5c82871335
Today I got: [39648.224782] Registered led device: iwl-phy0::TX [40676.545099] __ratelimit: 246 callbacks suppressed [40676.545103] abcdef[23675]: segfault at 0 ... as you can see the ratelimit message contains a function prefix. Since this is always __ratelimit, this wont help much. This patch changes __ratelimit and printk_ratelimit to print the function name that calls ratelimit. This will pinpoint the responsible function, as long as not several different places call ratelimit with the same ratelimit state at the same time. In that case we catch only one random function that calls ratelimit after the wait period. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Dave Young <hidave.darkstar@gmail.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> CC: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <200910231458.11832.borntraeger@de.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
32 lines
739 B
C
32 lines
739 B
C
#ifndef _LINUX_RATELIMIT_H
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#define _LINUX_RATELIMIT_H
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#include <linux/param.h>
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#include <linux/spinlock_types.h>
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#define DEFAULT_RATELIMIT_INTERVAL (5 * HZ)
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#define DEFAULT_RATELIMIT_BURST 10
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struct ratelimit_state {
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spinlock_t lock; /* protect the state */
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int interval;
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int burst;
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int printed;
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int missed;
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unsigned long begin;
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};
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#define DEFINE_RATELIMIT_STATE(name, interval_init, burst_init) \
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\
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struct ratelimit_state name = { \
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.lock = __SPIN_LOCK_UNLOCKED(name.lock), \
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.interval = interval_init, \
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.burst = burst_init, \
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}
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extern int ___ratelimit(struct ratelimit_state *rs, const char *func);
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#define __ratelimit(state) ___ratelimit(state, __func__)
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#endif /* _LINUX_RATELIMIT_H */
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