2010/5/10 Bernhard Loos <bernhardl...@googlemail.com>: > 2010/5/10 Matthias Buecher / Germany <m...@maddes.net>: >> 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 > > This is not the maximum kernel size, it's only the current kernel size. > You could probably get a few kb more flash space (32 at average) by > changing the aligment of the rootfs, squashfs is read only, so it > doesn't have to start at an erase block boundary.
To clarify myself, the size is calculated dynamically, so compiling stuff into the kernel doesn't gain much. >> >> 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 >> > _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
