On 16.03.2018 19:03, John David Anglin wrote: > On 2018-03-16 1:58 PM, Matt Turner wrote: >> On Fri, Mar 16, 2018 at 10:44 AM, John David Anglin >> <dave.anglin@xxxxxxxx> wrote: >>> On 2018-03-16 1:29 PM, Matt Turner wrote: >>>> This week I succeeded in building a stripped-down kernel without >>>> mlong-calls (in Gentoo), but was unable to get anything to link >>>> without mlong-calls when CONFIG_PARISC_PAGE_SIZE_16KB=y. >>>> >>> I wouldn't recommend the above option. It affects alignment of some things >>> in kernel >>> and as you found it makes the kernel bigger. There are also some things in >>> userspace >>> that assume 4KB pages. >> I expect we're past the point where there are any significant >> obstacles to userspace support. Most platforms successfully support >> multiple page sizes these days. >> > But they don't have the problem we do with non equivalent aliasing. The data section starts on a > page boundary on parisc and it doesn't overlap text. I'd be astonished, if anything other than 4kB page size is able to boot to a login prompt. For example, I know the parisc PCI-specific code (dino,lba,...) still depends on 4kb page sizes. I've left the CONFIG options in the source in the hope somebody will try to finish >4kb page support at some point. Helge -- To unsubscribe from this list: send the line "unsubscribe linux-parisc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
