On Fri, Jul 04, 2014 at 11:38:09AM +0200, Ralf Baechle wrote: > On Fri, Jul 04, 2014 at 10:06:01AM +0100, Paul Burton wrote: > > > > The actual piece of code that needs to be installed is tiny. So the page > > > could be shared between many threads. In fact a single page would > > > suffice for most processes and only threads would require more slots > > > than provided by a single page so more pags could be allocated or the > > > process could sleep until a slot becomes available. > > > > You just roughly described the v2 patch that we're replying to :) > > Can't be that wrong then :-) > > I seem to only have replies to that patch in my mail folder not the > patch itself. You can find it in patchwork if you're interested: http://patchwork.linux-mips.org/patch/6125/ > > > I'm also wondering how insane emulation would be. We already have the > > > capability to emulate a fair fraction of the instruction set. > > > > Yeah, and I'm reasonably sure we're going to need some more once MIPSr6 > > is supported. I guess (perhaps only for the short term?) it could be > > done in stages - if systems include ASEs or cop2 that the emulation > > didn't implement then it could fall back to the current emuframe code. > > And it's dependence on executable stackframe ... ...yup. > > I'm in 2 minds about this - it sounds crazy but perhaps it's the most > > sane option available :) > > Sanity is overrated anyway ;-) I had originally left this patch at the point I started considering implementing emulation for the whole ISA in the kernel, figuring I was going insane & should probably do something else for a while. Perhaps I shouldn't worry so much ;) Thanks, Paul
