Re: FOPS needs Shutdown SIG Hook!!!

Alan Cox (alan@lxorguk.ukuu.org.uk)
Mon, 5 Jun 2000 13:23:08 +0100 (BST)

> I am referring to the buffer cache on the disks. There will be a need to
> flush/force write completion of data to the disk before power down if I
> enable the intelligent write-caching in the hardware.

If you do this then you won't be able to use IDE for journalling fs's. Before
we can do cachable re-ordered writes on the device itself we have to
implement store barrier points in the disk request queues so that the kernel
can stop the drive re-ordering when it is not safe too

> Do if something exists, what do I need look for or hook to issue flush
> cache during a halt/reboot event?

Read the DAC960 driver for one

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/