcu_state rcu_state;
+DECLARE_PER_CPU(struct rcu_data, rcu_data);
+
+extern struct rcu_state rcu_bh_state;
+DECLARE_PER_CPU(struct rcu_data, rcu_bh_data);
+
diff --git a/kernel/rcutree_trace.c b/kernel/rcutree_trace.c
index d6db3e8..4ee954f 100644
--- a/kernel/rcutree_trace.c
+++ b/kernel/rcutree_trace.c
@@ -43,6 +43,8 @@
#include <linux/debugfs.h>
#include <linux/seq_file.h>

+#include "rcutree.h"
+
static void print_one_rcu_data(struct seq_file *m, struct rcu_data *rdp)
{
if (!rdp->beenonline)
diff --git a/kernel/trace/kmemtrace.c b/kernel/trace/kmemtrace.c
index ae201b3..5011f4d 100644
--- a/kernel/trace/kmemtrace.c
+++ b/kernel/trace/kmemtrace.c
@@ -6,14 +6,16 @@
* Copyright (C) 2008 Frederic Weisbecker <fweisbec@gmail.com>
*/

-#include <linux/dcache.h>
+#include <linux/tracepoint.h>
+#include <linux/seq_file.h>
#include <linux/debugfs.h>
+#include <linux/dcache.h>
#include <linux/fs.h>
-#include <linux/seq_file.h>
+
#include <trace/kmemtrace.h>

-#include "trace.h"
#include "trace_output.h"
+#include "trace.h"

/* Select an alternative, minimalistic output than the original one */
#define TRACE_KMEM_OPT_MINIMAL 0x1
@@ -25,14 +27,156 @@ static struct tracer_opt kmem_opts[] = {
};

static struct tracer_flags kmem_tracer_flags = {
- .val = 0,
- .opts = kmem_opts
+ .val = 0,
+ .opts = kmem_opts
};

-
-static bool kmem_tracing_enabled __read_mostly;
static struct trace_array *kmemtrace_array;

