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supported_devices:864_warning [2021/02/04 16:09] – [Usability issues] tmomassupported_devices:864_warning [2022/10/29 05:52] – [Analysis of firmware size growth] Update for 22.03 hnyman
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   * If you want to be sure you can install at least a few additional software packages, **16MB (or more) of flash** and **128MB (or more) of RAM** are the recommended choice.   * If you want to be sure you can install at least a few additional software packages, **16MB (or more) of flash** and **128MB (or more) of RAM** are the recommended choice.
  
-As the current OpenWrt master (and the forthcoming 20.releaseuses kernel 5.4 that is roughly 0.5 MB larger than the kernel 4.14 used in the old 19.07.x releases, the free flash space available on 8MB flash systems will be rather small in the next OpenWrt releasesMost likely also SSL/HTTPS will be soon enabled by default, which libraries will need at least some 0.3 MB flash space.+As the current stable 21.02 release uses kernel 5.4 that is roughly 0.5 MB larger than the kernel 4.14 used in the old 19.07.x releases, and SSL/HTTPS has been enabled by default needing at least some 0.3 MB flash space for the SSL libraries, the free flash space available on 8MB flash systems will be rather small in the current OpenWrt 21.02 release. OpenWrt master has already partially moved to kernel 5.10, which is still larger
  
 Flash space is also needed for bootloader (u-boot, etc.), bootloader settings, wifi firmware/calibration data, possible OEM settings (for ability to revert to OEM firmware) and for the jffs2/ubifs overlay space (OpenWRT config storage). Thus the maximum available flash size e.g. in a 8MB flash is actually typically 7MB or less. Flash space is also needed for bootloader (u-boot, etc.), bootloader settings, wifi firmware/calibration data, possible OEM settings (for ability to revert to OEM firmware) and for the jffs2/ubifs overlay space (OpenWRT config storage). Thus the maximum available flash size e.g. in a 8MB flash is actually typically 7MB or less.
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 **16/64 as an //absolute// minimum for any device, with at least 128 MB of RAM being preferred.**   **16/64 as an //absolute// minimum for any device, with at least 128 MB of RAM being preferred.**  
  
-Users should expect that devices with less than 16 MB of flash and/or 64 MB of RAM may be unstable in basic operation under the current version of OpenWrt (19.07.x and newer). They should further expect that support for the device may be dropped in future.+Users should expect that devices with less than 16 MB of flash and/or 64 MB of RAM may be unstable in basic operation under the current version of OpenWrt (19.07.x, 21.02.x and newer). They should further expect that support for the device may be dropped in future.
  
 ===== Analysis of firmware size growth ===== ===== Analysis of firmware size growth =====
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 <code> <code>
-master / 20.x4736.KB +master:        5824.3 KB (snapshot without LuCI) 
-19.07.3:       4096.3 KB+22.03.2      5952.3 KB 
 +21.02.5:       5312.3 KB 
 +19.07.8:       4096.3 KB
 18.06.8:       3712.0 KB 18.06.8:       3712.0 KB
 17.01.7:       3584.0 KB 17.01.7:       3584.0 KB
  • Last modified: 2024/12/05 19:35
  • by palebloodsky