Changeset 25bbaea in mainline

Timestamp:

2011-03-25T17:10:07Z (13 years ago)

Author:

Vojtech Horky <vojtechhorky@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

889e8e3

Parents:

b5d486b

Message:

Better readability of kernel log

Serialized output from /app/klog to prevent completely distorted output
under heavy load (e.g. drivers launch).

File:

• uspace/app/klog/klog.c (modified) (3 diffs)

uspace/app/klog/klog.c

@@ -44 +44 @@
 #include <io/klog.h>
 #include <sysinfo.h>
+#include <fibril_synch.h>
 
 #define NAME       "klog"
@@ -54 +55 @@
 static FILE *log;
 
+/* Serialize the output a bit. This will not avoid messed-up log completely
+   but chances for are pretty high (experimentally confirmed). */
+static FIBRIL_MUTEX_INITIALIZE(log_mutex);
+
 static void interrupt_received(ipc_callid_t callid, ipc_call_t *call)
 {
+        fibril_mutex_lock(&log_mutex);
+        
         size_t klog_start = (size_t) IPC_GET_ARG1(*call);
         size_t klog_len = (size_t) IPC_GET_ARG2(*call);
@@ -74 +81 @@
                 fsync(fileno(log));
         }
+        
+        fibril_mutex_unlock(&log_mutex);
 }