+/* Trace allocations */
+static inline void kmemtrace_alloc(enum kmemtrace_type_id type_id,
+ unsigned long call_site,
+ const void *ptr,
+ size_t bytes_req,
+ size_t bytes_alloc,
+ gfp_t gfp_flags,
+ int node)
+{
+ struct trace_array *tr = kmemtrace_array;
+ struct kmemtrace_alloc_entry *entry;
+ struct ring_buffer_event *event;
+
+ event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry));
+ if (!event)
+ return;
+
+ entry = ring_buffer_event_data(event);
+ tracing_generic_entry_update(&entry->ent, 0, 0);
+
+ entry->ent.type = TRACE_KMEM_ALLOC;
+ entry->type_id = type_id;
+ entry->call_site = call_site;
+ entry->ptr = ptr;
+ entry->bytes_req = bytes_req;
+ entry->bytes_alloc = bytes_alloc;
+ entry->gfp_flags = gfp_flags;
+ entry->node = node;
+
+ ring_buffer_unlock_commit(tr->buffer, event);
+
+ trace_wake_up();
+}
+
+static inline void kmemtrace_free(enum kmemtrace_type_id type_id,
+ unsigned long call_site,
+ const void *ptr)
+{
+ struct trace_array *tr = kmemtrace_array;
+ struct kmemtrace_free_entry *entry;
+ struct ring_buffer_event *event;
+
+ event = ring_buffer_lock_reserve(tr->buffer, sizeof(*entry));
+ if (!event)
+ return;
+ entry = ring_buffer_event_data(event);
+ tracing_generic_entry_update(&entry->ent, 0, 0);
+
+ entry->ent.type = TRACE_KMEM_FREE;
+ entry->type_id = type_id;
+ entry->call_site = call_site;
+ entry->ptr = ptr;
+
+ ring_buffer_unlock_commit(tr->buffer, event);
+
+ trace_wake_up();
+}
+
+static void kmemtrace_kmalloc(unsigned long call_site,
+ const void *ptr,
+ size_t bytes_req,
+ size_t bytes_alloc,
+ gfp_t gfp_flags)
+{
+ kmemtrace_alloc(KMEMTRACE_TYPE_KMALLOC, call_site, ptr,
+ bytes_req, bytes_alloc, gfp_flags, -1);
+}
+
+static void kmemtrace_kmem_cache_alloc(unsigned long call_site,
+ const void *ptr,
+ size_t bytes_req,
+ size_t bytes_alloc,
+ gfp_t gfp_flags)
+{
+ kmemtrace_alloc(KMEMTRACE_TYPE_CACHE, call_site, ptr,
+ bytes_req, bytes_alloc, gfp_flags, -1);
+}
+
+static void kmemtrace_kmalloc_node(unsigned long call_site,
+ const void *ptr,
+ size_t bytes_req,
+ size_t bytes_alloc,
+ gfp_t gfp_flags,
+ int node)
+{
+ kmemtrace_alloc(KMEMTRACE_TYPE_KMALLOC, call_site, ptr,
+ bytes_req, bytes_alloc, gfp_flags, node);
+}
+
+static void kmemtrace_kmem_cache_alloc_node(unsigned long call_site,
+ const void *ptr,
+ size_t bytes_req,
+ size_t bytes_alloc,
+ gfp_t gfp_flags,
+ int node)
+{
+ kmemtrace_alloc(KMEMTRACE_TYPE_CACHE, call_site, ptr,
+ bytes_req, bytes_alloc, gfp_flags, node);
+}
+
+static void kmemtrace_kfree(unsigned long call_site, const void *ptr)
+{
+ kmemtrace_free(KMEMTRACE_TYPE_KMALLOC, call_site, ptr);
+}
+
+static void kmemtrace_kmem_cache_free(unsigned long call_site, const void *ptr)
+{
+ kmemtrace_free(KMEMTRACE_TYPE_CACHE, call_site, ptr);
+}
+
+static int kmemtrace_start_probes(void)
+{
+ int err;
+
+ err = register_trace_kmalloc(kmemtrace_kmalloc);
+ if (err)
+ return err;
+ err = register_trace_kmem_cache_alloc(kmemtrace_kmem_cache_alloc);
+ if (err)
+ return err;
+ err = register_trace_kmalloc_node(kmemtrace_kmalloc_node);
+ if (err)
+ return err;
+ err = register_trace_kmem_cache_alloc_node(kmemtrace_kmem_cache_alloc_node);
+ if (err)
+ return err;
+ err = register_trace_kfree(kmemtrace_kfree);
+ if (err)
+ return err;
+ err = register_trace_kmem_cache_free(kmemtrace_kmem_cache_free);
+
+ return err;
+}
+
+static void kmemtrace_stop_probes(void)
+{
+ unregister_trace_kmalloc(kmemtrace_kmalloc);
+ unregister_trace_kmem_cache_alloc(kmemtrace_kmem_cache_alloc);
+ unregister_trace_kmalloc_node(kmemtrace_kmalloc_node);
+ unregister_trace_kmem_cache_alloc_node(kmemtrace_kmem_cache_alloc_node);
+ unregister_trace_kfree(kmemtrace_kfree);
+ unregister_trace_kmem_cache_free(kmemtrace_kmem_cache_free);
+}
+
static int kmem_trace_init(struct trace_array *tr)
{
int cpu;
@@ -41,14 +185,14 @@ static int kmem_trace_init(struct trace_array *tr)
for_each_cpu_mask(cpu, cpu_possible_map)
tracing_reset(tr, cpu);

- kmem_tracing_enabled = true;
+ kmemtrace_start_probes();

return 0;
}

static void kmem_trace_reset(struct trace_array *tr)
{
- kmem_tracing_enabled = false;
+ kmemtrace_stop_probes();
}

static void kmemtrace_headers(struct seq_file *s)
@@ -66,47 +210,84 @@ static void kmemtrace_headers(struct seq_file *s)
}

