Messages in this thread | | | From | Marcelo Penna Guerra <> | Subject | SII SATA request size limit | Date | Thu, 11 Sep 2003 23:57:06 -0300 |
| |
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
Hi,
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.
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@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |