Re: [Patch] SCSI I/O statistics

From: Matthew Wilcox
Date: Tue Sep 26 2006 - 14:24:25 EST


On Tue, Sep 26, 2006 at 10:39:30AM -0700, Andrew Morton wrote:
> - Should it have been done at the block layer rather than at the scsi layer?

This was already mentioned when he sent it to linux-scsi a few days ago.
There are scsi commands which bypass the block layer, such as SG_IO, and
block layer stats can make an extremely busy disc look not busy.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/