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    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.
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