lkml.org 
[lkml]   [2006]   [Jun]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: OpenGL-based framebuffer concepts
"Antonino A. Daplas" <adaplas@gmail.com> wrote:
>
> Console writes are done with the console semaphore held. printk will also
> just write to the log buffer and defer the actual console printing
> for later, by the next or current process that will grab the semaphore.

Always by the current process which holds console_sem. Leaving the printing
for the next process would be unacceptably too late for printk.

If printk sees that someone holds console_sem, printk will leave the data
in the log buffer for the current holder of console_sem to print, prior to
that caller releasing console_sem. logbuf_log is used in tricky ways
around console_sem to prevent races in this logic.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-06-02 01:00    [W:0.353 / U:0.204 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site