On 04/24/2017 06:19 PM, Kirill A. Shutemov wrote: > In proposed implementation, we also use hint address, but in different > way: by default, if hint address is NULL, kernel would not create mappings > above 47-bits, preserving compatibility. Ooooh, that would solve a lot of problems actually if it were to be available on all architectures. On SPARC, the situation is really annoying and I have been discussing a solution with the Qt developers and they suggested a similar approach, just one that would also apply to brk() [1]. > If an application wants to have access to larger address space, it has to > specify hint addess above 47-bits. > > See details here: > > http://lkml.kernel.org/r/20170420162147.86517-10-kirill.shutemov@xxxxxxxxxxxxxxx Thanks. I'll have a read. Although from your message I'm reading out that this particular proposal got rejected. Would be really nice to able to have a canonical solution for this issue, it's been biting us on SPARC for quite a while now due to the fact that virtual address space has been 52 bits on SPARC for a while now. Adrian > [1] https://bugreports.qt.io/browse/QTBUG-56264 -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer - glaubitz@xxxxxxxxxx `. `' Freie Universitaet Berlin - glaubitz@xxxxxxxxxxxxxxxxxxx `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
