diff options
Diffstat (limited to 'meta/recipes-kernel/lttng/lttng-modules/0003-fix-mm-tracing-record-slab-name-for-kmem_cache_free-.patch')
-rw-r--r-- | meta/recipes-kernel/lttng/lttng-modules/0003-fix-mm-tracing-record-slab-name-for-kmem_cache_free-.patch | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/meta/recipes-kernel/lttng/lttng-modules/0003-fix-mm-tracing-record-slab-name-for-kmem_cache_free-.patch b/meta/recipes-kernel/lttng/lttng-modules/0003-fix-mm-tracing-record-slab-name-for-kmem_cache_free-.patch deleted file mode 100644 index 71f99b80a3..0000000000 --- a/meta/recipes-kernel/lttng/lttng-modules/0003-fix-mm-tracing-record-slab-name-for-kmem_cache_free-.patch +++ /dev/null | |||
@@ -1,91 +0,0 @@ | |||
1 | From 49c603ef2dc6969f4454f0d849af00ee24bb7f04 Mon Sep 17 00:00:00 2001 | ||
2 | From: Michael Jeanson <mjeanson@efficios.com> | ||
3 | Date: Thu, 4 Mar 2021 16:50:12 -0500 | ||
4 | Subject: [PATCH 3/4] fix: mm, tracing: record slab name for kmem_cache_free() | ||
5 | (v5.12) | ||
6 | |||
7 | See upstream commit: | ||
8 | |||
9 | commit 3544de8ee6e4817278b15fe08658de49abf58954 | ||
10 | Author: Jacob Wen <jian.w.wen@oracle.com> | ||
11 | Date: Wed Feb 24 12:00:55 2021 -0800 | ||
12 | |||
13 | mm, tracing: record slab name for kmem_cache_free() | ||
14 | |||
15 | Currently, a trace record generated by the RCU core is as below. | ||
16 | |||
17 | ... kmem_cache_free: call_site=rcu_core+0x1fd/0x610 ptr=00000000f3b49a66 | ||
18 | |||
19 | It doesn't tell us what the RCU core has freed. | ||
20 | |||
21 | This patch adds the slab name to trace_kmem_cache_free(). | ||
22 | The new format is as follows. | ||
23 | |||
24 | ... kmem_cache_free: call_site=rcu_core+0x1fd/0x610 ptr=0000000037f79c8d name=dentry | ||
25 | ... kmem_cache_free: call_site=rcu_core+0x1fd/0x610 ptr=00000000f78cb7b5 name=sock_inode_cache | ||
26 | ... kmem_cache_free: call_site=rcu_core+0x1fd/0x610 ptr=0000000018768985 name=pool_workqueue | ||
27 | ... kmem_cache_free: call_site=rcu_core+0x1fd/0x610 ptr=000000006a6cb484 name=radix_tree_node | ||
28 | |||
29 | We can use it to understand what the RCU core is going to free. For | ||
30 | example, some users maybe interested in when the RCU core starts | ||
31 | freeing reclaimable slabs like dentry to reduce memory pressure. | ||
32 | |||
33 | Link: https://lkml.kernel.org/r/20201216072804.8838-1-jian.w.wen@oracle.com | ||
34 | |||
35 | Upstream-status: backport | ||
36 | |||
37 | Signed-off-by: Michael Jeanson <mjeanson@efficios.com> | ||
38 | Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | ||
39 | Change-Id: I1ee2fc476614cadcc8d3ac5d8feddc7910e1aa3a | ||
40 | --- | ||
41 | instrumentation/events/lttng-module/kmem.h | 27 ++++++++++++++++++++++ | ||
42 | 1 file changed, 27 insertions(+) | ||
43 | |||
44 | diff --git a/instrumentation/events/lttng-module/kmem.h b/instrumentation/events/lttng-module/kmem.h | ||
45 | index b134620a..d787ea54 100644 | ||
46 | --- a/instrumentation/events/lttng-module/kmem.h | ||
47 | +++ b/instrumentation/events/lttng-module/kmem.h | ||
48 | @@ -87,6 +87,32 @@ LTTNG_TRACEPOINT_EVENT_INSTANCE(kmem_alloc_node, kmem_cache_alloc_node, | ||
49 | TP_ARGS(call_site, ptr, bytes_req, bytes_alloc, gfp_flags, node) | ||
50 | ) | ||
51 | |||
52 | +#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,12,0)) | ||
53 | +LTTNG_TRACEPOINT_EVENT(kfree, | ||
54 | + | ||
55 | + TP_PROTO(unsigned long call_site, const void *ptr), | ||
56 | + | ||
57 | + TP_ARGS(call_site, ptr), | ||
58 | + | ||
59 | + TP_FIELDS( | ||
60 | + ctf_integer_hex(unsigned long, call_site, call_site) | ||
61 | + ctf_integer_hex(const void *, ptr, ptr) | ||
62 | + ) | ||
63 | +) | ||
64 | + | ||
65 | +LTTNG_TRACEPOINT_EVENT(kmem_cache_free, | ||
66 | + | ||
67 | + TP_PROTO(unsigned long call_site, const void *ptr, const char *name), | ||
68 | + | ||
69 | + TP_ARGS(call_site, ptr, name), | ||
70 | + | ||
71 | + TP_FIELDS( | ||
72 | + ctf_integer_hex(unsigned long, call_site, call_site) | ||
73 | + ctf_integer_hex(const void *, ptr, ptr) | ||
74 | + ctf_string(name, name) | ||
75 | + ) | ||
76 | +) | ||
77 | +#else | ||
78 | LTTNG_TRACEPOINT_EVENT_CLASS(kmem_free, | ||
79 | |||
80 | TP_PROTO(unsigned long call_site, const void *ptr), | ||
81 | @@ -114,6 +140,7 @@ LTTNG_TRACEPOINT_EVENT_INSTANCE(kmem_free, kmem_cache_free, | ||
82 | |||
83 | TP_ARGS(call_site, ptr) | ||
84 | ) | ||
85 | +#endif | ||
86 | |||
87 | #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,3,0)) | ||
88 | LTTNG_TRACEPOINT_EVENT_MAP(mm_page_free, kmem_mm_page_free, | ||
89 | -- | ||
90 | 2.19.1 | ||
91 | |||