On Tue, 2015-11-10 at 14:56 -0500, Sinan Kaya wrote: > > On 11/10/2015 2:43 PM, James Bottomley wrote: > > The Issue, as stated by LSI is > > > > Initially set the consistent DMA mask to 32 bit and then change > > it > > to 64 bit mask after allocating RDPQ pools by calling the > > function > > _base_change_consistent_dma_mask. This is to ensure that all the > > upper 32 bits of RDPQ entries's base address to be same. > > > > Need somebody from mpt to confirm that this behavior is still valid for > the recent cards besides altix. OK, you don't seem to be understanding the problem: the Altix isn't a LSI card, it was a SGI platform. It was the platform where we first discovered the issue that a lot of storage cards didn't work because it by default had no memory below 4GB. The reason coherent masks were introduced was initially so the Altix could manufacture and manage a region of memory in the lower 4GB region and we would guarantee to make allocations from it so the storage cards would then work on that platform. I thought the Altix was a historical relic because after they disappeared, there was no other platform with this issue ... until you came along. James -- To unsubscribe from this list: 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
