On Thursday, 7 October 2004 at 0:31:33 +0400, Roman Kurakin wrote: > Hi, > > I have some problems with printing from kernel. > At first I think that my problems was cause I use printf, > but changed all of them to log cause it safe to use from > interrupt handlers. The situation become better but I still > observe system lockup in case I output some debug information > from my driver.
About the only thing I can think is that you're doing this in some area where it's unsafe to print, probably holding a lock that's needed in the print routines. > Also I have some problems with system console via com > port. Instead of messages from kernel I see the first letter > of the month name. > > Could anybody comment my observation? Without more detail, it's impossible to help. > Does anybody saw anything like this? No. printf() is widely used in the kernel. > Oh, I forget to say I observe that with both Current > and Releng5, SMP. Also I can't trigger NMI so I can't see the > point of lockup. Take a look at your code and check what locks you're holding. Also, if this is only for debugging, you should be using the kernel debugger. Greg -- See complete headers for address and phone numbers.
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