On Sat, Mar 28, 2026 at 02:03:11PM -0700, Andrew Morton wrote: > On Sat, 28 Mar 2026 13:56:50 -0700 Andrew Morton <[email protected]> > wrote: > > > On Sat, 28 Mar 2026 10:12:06 +0800 Li Wang <[email protected]> wrote: > > > > > > from the top level? > > > > > > Should use: > > > > > > make kselftest > > > > I'm probably doing something wrong, but `make -j50 kselftest-all' > appears to have scribbled on my top-level Makefile, so now I'm getting > > ts:/usr/src/25> make kselftest-all > /usr/src/25/Makefile:5: *** Too many open files. Stop. > > ts:/usr/src/25> cat Makefile > # Automatically generated by /usr/src/25/Makefile: don't edit > export KBUILD_OUTPUT = . > export KBUILD_EXTMOD = /usr/src/25 > export KBUILD_EXTMOD_OUTPUT = /usr/src/25 > include /usr/src/25/Makefile > > I've done this twice in succession now. Any suggestions where I should > look?
When build selftests from the top-level, sub-makes entered via `-C` may still inherit the caller's PWD from the environment. Some selftests use $(PWD) in recursive kbuild invocations, which can then incorrectly resolve to the kernel top directory instead of the current test directory. Maybe try export PWD in the ../selftests/lib.mk? export PWD := $(CURDIR) -- Regards, Li Wang
