From 78f566af913ca7f330a7790933bdba928c5c34ab Mon Sep 17 00:00:00 2001
From: Rostislav Lisovy <lisovy@gmail.com>
Date: Wed, 7 Sep 2011 13:59:25 +0200
Subject: [PATCH] Added stack traces for better understanding of invocation of
 functions related to canprio filter.

---
 doc/canprio/debugging/stacktrace_change.txt   | 26 ++++++++++++++++++
 doc/canprio/debugging/stacktrace_classify.txt | 21 +++++++++++++++
 doc/canprio/debugging/stacktrace_create.txt   | 27 +++++++++++++++++++
 3 files changed, 74 insertions(+)
 create mode 100644 doc/canprio/debugging/stacktrace_change.txt
 create mode 100644 doc/canprio/debugging/stacktrace_classify.txt
 create mode 100644 doc/canprio/debugging/stacktrace_create.txt

diff --git a/doc/canprio/debugging/stacktrace_change.txt b/doc/canprio/debugging/stacktrace_change.txt
new file mode 100644
index 0000000..a74c23b
--- /dev/null
+++ b/doc/canprio/debugging/stacktrace_change.txt
@@ -0,0 +1,26 @@
+Pid: 6113, comm: tc Not tainted 2.6.36.2-00370-g4f1bc4e #3
+Call Trace:
+ [<f80ee550>] canprio_set_parms+0x19/0x20b [cls_canprio]
+ [<c11988c1>] ? nla_parse+0xaf/0xbb
+ [<f80ee7b8>] canprio_change+0x76/0x3b0 [cls_canprio]
+ [<c126bcf5>] tc_ctl_tfilter+0x27b/0x626
+ [<c125f1fc>] rtnetlink_rcv_msg+0x12d/0x1f4
+ [<c126ba7a>] ? tc_ctl_tfilter+0x0/0x626
+ [<c125f0cf>] ? rtnetlink_rcv_msg+0x0/0x1f4
+ [<c1270aba>] netlink_rcv_skb+0x80/0x9b
+ [<c125f0c8>] rtnetlink_rcv+0x20/0x27
+ [<c12707b6>] netlink_unicast+0x245/0x284
+ [<c1270f70>] netlink_sendmsg+0x1d2/0x2ec
+ [<c1243cac>] sock_sendmsg+0xac/0xce
+ [<c10255ae>] ? kmap_atomic_prot+0x48/0xbf
+ [<c109364f>] ? zone_watermark_ok+0x1a/0xa6
+ [<c1094654>] ? get_page_from_freelist+0x20c/0x482
+ [<c124ca0d>] ? verify_iovec+0x49/0x9c
+ [<c12440fe>] sys_sendmsg+0x10b/0x20d
+ [<c108fea9>] ? unlock_page+0x4b/0x4e
+ [<c10a4bb1>] ? __do_fault+0x33b/0x441
+ [<c10a59c6>] ? handle_mm_fault+0x17e/0x755
+ [<c1243fd0>] ? sys_recvmsg+0x3b/0x5e
+ [<c12455e0>] sys_socketcall+0xd8/0x272
+ [<c1002b90>] sysenter_do_call+0x12/0x26
+
diff --git a/doc/canprio/debugging/stacktrace_classify.txt b/doc/canprio/debugging/stacktrace_classify.txt
new file mode 100644
index 0000000..776255d
--- /dev/null
+++ b/doc/canprio/debugging/stacktrace_classify.txt
@@ -0,0 +1,21 @@
+Pid: 6346, comm: cangen Not tainted 2.6.36.2-00370-g4f1bc4e #3
+Call Trace:
+ [<f81081a5>] canprio_classify+0x1b/0x124 [cls_canprio]
+ [<c1268e0c>] tc_classify_compat+0x36/0x6a
+ [<c126a004>] tc_classify+0x42/0x9e
+ [<c107b065>] ? trace_buffer_lock_reserve+0xf/0x31
+ [<f803f6f3>] prio_enqueue+0x36/0x127 [sch_prio]
+ [<c1253597>] dev_queue_xmit+0x137/0x3c0
+ [<c101cd9d>] ? prepare_ftrace_return+0x57/0x82
+ [<f8053b42>] ? can_send+0x5/0x153 [can]
+ [<f8053b42>] ? can_send+0x5/0x153 [can]
+ [<f8053ba5>] can_send+0x68/0x153 [can]
+ [<f806f459>] raw_sendmsg+0xe1/0x11d [can_raw]
+ [<c12430e4>] sock_aio_write+0xf1/0x109
+ [<c10ba08a>] do_sync_write+0xa1/0xce
+ [<c105091e>] ? hrtimer_try_to_cancel+0x70/0xc4
+ [<c1050e5c>] ? hrtimer_nanosleep+0x97/0x108
+ [<c10baa1b>] vfs_write+0x11f/0x130
+ [<c10baad6>] sys_write+0x42/0x69
+ [<c1002b90>] sysenter_do_call+0x12/0x26
+
diff --git a/doc/canprio/debugging/stacktrace_create.txt b/doc/canprio/debugging/stacktrace_create.txt
new file mode 100644
index 0000000..3a71915
--- /dev/null
+++ b/doc/canprio/debugging/stacktrace_create.txt
@@ -0,0 +1,27 @@
+Pid: 6034, comm: tc Not tainted 2.6.36.2-00370-g4f1bc4e #3
+Call Trace:
+ [<f80ee550>] canprio_set_parms+0x19/0x20b [cls_canprio]
+ [<c10b6479>] ? kmem_cache_alloc_notrace+0x74/0x76
+ [<f80ee8b9>] canprio_change+0x177/0x3b0 [cls_canprio]
+ [<c10b6479>] ? kmem_cache_alloc_notrace+0x74/0x76
+ [<c126bcf5>] tc_ctl_tfilter+0x27b/0x626
+ [<c125f1fc>] rtnetlink_rcv_msg+0x12d/0x1f4
+ [<c126ba7a>] ? tc_ctl_tfilter+0x0/0x626
+ [<c125f0cf>] ? rtnetlink_rcv_msg+0x0/0x1f4
+ [<c1270aba>] netlink_rcv_skb+0x80/0x9b
+ [<c125f0c8>] rtnetlink_rcv+0x20/0x27
+ [<c12707b6>] netlink_unicast+0x245/0x284
+ [<c1270f70>] netlink_sendmsg+0x1d2/0x2ec
+ [<c1243cac>] sock_sendmsg+0xac/0xce
+ [<c10255ae>] ? kmap_atomic_prot+0x48/0xbf
+ [<c109364f>] ? zone_watermark_ok+0x1a/0xa6
+ [<c1094654>] ? get_page_from_freelist+0x20c/0x482
+ [<c124ca0d>] ? verify_iovec+0x49/0x9c
+ [<c12440fe>] sys_sendmsg+0x10b/0x20d
+ [<c108fea9>] ? unlock_page+0x4b/0x4e
+ [<c10a4bb1>] ? __do_fault+0x33b/0x441
+ [<c10a59c6>] ? handle_mm_fault+0x17e/0x755
+ [<c1243fd0>] ? sys_recvmsg+0x3b/0x5e
+ [<c12455e0>] sys_socketcall+0xd8/0x272
+ [<c1002b90>] sysenter_do_call+0x12/0x26
+
-- 
2.39.2