On Tue, Nov 07, 2017 at 07:15:58PM +0530, Aneesh Kumar K.V wrote: > > > > > If it is decided to keep these kind of heuristics, can we get just a > > small but reasonably precise description of each change to the > > interface and ways for using the new functionality, such that would be > > suitable for the man page? I couldn't fix powerpc because nothing > > matches and even Aneesh and you differ on some details (MAP_FIXED > > behaviour). > > > I would consider MAP_FIXED as my mistake. We never discussed this explicitly > and I kind of assumed it to behave the same way. ie, we search in lower > address space (128TB) if the hint addr is below 128TB. > > IIUC we agree on the below. > > 1) MAP_FIXED allow the addr to be used, even if hint addr is below 128TB but > hint_addr + len is > 128TB. > > 2) For everything else we search in < 128TB space if hint addr is below > 128TB > > 3) We don't switch to large address space if hint_addr + len > 128TB. The > decision to switch to large address space is primarily based on hint addr > > Is there any other rule we need to outline? Or is any of the above not > correct? That's correct. -- Kirill A. Shutemov
