On Mon, May 20, 2024 at 4:51 AM Russell Senior <russ...@personaltelco.net> wrote: > > (try#2, damn you gmail) > > I mentioned this on IRC and as a github comment on the commit > (https://github.com/openwrt/openwrt/commit/2967e24d02775f63d9e363e6e0d351716dcc3f7c) > > My build started failing on the commit. The message I get from the > build system is: > > "WARNING: Image file > /home/openwrt/src/lede/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/ubnt_edgerouter-x-kernel.bin > is too big: 3165615 > 3145728" > > I tried a vanilla config: > > CONFIG_TARGET_ramips=y > CONFIG_TARGET_ramips_mt7621=y > CONFIG_TARGET_ramips_mt7621_DEVICE_ubnt_edgerouter-x=y > CONFIG_DEVEL=y > CONFIG_BUILD_LOG=y > > "WARNING: Image file > /home/openwrt/src/lede/build_dir/target-mipsel_24kc_musl/linux-ramips_mt7621/ubnt_edgerouter-x-kernel.bin > is too big: 3165361 > 3145728" > > I notice that there are two kernel partitions on the NAND flash, each > of which is 3MB: > > [ 1.011604] 6 fixed-partitions partitions found on MTD device mt7621-nand > [ 1.025136] Creating 6 MTD partitions on "mt7621-nand": > [ 1.035552] 0x000000000000-0x000000080000 : "u-boot" > [ 1.054525] 0x000000080000-0x0000000e0000 : "u-boot-env" > [ 1.072180] 0x0000000e0000-0x000000140000 : "factory" > [ 1.089606] 0x000000140000-0x000000440000 : "kernel1" > [ 1.147424] 0x000000440000-0x000000740000 : "kernel2" > [ 1.204979] 0x000000740000-0x00000ff00000 : "ubi" > > Which suggests two possible fixes: > > a) cannibalize the second kernel parition (might require a different > u-boot?); or > > b) use an intermediate u-boot that looks for the kernel in a ubi partition. > > or > > c) make the damn kernel smaller. > > Thoughts?
d) Start looking into Zephyr as an alternative, until it may get too bloated (in 10-20-30 years?) On a similar note, there were these ar71xx tiny images (up until 2018), which (before) were just normal images (on which) OpenWrt would run on. i.e. the 4 MB flash, 32 MB RAM configuration (and maybe before that even 2 MB flash and 16 MB of RAM) When those (4/32 MB images) were dropped, it seemed (to me at least) to trigger this notion that Linux (the kernel), got fat. You can still fit a Linux kernel onto those old images, but it's (more) like a weight-loss exercise, which doesn't fit most users. There used to be this joke, that you can run linux on a potato [1] Oh well ¯\_(ツ)_/¯ [1] https://www.bbspot.com/News/2008/12/linux-on-a-potato.html (for your own amusement, there's also these) [2] https://www.bbspot.com/News/2001/06/gates.html [3] https://www.bbspot.com/News/2000/4/linux_distros.html [4] (this might be slightly offensive today, but ¯\_(ツ)_/¯ ) https://www.bbspot.com/News/2000/9/linux_laid.html > > -- > Russell Senior > russ...@personaltelco.net > > _______________________________________________ > openwrt-devel mailing list > openwrt-devel@lists.openwrt.org > https://lists.openwrt.org/mailman/listinfo/openwrt-devel _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
