Latest working kernel version: not sure Earliest failing kernel version: not sure Distribution: slackware Hardware Environment: i386 Software Environment: Problem Description: boot_delay with more than 10ms is too slow, even 10ms it's very slow as well. Steps to reproduce: lpj=your_lpj_copy_from_last_dmesg boot_delay=100ms
There's some discussion about it in lkml. I feel like it's related to x86 timers, but not sure. Use mdelay the result is more acceptable, but mdelay seems work only after the delay caliberation. OTOH, I found printk_time is about 3 * boot_delay while testing. But the real time interval is far longer then 3 * boot_delay. BTW, I tested on my powerpc g4 macmini, boot_delay works ok.