- upstream fixes for kernel 4.16

[packages/lttng-modules.git] / kernel-4.16.patch

From 562860aa5d13249d2c80e51080a3437ef5d2fe0b Mon Sep 17 00:00:00 2001
From: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Date: Mon, 12 Feb 2018 18:31:40 +0100
Subject: [PATCH] Fix: update timer instrumentation on 4.16 and 4.14-rt

See upstream commit :

  commit 63e2ed3659752a4850e0ef3a07f809988fcd74a4
  Author: Anna-Maria Gleixner <anna-maria@linutronix.de>
  Date:   Thu Dec 21 11:41:38 2017 +0100

    tracing/hrtimer: Print the hrtimer mode in the 'hrtimer_start' tracepoint

    The 'hrtimer_start' tracepoint lacks the mode information. The mode is
    important because consecutive starts can switch from ABS to REL or from
    PINNED to non PINNED.

    Append the mode field.

See linux-rt commit :

  commit 6ee32a49b1ed61c08ac9f1c9fcbf83d3c749b71d
  Author: Anna-Maria Gleixner <anna-maria@linutronix.de>
  Date:   Sun Oct 22 23:39:46 2017 +0200

    tracing: hrtimer: Print hrtimer mode in hrtimer_start tracepoint

    The hrtimer_start tracepoint lacks the mode information. The mode is
    important because consecutive starts can switch from ABS to REL or from
    PINNED to non PINNED.

    Add the mode information.

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---
 instrumentation/events/lttng-module/timer.h | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/instrumentation/events/lttng-module/timer.h b/instrumentation/events/lttng-module/timer.h
index d62fd25..6f0cb7f 100644
--- a/instrumentation/events/lttng-module/timer.h
+++ b/instrumentation/events/lttng-module/timer.h
@@ -160,6 +160,27 @@ LTTNG_TRACEPOINT_EVENT_MAP(hrtimer_init,
  * hrtimer_start - called when the hrtimer is started
  * @timer: pointer to struct hrtimer
  */
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,16,0) || \
+	LTTNG_RT_KERNEL_RANGE(4,14,0,0, 4,15,0,0))
+LTTNG_TRACEPOINT_EVENT_MAP(hrtimer_start,
+
+	timer_hrtimer_start,
+
+	TP_PROTO(struct hrtimer *hrtimer, enum hrtimer_mode mode),
+
+	TP_ARGS(hrtimer, mode),
+
+	TP_FIELDS(
+		ctf_integer_hex(void *, hrtimer, hrtimer)
+		ctf_integer_hex(void *, function, hrtimer->function)
+		ctf_integer(s64, expires,
+			lttng_ktime_get_tv64(hrtimer_get_expires(hrtimer)))
+		ctf_integer(s64, softexpires,
+			lttng_ktime_get_tv64(hrtimer_get_softexpires(hrtimer)))
+		ctf_integer(enum hrtimer_mode, mode, mode)
+	)
+)
+#else
 LTTNG_TRACEPOINT_EVENT_MAP(hrtimer_start,
 
 	timer_hrtimer_start,
@@ -177,6 +198,7 @@ LTTNG_TRACEPOINT_EVENT_MAP(hrtimer_start,
 			lttng_ktime_get_tv64(hrtimer_get_softexpires(hrtimer)))
 	)
 )
+#endif
 
 /**
  * htimmer_expire_entry - called immediately before the hrtimer callback
From 9cf057fcd8189b44b11069a3f96be6e53d57c9e9 Mon Sep 17 00:00:00 2001
From: Michael Jeanson <mjeanson@efficios.com>
Date: Mon, 12 Feb 2018 18:32:12 +0100
Subject: [PATCH] Fix: update vmscan instrumentation for v4.16

See upstream commit :

  commit 9092c71bb724dba2ecba849eae69e5c9d39bd3d2
  Author: Josef Bacik <jbacik@fb.com>
  Date:   Wed Jan 31 16:16:26 2018 -0800

    mm: use sc->priority for slab shrink targets

    Previously we were using the ratio of the number of lru pages scanned to
    the number of eligible lru pages to determine the number of slab objects
    to scan.  The problem with this is that these two things have nothing to
    do with each other, so in slab heavy work loads where there is little to
    no page cache we can end up with the pages scanned being a very low
    number.  This means that we reclaim next to no slab pages and waste a
    lot of time reclaiming small amounts of space.

Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---
 instrumentation/events/lttng-module/mm_vmscan.h | 31 ++++++++++++++++++++++---
 1 file changed, 28 insertions(+), 3 deletions(-)

diff --git a/instrumentation/events/lttng-module/mm_vmscan.h b/instrumentation/events/lttng-module/mm_vmscan.h
index 9845635..a69b42f 100644
--- a/instrumentation/events/lttng-module/mm_vmscan.h
+++ b/instrumentation/events/lttng-module/mm_vmscan.h
@@ -204,7 +204,32 @@ LTTNG_TRACEPOINT_EVENT_INSTANCE(mm_vmscan_direct_reclaim_end_template, mm_vmscan
 	TP_ARGS(nr_reclaimed)
 )
 