/*
- * The two following functions give the original output from kmemtrace,
- * or something close to....perhaps they need some missing things
+ * The following functions give the original output from kmemtrace,
+ * plus the origin CPU, since reordering occurs in-kernel now.
*/
+
+#define KMEMTRACE_USER_ALLOC 0
+#define KMEMTRACE_USER_FREE 1
+
+struct kmemtrace_user_event {
+ u8 event_id;
+ u8 type_id;
+ u16 event_size;
+ u32 cpu;
+ u64 timestamp;
+ unsigned long call_site;
+ unsigned long ptr;
+};
+
+struct kmemtrace_user_event_alloc {
+ size_t bytes_req;
+ size_t bytes_alloc;
+ unsigned gfp_flags;
+ int node;
+};
+
static enum print_line_t
-kmemtrace_print_alloc_original(struct trace_iterator *iter,
- struct kmemtrace_alloc_entry *entry)
+kmemtrace_print_alloc_user(struct trace_iterator *iter,
+ struct kmemtrace_alloc_entry *entry)
{
+ struct kmemtrace_user_event_alloc *ev_alloc;
struct trace_seq *s = &iter->seq;
- int ret;
+ struct kmemtrace_user_event *ev;
+
+ ev = trace_seq_reserve(s, sizeof(*ev));
+ if (!ev)
+ return TRACE_TYPE_PARTIAL_LINE;

- /* Taken from the old linux/kmemtrace.h */
- ret = trace_seq_printf(s, "type_id %d call_site %lu ptr %lu "
- "bytes_req %lu bytes_alloc %lu gfp_flags %lu node %d\n",
- entry->type_id, entry->call_site, (unsigned long) entry->ptr,
- (unsigned long) entry->bytes_req, (unsigned long) entry->bytes_alloc,
- (unsigned long) entry->gfp_flags, entry->node);
+ ev->event_id = KMEMTRACE_USER_ALLOC;
+ ev->type_id = entry->type_id;
+ ev->event_size = sizeof(*ev) + sizeof(*ev_alloc);
+ ev->cpu = iter->cpu;
+ ev->timestamp = iter->ts;
+ ev->call_site = entry->call_site;
+ ev->ptr = (unsigned long)entry->ptr;

- if (!ret)
+ ev_alloc = trace_seq_reserve(s, sizeof(*ev_alloc));
+ if (!ev_alloc)
return TRACE_TYPE_PARTIAL_LINE;

+ ev_alloc->bytes_req = entry->bytes_req;
+ ev_alloc->bytes_alloc = entry->bytes_alloc;
+ ev_alloc->gfp_flags = entry->gfp_flags;
+ ev_alloc->node = entry->node;
+
return TRACE_TYPE_HANDLED;
}

static enum print_line_t
-kmemtrace_print_free_original(struct trace_iterator *iter,
- struct kmemtrace_free_entry *entry)
+kmemtrace_print_free_user(struct trace_iterator *iter,
+ struct kmemtrace_free_entry *entry)
{
struct trace_seq *s = &iter->seq;
- int ret;
+ struct kmemtrace_user_event *ev;

- /* Taken from the old linux/kmemtrace.h */
- ret = trace_seq_printf(s, "type_id %d call_site %lu ptr %lu\n",
- entry->type_id, entry->call_site, (unsigned long) entry->ptr);
-
- if (!ret)
+ ev = trace_seq_reserve(s, sizeof(*ev));
+ if (!ev)
return TRACE_TYPE_PARTIAL_LINE;

+ ev->event_id = KMEMTRACE_USER_FREE;
+ ev->type_id = entry->type_id;
+ ev->event_size = sizeof(*ev);
+ ev->cpu = iter->cpu;
+ ev->timestamp = iter->ts;
+ ev->call_site = entry->call_site;
+ ev->ptr = (unsigned long)entry->ptr;
+
return TRACE_TYPE_HANDLED;
}

-
/* The two other following provide a more minimalistic output */
static enum print_line_t
kmemtrace_print_alloc_compress(struct trace_iterator *iter,
@@ -178,7 +359,7 @@ kmemtrace_print_alloc_compress(struct trace_iterator *iter,

static enum print_line_t
kmemtrace_print_free_compress(struct trace_iterator *iter,
- struct kmemtrace_free_entry *entry)
+ struct kmemtrace_free_entry *entry)
{
struct trace_seq *s = &iter->seq;
int ret;
@@ -239,20 +420,22 @@ static enum print_line_t kmemtrace_print_line(struct trace_iterator *iter)
switch (entry->type) {
case TRACE_KMEM_ALLOC: {
struct kmemtrace_alloc_entry *field;
+
trace_assign_type(field, entry);
if (kmem_tracer_flags.val & TRACE_KMEM_OPT_MINIMAL)
return kmemtrace_print_alloc_compress(iter, field);
else
- return kmemtrace_print_alloc_original(iter, field);
+ return kmemtrace_print_alloc_user(iter, field);
}

