The "linux" partition spans over the kernel and the complete rootfs for flashing. The maximum kernel size is 0x000bc000 (begin of "rootfs") minus 0x00040000 (begin of "linux") equals 0x0007c000 (496KB).
Maddes On 10.05.2010 23:34, edgar.sol...@web.de wrote: > are these sizes fixed or calculated according the space requirement? > Looks like the linux size is fixed, what is the maximum size for a > kernel on wrt54g? > > .. ede > > On 10.05.2010 23:28, Matthias Buecher / Germany wrote: >> Kernel and rootfs are in two different mtd partitions on the WRT54G: >> >> # dmesg >> ... >> Creating 5 MTD partitions on "Physically mapped flash": >> 0x00000000-0x00040000 : "cfe" >> 0x00040000-0x003f0000 : "linux" >> 0x000bc000-0x00210000 : "rootfs" >> mtd: partition "rootfs" doesn't start on an erase block boundary -- >> force read-only >> 0x003f0000-0x00400000 : "nvram" >> 0x00210000-0x003f0000 : "rootfs_data" >> ... >> >> So it is moved from "rootfs" to "linux" in this case. >> >> Maddes >> >> On 10.05.2010 22:53, edgar.sol...@web.de wrote: >>> but wouldn't the increase in the kernel image actually equal the >>> decrease in the squash image and therefore the size of the rootfs_data >>> stay the same? Both are lzma compressed. >>> >>> ..ede >>> >>> >>> On 10.05.2010 19:16, Matthias Buecher / Germany wrote: >>>> It may not downsize the packages themselves, but moving kernel mods from >>>> rootfs to the kernel image will reduce the rootfs size. Leaving more >>>> space for JFFS2 rootfs_data. >>>> >>>> Having a "K" setting for kernel options would be great. >>>> Will try to have a look at it during the next weeks. >>>> >>>> Thanks for all your help >>>> Maddes >>>> >>>> On 10.05.2010 17:20, edgar.sol...@web.de wrote: >>>>> there is partly in >>>>> https://dev.openwrt.org/browser/trunk/include/kernel-defaults.mk >>>>> line 101 >>>>> >>>>> you can actually add >>>>> CONFIG_KERNEL_* >>>>> entries to your .config and they are copied over as CONFIG_* to the >>>>> kernel config. All that's missing is a menuconfig interface for that. >>>>> >>>>> But at least for routers using lzma squashfs for the initial image this >>>>> will probably not downsize anything. >>>>> >>>>> .. ede >>>>> >>>>> >>>>> On 10.05.2010 16:19, Stefan Monnier wrote: >>>>>>> In 'make menuconfig' I included them with 'Y' instead of 'M'. >>>>>>> According to my (newbie) knowledge that adds them to the kernel image. >>>>>>> Can somebody please confirm my understanding? Or at least prove me >>>>>>> wrong? :D >>>>>> Damn! I thought you had found a clever way to get them compiled into >>>>>> the kernel. >>>>>> I still hope some day someone will write the extra code needed so that >>>>>> "make menuconfig" can be told to build some modules right into >>>>>> the kernel. >>>>>> >>>>>> >>>>>> Stefan >>>>>> >>>> _______________________________________________ >>>> 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 >> _______________________________________________ >> 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 _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
