Thanks for the info I've upgraded the kernel to 2.4.21-20 and have a very slight increase in performance but unfortunately not much to write home about. I have limited experience with kernel compilation and I'm a little confused as to which aacraid.h I would have to add the #define SCSI_HAS_VARY_IO 1 to. I have the following aacraid.h files /usr/src/aacraid-1.1.4-2302/aacraid.h /usr/src/linux-2.4.21-20.EL/drivers/addon/aacraid_10102/aacraid.h /usr/src/linux-2.4.21-20.EL/drivers/scsi/aacraid/aacraid.h Ordinarily I would modify the .h file in the scsi/aacraid dir and then go through the full kernel recompile but I have updated aacraid using the Dell rpm. I assume the version in this folder is the old version that shipped with the 2.4.21-20 source. If there is a way that I can recompile just the aacraid module without doing a full kernel recompile I would prefer to do this . Zoe -----Original Message----- From: Matt Domsch [mailto:Matt_Domsch@xxxxxxxx] Sent: Monday, October 25, 2004 2:02 PM To: Salyzyn, Mark Cc: Zoe May; linux-raid@xxxxxxxxxxxxxxx Subject: Re: Aacraid - terrible performance on RHES3 pedge 2450 On Mon, Oct 25, 2004 at 08:28:47AM -0400, Salyzyn, Mark wrote: > Vary_io may be the reason for this. > > The driver needs to have .vary_io set to 1. > > There are no kernel clues to its existence (that I know of), but the > driver has an SCSI_HAS_VARY_IO to enable. Our build system will > produce correct binaries, but the DKMS tool does not differentiate. > > There is a need to ship a different driver source in the DKMS package > for RHEL3 as a result (Add a #define SCSI_HAS_VARY_IO in the aacraid.h > file). We could do this easily in DKMS with its PATCH_MATCH mechanism, making it match RHEL kernel names and apply the patch only then which sets .vary_io=1. -- Matt Domsch Sr. Software Engineer, Lead Engineer Dell Linux Solutions linux.dell.com & www.dell.com/linux Linux on Dell mailing lists @ http://lists.us.dell.com - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