case TRACE_KMEM_FREE: {
struct kmemtrace_free_entry *field;
+
trace_assign_type(field, entry);
if (kmem_tracer_flags.val & TRACE_KMEM_OPT_MINIMAL)
return kmemtrace_print_free_compress(iter, field);
else
- return kmemtrace_print_free_original(iter, field);
+ return kmemtrace_print_free_user(iter, field);
}

default:
@@ -260,70 +443,13 @@ static enum print_line_t kmemtrace_print_line(struct trace_iterator *iter)
}
}

-/* Trace allocations */
-void kmemtrace_mark_alloc_node(enum kmemtrace_type_id type_id,
- unsigned long call_site,
- const void *ptr,
- size_t bytes_req,
- size_t bytes_alloc,
- gfp_t gfp_flags,
- int node)
-{
- struct ring_buffer_event *event;
- struct kmemtrace_alloc_entry *entry;
- struct trace_array *tr = kmemtrace_array;
-
- if (!kmem_tracing_enabled)
- return;
-
- event = trace_buffer_lock_reserve(tr, TRACE_KMEM_ALLOC,
- sizeof(*entry), 0, 0);
- if (!event)
- return;
- entry = ring_buffer_event_data(event);
-
- entry->call_site = call_site;
- entry->ptr = ptr;
- entry->bytes_req = bytes_req;
- entry->bytes_alloc = bytes_alloc;
- entry->gfp_flags = gfp_flags;
- entry->node = node;
-
- trace_buffer_unlock_commit(tr, event, 0, 0);
-}
-EXPORT_SYMBOL(kmemtrace_mark_alloc_node);
-
-void kmemtrace_mark_free(enum kmemtrace_type_id type_id,
- unsigned long call_site,
- const void *ptr)
-{
- struct ring_buffer_event *event;
- struct kmemtrace_free_entry *entry;
- struct trace_array *tr = kmemtrace_array;
-
- if (!kmem_tracing_enabled)
- return;
-
- event = trace_buffer_lock_reserve(tr, TRACE_KMEM_FREE,
- sizeof(*entry), 0, 0);
- if (!event)
- return;
- entry = ring_buffer_event_data(event);
- entry->type_id = type_id;
- entry->call_site = call_site;
- entry->ptr = ptr;
-
- trace_buffer_unlock_commit(tr, event, 0, 0);
-}
-EXPORT_SYMBOL(kmemtrace_mark_free);
-
static struct tracer kmem_tracer __read_mostly = {
- .name = "kmemtrace",
- .init = kmem_trace_init,
- .reset = kmem_trace_reset,
- .print_line = kmemtrace_print_line,
- .print_header = kmemtrace_headers,
- .flags = &kmem_tracer_flags
+ .name = "kmemtrace",
+ .init = kmem_trace_init,
+ .reset = kmem_trace_reset,
+ .print_line = kmemtrace_print_line,
+ .print_header = kmemtrace_headers,
+ .flags = &kmem_tracer_flags
};

void kmemtrace_init(void)
@@ -335,5 +461,4 @@ static int __init init_kmem_tracer(void)
{
return register_tracer(&kmem_tracer);
}
-
device_initcall(init_kmem_tracer);
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index cb0ce3f..cbc168f 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -182,6 +182,12 @@ struct trace_power {
struct power_trace state_data;
};

+enum kmemtrace_type_id {
+ KMEMTRACE_TYPE_KMALLOC = 0, /* kmalloc() or kfree(). */
+ KMEMTRACE_TYPE_CACHE, /* kmem_cache_*(). */
+ KMEMTRACE_TYPE_PAGES, /* __get_free_pages() and friends. */
+};
+
struct kmemtrace_alloc_entry {
struct trace_entry ent;
enum kmemtrace_type_id type_id;
diff --git a/lib/decompress_bunzip2.c b/lib/decompress_bunzip2.c
index 5d3ddb5..708e2a8 100644
--- a/lib/decompress_bunzip2.c
+++ b/lib/decompress_bunzip2.c
@@ -50,6 +50,7 @@
#endif /* !STATIC */

