Re: SII SATA request size limit

[Catalin BOIE]

> In recent kernels, the siimage driver limits the max kb per request size to 15
> (7.5kb). As I was having no problems with rqsize of 128 (64kb), I decided to
> comment out this part of the code and my system is rock solid.
>
> I'm not suggesting that it should be removed, as it probably is necessary on
> other systems, but as the performance impact is huge (with 15 hdparm tests
> show an average 26mb/s and with 128 it's 47mb/s), I think the user should be
> warnned of this and there could be a option to set it to 128 in 2.6.x
> kernels, so people can try to see if it's stable. I really don't beleive that
> I have such an unique hardware configuration, so this should benefit other
> people.

I'm using 256 or 128, I don't remember exactly with a sii3112. It is rock
solid.

>
> Marcelo Penna Guerra
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.2.3 (GNU/Linux)
>
> iD8DBQE/YTYjD/U0kdg4PFoRAhBnAJ0TyeJx5nrxzDS5Rib5AEWQHx4iSACeKcn8
> wg7cUhLobywfTCcPl8GqNCc=
> =VuVw
> -----END PGP SIGNATURE-----
> -
> 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/
>

---
Catalin(ux) BOIE
catab@xxxxxxxxxxxxxxx
-
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/