James Bottomley wrote:
On Tue, 2005-06-07 at 20:07 +0200, Jens Axboe wrote:
I've slowly been doing the same thing in other places in the kernel and
this bit has been talked about between James and I for at least a year
or two.
Yes, it's long been a dream of mine to eliminate at least struct
scsi_request and just use block struct request for everything in the
SCSI layer.
The most pleasing aspect of this will be getting rid of the dma mapping
duplications in st and sg.
James,
A "char_uld" library that st, sg, ch and the proposed OSD
ULDs could tap into, would cut the duplication. As you can
see, Kai and I have shared implementations in this area but
had no mechanism for sharing the actual code.
An idea I had was to flag what mechanism inserted a
command onto a request queue and when a blk_pc_request()
follows a blk_pc_request() then use FIFO order for
the second one.
Doug Gilbert
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