On Thu, 27 Feb 2020 04:56:46 -0800 Richard Henderson <richard.hender...@linaro.org> wrote:
> On 2/27/20 4:31 AM, Alex Bennée wrote: > >> It does not make sense for a linux-user chroot, running make -jN, on just > >> about > >> any host. For linux-user, I could be happy with a modest increase, but > >> not all > >> the way out to 2GiB. > >> > >> Discuss. > > > > Does it matter that much? Surely for small programs the kernel just > > never pages in the used portions of the mmap? > > That's why I used the example of a build under the chroot, because the > compiler > is not a small program. > > Consider when the memory *is* used, and N * 2GB implies lots of paging, where > the previous N * 32MB did not. > > I'm saying that we should consider a setting more like 128MB or so, since the > value cannot be changed from the command-line, or through the environment. That's what BSD guys force tb-size to, to speed up system emulation. > > > r~ >