#include <linux/decompress/mm.h>
+#include <linux/slab.h>

#ifndef INT_MAX
#define INT_MAX 0x7fffffff
diff --git a/lib/decompress_inflate.c b/lib/decompress_inflate.c
index 839a329..e36b296 100644
--- a/lib/decompress_inflate.c
+++ b/lib/decompress_inflate.c
@@ -23,6 +23,7 @@
#endif /* STATIC */

#include <linux/decompress/mm.h>
+#include <linux/slab.h>

#define INBUF_LEN (16*1024)

diff --git a/lib/decompress_unlzma.c b/lib/decompress_unlzma.c
index 546f2f4..32123a1 100644
--- a/lib/decompress_unlzma.c
+++ b/lib/decompress_unlzma.c
@@ -34,6 +34,7 @@
#endif /* STATIC */

#include <linux/decompress/mm.h>
+#include <linux/slab.h>

#define MIN(a, b) (((a) < (b)) ? (a) : (b))

diff --git a/mm/failslab.c b/mm/failslab.c
index 7c6ea64..9339de5 100644
--- a/mm/failslab.c
+++ b/mm/failslab.c
@@ -1,4 +1,5 @@
#include <linux/fault-inject.h>
+#include <linux/gfp.h>

static struct {
struct fault_attr attr;
diff --git a/mm/slab.c b/mm/slab.c
index 9ec66c3..b584002 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -3565,8 +3565,8 @@ void *kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags)
{
void *ret = __cache_alloc(cachep, flags, __builtin_return_address(0));

- kmemtrace_mark_alloc(KMEMTRACE_TYPE_CACHE, _RET_IP_, ret,
- obj_size(cachep), cachep->buffer_size, flags);
+ trace_kmem_cache_alloc(_RET_IP_, ret,
+ obj_size(cachep), cachep->buffer_size, flags);

return ret;
}
@@ -3627,9 +3627,9 @@ void *kmem_cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid)
void *ret = __cache_alloc_node(cachep, flags, nodeid,
__builtin_return_address(0));

- kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_CACHE, _RET_IP_, ret,
- obj_size(cachep), cachep->buffer_size,
- flags, nodeid);
+ trace_kmem_cache_alloc_node(_RET_IP_, ret,
+ obj_size(cachep), cachep->buffer_size,
+ flags, nodeid);

return ret;
}
@@ -3657,9 +3657,8 @@ __do_kmalloc_node(size_t size, gfp_t flags, int node, void *caller)
return cachep;
ret = kmem_cache_alloc_node_notrace(cachep, flags, node);

- kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_KMALLOC,
- (unsigned long) caller, ret,
- size, cachep->buffer_size, flags, node);
+ trace_kmalloc_node((unsigned long) caller, ret,
+ size, cachep->buffer_size, flags, node);

return ret;
}
@@ -3709,9 +3708,8 @@ static __always_inline void *__do_kmalloc(size_t size, gfp_t flags,
return cachep;
ret = __cache_alloc(cachep, flags, caller);

- kmemtrace_mark_alloc(KMEMTRACE_TYPE_KMALLOC,
- (unsigned long) caller, ret,
- size, cachep->buffer_size, flags);
+ trace_kmalloc((unsigned long) caller, ret,
+ size, cachep->buffer_size, flags);

return ret;
}
@@ -3757,7 +3755,7 @@ void kmem_cache_free(struct kmem_cache *cachep, void *objp)
__cache_free(cachep, objp);
local_irq_restore(flags);

- kmemtrace_mark_free(KMEMTRACE_TYPE_CACHE, _RET_IP_, objp);
+ trace_kmem_cache_free(_RET_IP_, objp);
}
EXPORT_SYMBOL(kmem_cache_free);

@@ -3775,6 +3773,8 @@ void kfree(const void *objp)
struct kmem_cache *c;
unsigned long flags;

+ trace_kfree(_RET_IP_, objp);
+
if (unlikely(ZERO_OR_NULL_PTR(objp)))
return;
local_irq_save(flags);
@@ -3784,8 +3784,6 @@ void kfree(const void *objp)
debug_check_no_obj_freed(objp, obj_size(c));
__cache_free(c, (void *)objp);
local_irq_restore(flags);
-
- kmemtrace_mark_free(KMEMTRACE_TYPE_KMALLOC, _RET_IP_, objp);
}
EXPORT_SYMBOL(kfree);

diff --git a/mm/slob.c b/mm/slob.c
index 4dd6516..a2d4ab3 100644
--- a/mm/slob.c
+++ b/mm/slob.c
@@ -490,9 +490,8 @@ void *__kmalloc_node(size_t size, gfp_t gfp, int node)
*m = size;
ret = (void *)m + align;

- kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_KMALLOC,
- _RET_IP_, ret,
- size, size + align, gfp, node);
+ trace_kmalloc_node(_RET_IP_, ret,
+ size, size + align, gfp, node);
} else {
unsigned int order = get_order(size);

@@ -503,9 +502,8 @@ void *__kmalloc_node(size_t size, gfp_t gfp, int node)
page->private = size;
}

- kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_KMALLOC,
- _RET_IP_, ret,
- size, PAGE_SIZE << order, gfp, node);
+ trace_kmalloc_node(_RET_IP_, ret,
+ size, PAGE_SIZE << order, gfp, node);
}

return ret;
@@ -516,6 +514,8 @@ void kfree(const void *block)
{
struct slob_page *sp;

+ trace_kfree(_RET_IP_, block);
+
if (unlikely(ZERO_OR_NULL_PTR(block)))
return;

@@ -526,8 +526,6 @@ void kfree(const void *block)
slob_free(m, *m + align);
} else
put_page(&sp->page);
-
- kmemtrace_mark_free(KMEMTRACE_TYPE_KMALLOC, _RET_IP_, block);
}
EXPORT_SYMBOL(kfree);

@@ -599,16 +597,14 @@ void *kmem_cache_alloc_node(struct kmem_cache *c, gfp_t flags, int node)

if (c->size < PAGE_SIZE) {
b = slob_alloc(c->size, flags, c->align, node);
- kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_CACHE,
- _RET_IP_, b, c->size,
- SLOB_UNITS(c->size) * SLOB_UNIT,
- flags, node);
+ trace_kmem_cache_alloc_node(_RET_IP_, b, c->size,
+ SLOB_UNITS(c->size) * SLOB_UNIT,
+ flags, node);
} else {
b = slob_new_pages(flags, get_order(c->size), node);
- kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_CACHE,
- _RET_IP_, b, c->size,
- PAGE_SIZE << get_order(c->size),
- flags, node);
+ trace_kmem_cache_alloc_node(_RET_IP_, b, c->size,
+ PAGE_SIZE << get_order(c->size),
+ flags, node);
}

if (c->ctor)
@@ -646,7 +642,7 @@ void kmem_cache_free(struct kmem_cache *c, void *b)
__kmem_cache_free(b, c->size);
}

- kmemtrace_mark_free(KMEMTRACE_TYPE_CACHE, _RET_IP_, b);
+ trace_kmem_cache_free(_RET_IP_, b);
}
EXPORT_SYMBOL(kmem_cache_free);

diff --git a/mm/slub.c b/mm/slub.c
index 7aaa121..7ab54ec 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1621,8 +1621,7 @@ void *kmem_cache_alloc(struct kmem_cache *s, gfp_t gfpflags)
{
void *ret = slab_alloc(s, gfpflags, -1, _RET_IP_);

- kmemtrace_mark_alloc(KMEMTRACE_TYPE_CACHE, _RET_IP_, ret,
- s->objsize, s->size, gfpflags);
+ trace_kmem_cache_alloc(_RET_IP_, ret, s->objsize, s->size, gfpflags);

return ret;
}
@@ -1641,8 +1640,8 @@ void *kmem_cache_alloc_node(struct kmem_cache *s, gfp_t gfpflags, int node)
{
void *ret = slab_alloc(s, gfpflags, node, _RET_IP_);

- kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_CACHE, _RET_IP_, ret,
- s->objsize, s->size, gfpflags, node);
+ trace_kmem_cache_alloc_node(_RET_IP_, ret,
+ s->objsize, s->size, gfpflags, node);

return ret;
}
@@ -1767,7 +1766,7 @@ void kmem_cache_free(struct kmem_cache *s, void *x)

slab_free(s, page, x, _RET_IP_);

