Christophe, ----- Ursprüngliche Mail ----- > Von: "Christophe Leroy" <[email protected]> > Can you tell which PPC32 model/family you are using ? Is it mpc85xx or > and/or other variants ? Maybe we can look at keeping CONFIG_HIGHMEM or > find alternatives for that subset of PPC32 only.
Off the head, MPC8343 and QorIQ P1022. > > Could you also elaborate a bit on the kind of issues you forsee or fear > with applications and FPGA device drivers. Unfortunately, applications in this area often make certain assumptions about the amount or layout of memory. This becomes a bigger problem when using FPGA device drivers of questionable quality, which share memory between the kernel, userspace, and the device itself. These are mostly out-of-tree drivers, so that's my horse to ride, I'm just mentally preparing myself for "interesting" bugs that will need to be sorted out. > FWIW I sent out today a patch that removes CONFIG_HIGHMEM complely on > powerpc in order to get a better view of the impacted areas and allow > people to test what it looks like on their system without > CONFIG_HIGHMEM. See [1]. Oh, that was fast. :-) Thanks, //richard
