Hi Damien, On Wed, Nov 25, 2020 at 7:14 AM Damien Le Moal <damien.lem...@wdc.com> wrote: > On 2020/11/25 3:57, Geert Uytterhoeven wrote: > > There is no need to enable Virtual Terminal support in the Canaan > > Kendryte K210 defconfigs, as no terminal devices are supported and > > enabled. Hence disable CONFIG_VT, and remove the no longer needed > > override for CONFIG_VGA_CONSOLE. > > > > This reduces kernel size by ca. 65 KiB. > > Indeed, nice saving. Just tested, and all is good.
I used my old script[1] to check the impact of disabling config options. I don't see any other low-hanging fruits: Disabling CONFIG_BLOCK saves 492890 bytes Disabling CONFIG_EXT4_FS saves 322528 bytes Disabling CONFIG_PRINTK saves 214612 bytes Disabling CONFIG_SMP saves 214486 bytes Disabling CONFIG_FRAME_POINTER saves 166368 bytes Disabling CONFIG_TTY saves 156618 bytes Disabling CONFIG_PROC_FS saves 110274 bytes Disabling CONFIG_MMC saves 87656 bytes Disabling CONFIG_VT saves 70350 bytes Disabling CONFIG_SYSFS saves 62298 bytes Disabling CONFIG_BUG saves 50882 bytes Disabling CONFIG_SPI saves 34420 bytes Disabling CONFIG_SOC_CANAAN saves 34286 bytes Disabling CONFIG_I2C saves 34086 bytes Disabling CONFIG_PROC_SYSCTL saves 23890 bytes Disabling CONFIG_POSIX_TIMERS saves 18388 bytes Disabling CONFIG_I2C_DESIGNWARE_PLATFORM saves 17530 bytes Disabling CONFIG_MMC_BLOCK saves 17200 bytes Disabling CONFIG_UNIX98_PTYS saves 16360 bytes Disabling CONFIG_MULTIUSER saves 16148 bytes Disabling CONFIG_NEW_LEDS saves 15964 bytes Disabling CONFIG_SPI_DESIGNWARE saves 15434 bytes Disabling CONFIG_GPIO_CDEV saves 15352 bytes Disabling CONFIG_MMC_SPI saves 14754 bytes Disabling CONFIG_SOC_CANAAN_K210_DTB_BUILTIN saves 13864 bytes (Yes, I have ext4 enabled ;-) I haven't done enough riscv kernel development yet to assess if I need CONFIG_FRAME_POINTER or not. [1] https://github.com/geertu/linux-scripts/blob/master/linux-analyze-marginal-sizes Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- ge...@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