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0))
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,16,0))
+LTTNG_TRACEPOINT_EVENT_MAP(mm_shrink_slab_start,
+
+	mm_vmscan_shrink_slab_start,
+
+	TP_PROTO(struct shrinker *shr, struct shrink_control *sc,
+		long nr_objects_to_shrink, unsigned long cache_items,
+		unsigned long long delta, unsigned long total_scan,
+		int priority),
+
+	TP_ARGS(shr, sc, nr_objects_to_shrink, cache_items, delta, total_scan,
+		priority),
+
+	TP_FIELDS(
+		ctf_integer_hex(struct shrinker *, shr, shr)
+		ctf_integer_hex(void *, shrink, shr->scan_objects)
+		ctf_integer(int, nid, sc->nid)
+		ctf_integer(long, nr_objects_to_shrink, nr_objects_to_shrink)
+		ctf_integer(gfp_t, gfp_flags, sc->gfp_mask)
+		ctf_integer(unsigned long, cache_items, cache_items)
+		ctf_integer(unsigned long long, delta, delta)
+		ctf_integer(unsigned long, total_scan, total_scan)
+		ctf_integer(int, priority, priority)
+	)
+)
+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0))
 LTTNG_TRACEPOINT_EVENT_MAP(mm_shrink_slab_start,
 
 	mm_vmscan_shrink_slab_start,
@@ -233,6 +258,7 @@ LTTNG_TRACEPOINT_EVENT_MAP(mm_shrink_slab_start,
 		ctf_integer(unsigned long, total_scan, total_scan)
 	)
 )
+#endif
 
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,16,0))
 LTTNG_TRACEPOINT_EVENT_MAP(mm_shrink_slab_end,
@@ -255,7 +281,7 @@ LTTNG_TRACEPOINT_EVENT_MAP(mm_shrink_slab_end,
 		ctf_integer(long, total_scan, total_scan)
 	)
 )
-#else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,16,0)) */
+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0))
 LTTNG_TRACEPOINT_EVENT_MAP(mm_shrink_slab_end,
 
 	mm_vmscan_shrink_slab_end,
@@ -278,7 +304,6 @@ LTTNG_TRACEPOINT_EVENT_MAP(mm_shrink_slab_end,
 		ctf_integer(long, total_scan, new_scan_cnt - unused_scan_cnt)
 	)
 )
-#endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,16,0)) */
 #endif
 
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,11,0))
From 760a1caeaf8962c438fdc7b21e1d0a4a6bb74354 Mon Sep 17 00:00:00 2001
From: Michael Jeanson <mjeanson@efficios.com>
Date: Mon, 12 Feb 2018 18:32:25 +0100
Subject: [PATCH] Fix: update rcu instrumentation for v4.16

See upstream commits :

  commit dec98900eae1e22467182e58688abe5fae98bd5f
  Author: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
  Date:   Wed Oct 4 16:24:29 2017 -0700

    rcu: Add ->dynticks field to rcu_dyntick trace event

  commit 84585aa8b6ad24e5bdfba9db4a320a6aeed192ab
  Author: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
  Date:   Wed Oct 4 15:55:16 2017 -0700

    rcu: Shrink ->dynticks_{nmi_,}nesting from long long to long

    Because the ->dynticks_nesting field now only contains the process-based
    nesting level instead of a value encoding both the process nesting level
    and the irq "nesting" level, we no longer need a long long, even on
    32-bit systems.  This commit therefore changes both the ->dynticks_nesting
    and ->dynticks_nmi_nesting fields to long.

Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---
 instrumentation/events/lttng-module/rcu.h | 41 ++++++++++++++++++++++++++-----
 1 file changed, 35 insertions(+), 6 deletions(-)

diff --git a/instrumentation/events/lttng-module/rcu.h b/instrumentation/events/lttng-module/rcu.h
index 869de08..4528a79 100644
--- a/instrumentation/events/lttng-module/rcu.h
+++ b/instrumentation/events/lttng-module/rcu.h
@@ -220,31 +220,60 @@ LTTNG_TRACEPOINT_EVENT(rcu_fqs,
  * events use the upper bits of each number, while interrupt-related
  * events use the lower bits.
  */
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,16,0))
 LTTNG_TRACEPOINT_EVENT(rcu_dyntick,
 
+	TP_PROTO(const char *polarity, long oldnesting, long newnesting, atomic_t dynticks),
+
+	TP_ARGS(polarity, oldnesting, newnesting, dynticks),
+
+	TP_FIELDS(
+		ctf_string(polarity, polarity)
+		ctf_integer(long, oldnesting, oldnesting)
+		ctf_integer(long, newnesting, newnesting)
+		ctf_integer(int, dynticks, atomic_read(&dynticks))
+	)
+)
+
+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
+LTTNG_TRACEPOINT_EVENT(rcu_dyntick,
 
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 	TP_PROTO(const char *polarity, long long oldnesting, long long newnesting),
 
 	TP_ARGS(polarity, oldnesting, newnesting),
+
+	TP_FIELDS(
+		ctf_string(polarity, polarity)
+		ctf_integer(long long, oldnesting, oldnesting)
+		ctf_integer(long long, newnesting, newnesting)
+	)
+)
 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
+LTTNG_TRACEPOINT_EVENT(rcu_dyntick,
+
 	TP_PROTO(char *polarity, long long oldnesting, long long newnesting),
 
 	TP_ARGS(polarity, oldnesting, newnesting),
+
+	TP_FIELDS(
+		ctf_string(polarity, polarity)
+		ctf_integer(long long, oldnesting, oldnesting)
+		ctf_integer(long long, newnesting, newnesting)
+	)
+)
 #else
+LTTNG_TRACEPOINT_EVENT(rcu_dyntick,
+
 	TP_PROTO(char *polarity),
 
 	TP_ARGS(polarity),
-#endif
 
 	TP_FIELDS(
 		ctf_string(polarity, polarity)
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
-		ctf_integer(long long, oldnesting, oldnesting)
-		ctf_integer(long long, newnesting, newnesting)
-#endif
 	)
 )
+#endif
+
 
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0))
 /*