Le 20/03/2024 à 17:09, Peter Xu a écrit : > On Wed, Mar 20, 2024 at 06:16:43AM +0000, Christophe Leroy wrote: >> At the first place that was to get a close fit between hardware >> pagetable topology and linux pagetable topology. But obviously we >> already stepped back for 512k pages, so let's go one more step aside and >> do similar with 8M pages. >> >> I'll give it a try and see how it goes. > > So you're talking about 8M only for 8xx, am I right? Yes I am. > > There seem to be other PowerPC systems use hugepd. Is it possible that we > convert all hugepd into cont_pte form? Indeed. Seems like we have hugepd for book3s/64 and for nohash. For book3s I don't know, may Aneesh can answer. For nohash I think it should be possible because TLB misses are handled by software. Even the e6500 which has a hardware tablewalk falls back on software walk when it is a hugepage IIUC. Christophe
