Re: Areca driver recap + status

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Ar Maw, 2006-06-27 am 10:27 -0500, ysgrifennodd James Bottomley:
> On a PAE platform, dma_addr_t is u64 and unsigned long is u32, so any
> address > 4GB will be truncated by these operations.
> 
> I think all this does is cause a slow leak of dma mappings, and on any
> kernel > 2.6.16 the leak should be even smaller, since we've severely
> restricted the use_sg == 0 case.  It probably is only significant on
> x86_64 with the gart iommu enabled.

On x86_64 the dma_addr_t and the ulong are both 64bit so the problem
doesn't arise. 

Alan

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux