Followup to: <b9bupr$jkm$2@tangens.hometree.net>
By author: "Henning P. Schmiedehausen" <hps@intermeta.de>
In newsgroup: linux.dev.kernel
>
> Jens Axboe <axboe@suse.de> writes:
>
> >I dunno what the purpose of that would be exactly, I guess to cater to
> >some hardware odditites?
>
> Wild guess: You can use larger transfer sizes with the 48 bit
> interface, even when adressing the lower 28 bit space?
>
> This might be a win for applications that stream large contigous
> blocks from/to a HD (Video, Audio...)
>
Right, Jens basically does something like:
use_48_bits := (address+length > 2^28) || (length >= 2^16)
-hpa
-- <hpa@transmeta.com> at work, <hpa@zytor.com> in private! "Unix gives you enough rope to shoot yourself in the foot." Architectures needed: ia64 m68k mips64 ppc ppc64 s390 s390x sh v850 x86-64 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Wed May 07 2003 - 22:00:33 EST