> Are you absolutely sure? What about serial drivers and the TTY layer?
> Have you audited all of that code too? What about SCSI_BH? What
> about IMMEDIATE_BH, TQUEUE_BH? Do they interact non-trivially with
> timers too?
SCSH_BH is gone in 2.5.23. Matthew Wilcox has a patch to remove
IMMEDIATE_BH.
TIMER_BH is the only BH left as far as I know.
So the needed synchronization, if any, is against the other softirqs.
Robert Love
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