- kmemtrace_mark_free(KMEMTRACE_TYPE_CACHE, _RET_IP_, x);
+ trace_kmem_cache_free(_RET_IP_, x);
}
EXPORT_SYMBOL(kmem_cache_free);

@@ -2702,8 +2701,7 @@ void *__kmalloc(size_t size, gfp_t flags)

ret = slab_alloc(s, flags, -1, _RET_IP_);

- kmemtrace_mark_alloc(KMEMTRACE_TYPE_KMALLOC, _RET_IP_, ret,
- size, s->size, flags);
+ trace_kmalloc(_RET_IP_, ret, size, s->size, flags);

return ret;
}
@@ -2729,10 +2727,9 @@ void *__kmalloc_node(size_t size, gfp_t flags, int node)
if (unlikely(size > SLUB_MAX_SIZE)) {
ret = kmalloc_large_node(size, flags, node);

- kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_KMALLOC,
- _RET_IP_, ret,
- size, PAGE_SIZE << get_order(size),
- flags, node);
+ trace_kmalloc_node(_RET_IP_, ret,
+ size, PAGE_SIZE << get_order(size),
+ flags, node);

return ret;
}
@@ -2744,8 +2741,7 @@ void *__kmalloc_node(size_t size, gfp_t flags, int node)

ret = slab_alloc(s, flags, node, _RET_IP_);

- kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_KMALLOC, _RET_IP_, ret,
- size, s->size, flags, node);
+ trace_kmalloc_node(_RET_IP_, ret, size, s->size, flags, node);

return ret;
}
@@ -2796,6 +2792,8 @@ void kfree(const void *x)
struct page *page;
void *object = (void *)x;

+ trace_kfree(_RET_IP_, x);
+
if (unlikely(ZERO_OR_NULL_PTR(x)))
return;

@@ -2806,8 +2804,6 @@ void kfree(const void *x)
return;
}
slab_free(page->slab, page, object, _RET_IP_);
-
- kmemtrace_mark_free(KMEMTRACE_TYPE_KMALLOC, _RET_IP_, x);
}
EXPORT_SYMBOL(kfree);

@@ -3290,8 +3286,7 @@ void *__kmalloc_track_caller(size_t size, gfp_t gfpflags, unsigned long caller)
ret = slab_alloc(s, gfpflags, -1, caller);

/* Honor the call site pointer we recieved. */
- kmemtrace_mark_alloc(KMEMTRACE_TYPE_KMALLOC, caller, ret, size,
- s->size, gfpflags);
+ trace_kmalloc(caller, ret, size, s->size, gfpflags);

return ret;
}
@@ -3313,8 +3308,7 @@ void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags,
ret = slab_alloc(s, gfpflags, node, caller);

/* Honor the call site pointer we recieved. */
- kmemtrace_mark_alloc_node(KMEMTRACE_TYPE_KMALLOC, caller, ret,
- size, s->size, gfpflags, node);
+ trace_kmalloc_node(caller, ret, size, s->size, gfpflags, node);

return ret;
}
diff --git a/mm/util.c b/mm/util.c
index 7c122e4..2599e83 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -4,6 +4,7 @@
#include <linux/module.h>
#include <linux/err.h>
#include <linux/sched.h>
+#include <linux/tracepoint.h>
#include <asm/uaccess.h>

/**
@@ -236,3 +237,18 @@ int __attribute__((weak)) get_user_pages_fast(unsigned long start,
return ret;
}
EXPORT_SYMBOL_GPL(get_user_pages_fast);
+
+/* Tracepoints definitions. */
+DEFINE_TRACE(kmalloc);
+DEFINE_TRACE(kmem_cache_alloc);
+DEFINE_TRACE(kmalloc_node);
+DEFINE_TRACE(kmem_cache_alloc_node);
+DEFINE_TRACE(kfree);
+DEFINE_TRACE(kmem_cache_free);
+
+EXPORT_TRACEPOINT_SYMBOL(kmalloc);
+EXPORT_TRACEPOINT_SYMBOL(kmem_cache_alloc);
+EXPORT_TRACEPOINT_SYMBOL(kmalloc_node);
+EXPORT_TRACEPOINT_SYMBOL(kmem_cache_alloc_node);
+EXPORT_TRACEPOINT_SYMBOL(kfree);
+EXPORT_TRACEPOINT_SYMBOL(kmem_cache_free);