From: Jason Baron <jbaron@redhat.com>
To: gregkh@suse.de
Cc: joe@perches.com, jim.cromie@gmail.com, bvanassche@acm.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 03/10] dynamic_debug: Remove uses of KERN_CONT in dynamic_emit_prefix
Date: Wed, 6 Jul 2011 13:24:44 -0400 [thread overview]
Message-ID: <fe35f0bd31c166adea772ed6c93bf84e19266b04.1309967232.git.root@dhcp-100-18-164.bos.redhat.com> (raw)
In-Reply-To: <cover.1309967232.git.root@dhcp-100-18-164.bos.redhat.com>
From: Joe Perches <joe@perches.com>
Multiple printks with KERN_CONT can be interleaved by
other printks. Reduce the likelihood of that interleaving
by consolidating multiple calls to printk.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Jason Baron <jbaron@redhat.com>
---
lib/dynamic_debug.c | 34 +++++++++++++++++++++++-----------
1 files changed, 23 insertions(+), 11 deletions(-)
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index 758e922..6669078 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -430,23 +430,35 @@ static int ddebug_exec_query(char *query_string)
static int dynamic_emit_prefix(const struct _ddebug *descriptor)
{
- int res;
+ char tid[sizeof(int) + sizeof(int)/2 + 4];
+ char lineno[sizeof(int) + sizeof(int)/2];
- res = printk(KERN_DEBUG);
if (descriptor->flags & _DPRINTK_FLAGS_INCL_TID) {
if (in_interrupt())
- res += printk(KERN_CONT "<intr> ");
+ snprintf(tid, sizeof(tid), "%s", "<intr> ");
else
- res += printk(KERN_CONT "[%d] ", task_pid_vnr(current));
+ snprintf(tid, sizeof(tid), "[%d] ",
+ task_pid_vnr(current));
+ } else {
+ tid[0] = 0;
}
- if (descriptor->flags & _DPRINTK_FLAGS_INCL_MODNAME)
- res += printk(KERN_CONT "%s:", descriptor->modname);
- if (descriptor->flags & _DPRINTK_FLAGS_INCL_FUNCNAME)
- res += printk(KERN_CONT "%s:", descriptor->function);
- if (descriptor->flags & _DPRINTK_FLAGS_INCL_LINENO)
- res += printk(KERN_CONT "%d ", descriptor->lineno);
- return res;
+ if (descriptor->flags & _DPRINTK_FLAGS_INCL_LINENO)
+ snprintf(lineno, sizeof(lineno), "%d", descriptor->lineno);
+ else
+ lineno[0] = 0;
+
+ return printk(KERN_DEBUG "%s%s%s%s%s%s",
+ tid,
+ (descriptor->flags & _DPRINTK_FLAGS_INCL_MODNAME) ?
+ descriptor->modname : "",
+ (descriptor->flags & _DPRINTK_FLAGS_INCL_MODNAME) ?
+ ":" : "",
+ (descriptor->flags & _DPRINTK_FLAGS_INCL_FUNCNAME) ?
+ descriptor->function : "",
+ (descriptor->flags & _DPRINTK_FLAGS_INCL_FUNCNAME) ?
+ ":" : "",
+ lineno);
}
int __dynamic_pr_debug(struct _ddebug *descriptor, const char *fmt, ...)
--
1.7.5.4
next prev parent reply other threads:[~2011-07-06 17:24 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-06 17:24 [PATCH 00/10] dynamic_debug: various fixes Jason Baron
2011-07-06 17:24 ` [PATCH 01/10] dynamic_debug: Add __dynamic_dev_dbg Jason Baron
2011-07-06 21:46 ` Joe Perches
2011-07-06 17:24 ` [PATCH 02/10] dynamic_debug: Consolidate prefix output to single routine Jason Baron
2011-07-07 18:14 ` Bart Van Assche
2011-07-07 19:44 ` Jim Cromie
2011-07-06 17:24 ` Jason Baron [this message]
2011-07-06 17:24 ` [PATCH 04/10] dynamic_debug: Convert printks to pr_<level> Jason Baron
2011-07-06 17:24 ` [PATCH 05/10] dynamic_debug: remove unused control variables Jason Baron
2011-07-06 17:24 ` [PATCH 06/10] dynamic_debug: add myslef as maintainer Jason Baron
2011-07-06 17:29 ` Bart Van Assche
2011-07-06 17:37 ` Jason Baron
2011-07-06 17:25 ` [PATCH 07/10] dynamic_debug: make netdev_dbg() call __netdev_printk() Jason Baron
2011-07-06 21:50 ` Joe Perches
2011-07-06 17:25 ` [PATCH 08/10] dynamic_debug: make netif_dbg() " Jason Baron
2011-07-06 21:59 ` Joe Perches
2011-07-07 14:13 ` Jason Baron
2011-07-07 16:29 ` Joe Perches
2011-07-07 18:09 ` Jason Baron
2011-07-07 21:55 ` Joe Perches
2011-07-06 17:25 ` [PATCH 09/10] dynamic_debug: consolidate repetitive struct _ddebug descriptor definitions Jason Baron
2011-07-06 17:25 ` [PATCH 10/10] dynamic_debug: remove num_enabled accounting Jason Baron
2011-07-06 17:57 ` [PATCH 00/10] dynamic_debug: various fixes Jim Cromie
2011-07-06 18:18 ` Jason Baron
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