Juan was kind enough to linger on site, and work on a production machine, to try the parameter to make the system stable. He discovered that reducing the maximum transfer size issued to the adapter to 128KB stabilized his system. This is related to an earlier change for the 2.6.13 tree resulting from Martin Drab's testing where the transfer size was reduced from 4G to 256KB; we needed to go still further in scaling back the request size. Here is the patch that tames this regression. Applies to the 2.6.13.2 tree. Signed-off-by: Mark Salyzyn <aacraid@xxxxxxxxxxx> Index: linux-2.6.13.2/drivers/scsi/aacraid/aacraid.h =================================================================== --- linux-2.6.13.2/drivers/scsi/aacraid/aacraid.h 2005-10-05 12:45:16 -0400 +++ linux-2.6.13.2-aacraid-fix/drivers/scsi/aacraid/aacraid.h 2005-09-16 21:02:12 -0400 @@ -15,7 +15,7 @@ #define AAC_MAX_LUN (8) #define AAC_MAX_HOSTPHYSMEMPAGES (0xfffff) -#define AAC_MAX_32BIT_SGBCOUNT ((unsigned short)512) +#define AAC_MAX_32BIT_SGBCOUNT ((unsigned short)256) /* * These macros convert from physical channels to virtual channels Sincerely -- Mark Salyzyn - : send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
