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This file seeks to explain the nuances in various delays; many driver writers are not necessarily familiar with the various kernel timers, their shortfalls, and quirks. When faced with ndelay, udelay, mdelay, usleep_range, msleep, and msleep_interrubtible the question "How do I just wait 1 ms for my hardware to latch?" has the non-intuitive "best" answer: usleep_range(1000,1500) This patch is followed by a series of checkpatch additions that seek to help kernel hackers pick the best delay. Signed-off-by: Patrick Pannuto <ppannuto@codeaurora.org> Cc: apw@canonical.com Cc: corbet@lwn.net Cc: arjan@linux.intel.com Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <1280786467-26999-3-git-send-email-ppannuto@codeaurora.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> |
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| .. | ||
| 00-INDEX | ||
| highres.txt | ||
| hpet_example.c | ||
| hpet.txt | ||
| hrtimers.txt | ||
| Makefile | ||
| timer_stats.txt | ||
| timers-howto.txt | ||