Florian Schmidt <mista.tapas(a)gmx.net> writes:
The io priorities look promising, but they kinda
compare to nice values.
Something like SCHED_FIFO for disk io would really be needed to, to
provide really high reliable recording..
IIUC, most file system I/O is actually initiated by a buffer cache
manager in the VM subsystem. At that level, I think it would be quite
difficult to relate a dirty page to properties of the process that had
done the original write().
So, "SCHED_FIFO to disk" might be limited to raw (unbuffered) I/O.
Perhaps that is fine for the scenario you envision.
--
joq