immortalwrt/target
Szabolcs Hubai e85d410a79 ramips: mt7621: use lzma-loader for D-Link DIR-860L B1
This device has trouble extracting big kernel from flash,
and supports LZMA compressed kernels only.

Using OpenWrt kernel loader saves us 64 KB compared to the dictionary
size limiting workaround.

Factory image sizes (commit: 5f126c541a) with "CONFIG_ALL_KMODS=y":
- original ("-d23", default): 4784188 bytes, LZMA ERROR 1
- with "-d19": 4915260, LZMA ERROR 1
- with "-d18": 4915260, diff to original: +128 KB
- with "-d17": 4980796, diff to original: +192 KB
- with this patch: 4849724, diff to original: +64 KB

To save some CPU cycle, use minimal compression ("-a0") for the LZMA
compressed uImage.

The most robust solution would use a different loader,
which reads the compressed kernel directly from the flash.
See the thread at [0] for more details!

[0] http://lists.infradead.org/pipermail/openwrt-devel/2020-April/022926.html

Signed-off-by: Szabolcs Hubai <szab.hu@gmail.com>
Tested-by: Stijn Segers <foss@volatilesystems.org>
[fixed identation]
Signed-off-by: David Bauer <mail@david-bauer.net>
2020-04-28 10:33:41 +08:00
..
imagebuilder target/imagebuilder: use multi-thread support for xz compression 2020-03-27 18:40:33 +08:00
linux ramips: mt7621: use lzma-loader for D-Link DIR-860L B1 2020-04-28 10:33:41 +08:00
sdk sdk: fix building external modules when CONFIG_STACK_VALIDATION=y 2020-03-27 18:35:03 +08:00
toolchain toolchain: update 2020-01-15 02:18:19 +08:00
Config.in target: make TESTING_KERNEL selectable 2020-04-14 23:56:07 +08:00
Makefile update target 2019-08-19 22:26:19 +08:00