On Fri, Nov 8, 2013 at 7:44 AM, Rusty Russell <ru...@rustcorp.com.au> wrote: > Axel Lin <axel....@ingics.com> writes: >> 2013/11/7 Ming Lei <tom.leim...@gmail.com>: >>> Hi, >>> >>> On Thu, Nov 7, 2013 at 10:47 AM, Axel Lin <axel....@ingics.com> wrote: >>>> >>>> hi Ming, >>>> Seems CONFIG_PAGE_OFFSET is not configurabe in "make menuconfig". >>>> And I found CONFIG_PAGE_OFFSET=0xC0000000 for all below configs... >>>> $ make at91_dt_defconfig; grep CONFIG_PAGE_OFFSET .config >>>> $ make ep93xx_defconfig; grep CONFIG_PAGE_OFFSET .config >>>> $ make imx_v4_v5_defconfig; grep CONFIG_PAGE_OFFSET .config >>>> $ make mxs_defconfig; grep CONFIG_PAGE_OFFSET .config >>>> $ make omap2plus_defconfig; grep CONFIG_PAGE_OFFSET .config >>>> $ make s3c6400_defconfig; grep CONFIG_PAGE_OFFSET .config >>>> $ make at91x40_defconfig; grep CONFIG_PAGE_OFFSET .config >>>> ( at91x40_defconfig is also arm7tdmi ) >>> >>> Firstly it can be configured via VMSPLIT_3GVMSPLIT_2G/VMSPLIT_1G. >>> >>> Secondly, configurable or not isn't the point, and maybe some uclinux >>> platforms do not use CONFIG_PAGE_OFFSET at all, but they should >>> set it as a reasonable value or at least be below than the start link >>> address of vmlinux. >> >> Hi Ming, >> >> I found in arch/arm/include/asm/memory.h: >> CONFIG_PAGE_OFFSET is not used if !CONFIG_MMU. >> So looks like setting CONFIG_PAGE_OFFSET to other value still won't work. > > This seems like the simplest solution, but it may mean you still have > crap in /proc/kallsyms. > > Does it work for you?
Yes, it should work, but I am wondering if perf can work on uClinux. Axel, could you post your .config? Thanks, -- Ming Lei -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
