On 10 Nov, Warner Losh wrote:
> In message <[EMAIL PROTECTED]> Zhenhai
>Duan writes:
> : Does the kernel function printf() flushes the output immediately, or it is
> : possible some data is buffered somewhere and gets lost without printing
> : to the console? like the corresponding funtion in the c library.
>
> Yes. It can be buffered, but that's a driver level thing. I've seen
> serial consoles where things crashed after a printf I put in and never
> saw.
>
> I've not seen anything similar on video consoles.
>
I want to be clear on what you're saying Warner.
Are you saying that you put a printf() after your crash point,
but never saw your printf(). So in your code it might have
looked like:
printf("foo do foo\n");
crash_here();
printf("after the crash\n");
And never see the statement "foo do foo\n";
Is that correct?
Jessem.
To Unsubscribe: send mail to [EMAIL PROTECTED]
with "unsubscribe freebsd-hackers" in the body of the message
