[lkml]   [2002]   [Apr]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: Event logging vs enhancing printk
"Martin J. Bligh" wrote:
>> ...
> 1. There seems to me to be a race within the current SMP code (with or without
> the event logging stuff). It seems that segments of the line could get interspersed
> with segments of another line (or a whole other line) generated by another cpu ...
> is this correct?

I'm not aware of that being the case. The output string
is formed into a static buffer and then copied into the
printk ring buffer all under spinlock_irqsave(logbuf_lock).

If there is something wrong then it would be occurring
at the other end - where data is taken out of the ring
and is sent to the console device(s). The locking there
is OK, I think?

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:25    [W:0.266 / U:1.324 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site