cregit-Linux how code gets into the kernel

Release 4.8 lib/ratelimit.c

Directory: lib
 * ratelimit.c - Do something with rate limit.
 * Isolated from kernel/printk.c by Dave Young <>
 * 2008-05-01 rewrite the function and use a ratelimit_state data struct as
 * parameter. Now every user can use their own standalone ratelimit_state.
 * This file is released under the GPLv2.

#include <linux/ratelimit.h>
#include <linux/jiffies.h>
#include <linux/export.h>

 * __ratelimit - rate limiting
 * @rs: ratelimit_state data
 * @func: name of calling function
 * This enforces a rate limit: not more than @rs->burst callbacks
 * in every @rs->interval
 * 0 means callbacks will be suppressed.
 * 1 means go ahead and do it.

int ___ratelimit(struct ratelimit_state *rs, const char *func) { unsigned long flags; int ret; if (!rs->interval) return 1; /* * If we contend on this state's lock then almost * by definition we are too busy to print a message, * in addition to the one that will be printed by * the entity that is holding the lock already: */ if (!raw_spin_trylock_irqsave(&rs->lock, flags)) return 0; if (!rs->begin) rs->begin = jiffies; if (time_is_before_jiffies(rs->begin + rs->interval)) { if (rs->missed) { if (!(rs->flags & RATELIMIT_MSG_ON_RELEASE)) { pr_warn("%s: %d callbacks suppressed\n", func, rs->missed); rs->missed = 0; } } rs->begin = jiffies; rs->printed = 0; } if (rs->burst && rs->burst > rs->printed) { rs->printed++; ret = 1; } else { rs->missed++; ret = 0; } raw_spin_unlock_irqrestore(&rs->lock, flags); return ret; }


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ingo molnaringo molnar3117.51%222.22%
borislav petkovborislav petkov2111.86%111.11%
christian borntraegerchristian borntraeger73.95%111.11%
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thomas gleixnerthomas gleixner21.13%111.11%
yong zhangyong zhang10.56%111.11%


Overall Contributors

dave youngdave young12263.21%216.67%
ingo molnaringo molnar3317.10%325.00%
borislav petkovborislav petkov2110.88%18.33%
christian borntraegerchristian borntraeger84.15%18.33%
alexey dobriyanalexey dobriyan42.07%18.33%
thomas gleixnerthomas gleixner21.04%18.33%
yong zhangyong zhang21.04%216.67%
paul gortmakerpaul gortmaker10.52%18.33%
Directory: lib
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