On 10/16/2017 01:32 PM, Mike Kravetz wrote: > On 10/16/2017 11:07 AM, Michal Hocko wrote: >> On Mon 16-10-17 10:43:38, Mike Kravetz wrote: >>> Just to be clear, the posix standard talks about a typed memory object. >>> The suggested implementation has one create a connection to the memory >>> object to receive a fd, then use mmap as usual to get a mapping backed >>> by contiguous pages/memory. Of course, this type of implementation is >>> not a requirement. >> >> I am not sure that POSIC standard for typed memory is easily >> implementable in Linux. Does any OS actually implement this API? > > A quick search only reveals Blackberry QNX and PlayBook OS. > > Also somewhat related. In a earlier thread someone pointed out this > out of tree module used for contiguous allocations in SOC (and other?) > environments. It even has the option of making use of CMA. > http://processors.wiki.ti.com/index.php/CMEM_Overview > If we're at the point where we're discussing CMEM, I'd like to point out that ion (drivers/staging/android/ion) already provides an ioctl interface to allocate CMA and other types of memory. It's mostly used for Android as the name implies. I don't pretend the interface is perfect but it could be useful as a discussion point for allocation interfaces. Thanks, Laura -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
