Here I found my error rootcause: My Makefile add a Werror flag, So it wil build waring as error as the follow code ../arch/um/os-Linux/signal.c: In function \xe2\x80\x98sig_handler_common\xe2\x80\x99: ../arch/um/os-Linux/signal.c:51:1: error: the frame size of 2960 bytes is larger than 2048 bytes [-Werror=frame-larger-than=] } ^ ../arch/um/os-Linux/signal.c: In function \xe2\x80\x98timer_real_alarm_handler\xe2\x80\x99: ../arch/um/os-Linux/signal.c:95:1: error: the frame size of 2960 bytes is larger than 2048 bytes [-Werror=frame-larger-than=] } and I add the CONFIG_FRAME_WARN=4096 in arch/um/x86_64_defconfig so there was no error when I use make ARCH=um defconfig && make ARCH=um BUT I found the commit ff7b437f36b026dcd7351f86a90a0424c891dc06 has changed use make ARCH=um kunit_defconfig in kunit.py. So the error happened. Further More, I compare the different between use x86_64_defconfig and kunit_defconfig, there is a big difference. Can We use kunit_defconfig on the basis of the x86_64_defconfig ? If the answer is ok， I would like to help add this functions Brendan Higgins <brendanhiggins@xxxxxxxxxx> 于2020年7月28日周二 上午5:29写道： > > On Mon, Jul 27, 2020 at 3:01 AM Cixi Geng <gengcixi@xxxxxxxxx> wrote: > > > > Hi Brendan: > > When I run kunit test in um , it failed on kernel 5.8-rc* while > > succeeded in v5.7 with same configuration. is this a bug? > > > > Here is my operation: > > gcc version 7.5.0 (Ubuntu 7.5.0-3ubuntu1~18.04) > > > > the kunitconfig: > > Cixi.Geng:~/git-projects/torvals-linux$ cat .kunitconfig > > CONFIG_KUNIT=y > > CONFIG_KUNIT_TEST=y > > CONFIG_KUNIT_EXAMPLE_TEST=y > > > > command: > > Cixi.Geng:~/git-projects/torvals-linux$ ./tools/testing/kunit/kunit.py run > > > > the Error log: > > [17:51:14] Configuring KUnit Kernel ... > > [17:51:14] Building KUnit Kernel ... > > ERROR:root:b"make[1]: > > \xe8\xbf\x9b\xe5\x85\xa5\xe7\x9b\xae\xe5\xbd\x95\xe2\x80\x9c/home/cixi.geng1/git-projects/torvals-linux/.kunit\xe2\x80\x9d\n/home/cixi.geng1/git-projects/torvals-linux/Makefile:551: > > recipe for target 'outputmakefile' failed\nmake[1]: > > \xe7\xa6\xbb\xe5\xbc\x80\xe7\x9b\xae\xe5\xbd\x95\xe2\x80\x9c/home/cixi.geng1/git-projects/torvals-linux/.kunit\xe2\x80\x9d\nMakefile:185: > > recipe for target '__sub-make' failed\n" > > So we have a fix out for the cryptic error messages: > > https://patchwork.kernel.org/patch/11652711/ > > But I believe it has not been picked up yet. > > In the meantime, you should get more information by running > > ls .kunit > make ARCH=um O=.kunit > > Let us know if you have any additional questions.
