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More fixes to ensure we get good debug logs even if we're in the

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process of destroying the stacks.  Threshhold set fairly aggressively
top 80% of stack usage.



git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@82 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c
This commit is contained in:
behlendo
2008-04-21 22:44:11 +00:00
parent e5bbd245e3
commit 7fea96c04f
3 changed files with 63 additions and 53 deletions
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include/sys/debug.h
+28 -24
View File
@@ -64,6 +64,16 @@ extern unsigned int spl_debug_stack;
#define SPL_DEFAULT_MIN_DELAY ((HZ + 1) / 2)
#define SPL_DEFAULT_BACKOFF 2
#define DL_NOTHREAD 0x0001 /* Do not create a new thread */
#define DL_SINGLE_CPU 0x0002 /* Collect pages from this CPU */
typedef struct dumplog_priv {
wait_queue_head_t dp_waitq;
pid_t dp_pid;
int dp_flags;
atomic_t dp_done;
} dumplog_priv_t;
typedef struct {
unsigned long cdls_next;
int cdls_count;
@@ -147,7 +157,7 @@ struct page_collection {
int pc_want_daemon_pages;
};
#define SBUG() spl_debug_bug(__FILE__, __FUNCTION__, __LINE__);
#define SBUG() spl_debug_bug(__FILE__, __FUNCTION__, __LINE__, 0);
#ifdef __ia64__
#define CDEBUG_STACK() (THREAD_SIZE - \
@@ -159,29 +169,24 @@ struct page_collection {
(THREAD_SIZE - 1)))
# endif /* __ia64__ */
/* DL_NOTHREAD and DL_SINGLE_CPU flags are passed to spl_debug_bug()
* because we have over run our stack and likely damaged at least one
* other unknown threads stack. We must finish generating the needed
* debug info within this thread context because once we yeild the CPU
* its very likely the system will crash.
*/
#define __CHECK_STACK(file, func, line) \
do { \
unsigned long _stack = CDEBUG_STACK(); \
unsigned long _soft_limit = (9 * THREAD_SIZE) / 10; \
unsigned long _soft_limit = (8 * THREAD_SIZE) / 10; \
\
if (unlikely(_stack > _soft_limit && _stack > spl_debug_stack)){\
spl_debug_stack = _stack; \
if (_stack <= THREAD_SIZE) { \
spl_debug_msg(NULL, D_TRACE, D_WARNING, \
file, func, line, "Warning " \
"exceeded 90%% of maximum safe " \
"stack size (%lu/%lu)\n", \
_stack, THREAD_SIZE); \
spl_debug_dumpstack(NULL); \
spl_debug_dumplog(); \
} else { \
spl_debug_msg(NULL, D_TRACE, D_WARNING, \
file, func, line, "Error " \
"exceeded maximum safe stack " \
"size (%lu/%lu)\n", \
_stack, THREAD_SIZE); \
SBUG(); \
} \
spl_debug_msg(NULL, D_TRACE, D_WARNING, \
file, func, line, "Error exceeded " \
"maximum safe stack size (%lu/%lu)\n", \
_stack, THREAD_SIZE); \
spl_debug_bug(file, func, line, DL_SINGLE_CPU); \
} \
} while (0)
@@ -213,7 +218,7 @@ do { \
spl_debug_msg(NULL, DEBUG_SUBSYSTEM, D_EMERG, \
__FILE__, __FUNCTION__, __LINE__, \
"ASSERTION(" #cond ") failed\n"); \
spl_debug_bug(__FILE__, __FUNCTION__, __LINE__); \
SBUG(); \
} \
} while (0)
@@ -226,7 +231,7 @@ do { \
__FILE__, __FUNCTION__, __LINE__, \
"ASSERTION(" #cond ") failed:" fmt, \
## a); \
spl_debug_bug(__FILE__, __FUNCTION__, __LINE__) \
SBUG(); \
} \
} while (0)
@@ -242,7 +247,7 @@ do { \
__FILE__, __FUNCTION__, __LINE__, \
"VERIFY3(" FMT " " #OP " " FMT ")\n", \
CAST __left, CAST __right); \
spl_debug_bug(__FILE__, __FUNCTION__, __LINE__); \
SBUG(); \
} \
} while (0)
@@ -285,7 +290,6 @@ do { \
#define CDEBUG_LIMIT(mask, format, a...) \
__CDEBUG_LIMIT(DEBUG_SUBSYSTEM, mask, format, ## a)
#define dprintf(fmt, a...) CDEBUG_LIMIT(D_INFO, fmt, ## a)
#define CWARN(fmt, a...) CDEBUG_LIMIT(D_WARNING, fmt, ## a)
#define CERROR(fmt, a...) CDEBUG_LIMIT(D_ERROR, fmt, ## a)
#define CEMERG(fmt, a...) CDEBUG_LIMIT(D_EMERG, fmt, ## a)
@@ -329,9 +333,9 @@ extern unsigned long spl_debug_get_subsys(void);
extern int spl_debug_set_mb(int mb);
extern int spl_debug_get_mb(void);
extern int spl_debug_dumplog(void);
extern int spl_debug_dumplog(int flags);
extern void spl_debug_dumpstack(struct task_struct *tsk);
extern void spl_debug_bug(char *file, const char *func, const int line);
extern void spl_debug_bug(char *file, const char *func, const int line, int flags);
extern int spl_debug_clear_buffer(void);
extern int spl_debug_mark_buffer(char *text);