On 15.10.21 18:28, David Hildenbrand wrote:
On 15.10.21 18:25, Shuah Khan wrote:
On 10/15/21 10:19 AM, David Hildenbrand wrote:
On 15.10.21 18:15, David Hildenbrand wrote:
On 15.10.21 18:06, David Hildenbrand wrote:
On 15.10.21 17:47, David Hildenbrand wrote:
On 15.10.21 17:45, Shuah Khan wrote: > On 9/18/21 1:41 AM, David Hildenbrand wrote: >> On 18.09.21 00:45, Shuah Khan wrote: >>> Hi David, >>> >>> I am running into the following warning when try to build this test: >>> >>> madv_populate.c:334:2: warning: #warning "missing MADV_POPULATE_READ or MADV_POPULATE_WRITE definition" [-Wcpp] >>> 334 | #warning "missing MADV_POPULATE_READ or MADV_POPULATE_WRITE definition" >>> | ^~~~~~~ >>> >>> >>> I see that the following handling is in place. However there is no >>> other information to explain why the check is necessary. >>> >>> #if defined(MADV_POPULATE_READ) && defined(MADV_POPULATE_WRITE) >>> >>> #else /* defined(MADV_POPULATE_READ) && defined(MADV_POPULATE_WRITE) */ >>> >>> #warning "missing MADV_POPULATE_READ or MADV_POPULATE_WRITE definition" >>> >>> I do see these defined in: >>> >>> include/uapi/asm-generic/mman-common.h:#define MADV_POPULATE_READ 22 >>> include/uapi/asm-generic/mman-common.h:#define MADV_POPULATE_WRITE 23 >>> >>> Is this the case of missing include from madv_populate.c? >> >> Hi Shuan, >> >> note that we're including "#include <sys/mman.h>", which in my >> understanding maps to the version installed on your system instead >> of the one in our build environment.ing. >> >> So as soon as you have a proper kernel + the proper headers installed >> and try to build, it would pick up MADV_POPULATE_READ and >> MADV_POPULATE_WRITE from the updated headers. That makes sense: you >> annot run any MADV_POPULATE_READ/MADV_POPULATE_WRITE tests on a kernel >> that doesn't support it. >> >> See vm/userfaultfd.c where we do something similar. >> > > Kselftest is for testing the kernel with kernel headers. That is the > reason why there is the dependency on header install. > >> >> As soon as we have a proper environment, it seems to work just fine: >> >> Linux vm-0 5.15.0-0.rc1.20210915git3ca706c189db.13.fc36.x86_64 #1 SMP Thu Sep 16 11:32:54 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux >> [root@vm-0 linux]# cat /etc/redhat-release >> Fedora release 36 (Rawhide) > > This is a distro release. We don't want to have dependency on headers > from the distro to run selftests. Hope this makes sense. > > I still see this on my test system running Linux 5.15-rc5.
Did you also install Linux headers? I assume no, correct?
What happens in your environment when compiling and running the memfd_secret test?
If assume you'll see a "skip" when executing, because it might also refer to the local version of linux headers and although it builds, it really cannot build something "functional". It just doesn't add a "#warning" to make that obvious.
The following works but looks extremely hackish.
diff --git a/tools/testing/selftests/vm/madv_populate.c b/tools/testing/selftests/vm/madv_populate.c index b959e4ebdad4..ab26163db540 100644 --- a/tools/testing/selftests/vm/madv_populate.c +++ b/tools/testing/selftests/vm/madv_populate.c @@ -14,12 +14,11 @@ #include <unistd.h> #include <errno.h> #include <fcntl.h> +#include "../../../../usr/include/linux/mman.h" #include <sys/mman.h>
#include "../kselftest.h"
-#if defined(MADV_POPULATE_READ) && defined(MADV_POPULATE_WRITE)
- /*
*/
- For now, we're using 2 MiB of private anonymous memory for all tests.
@@ -328,15 +327,3 @@ int main(int argc, char **argv) err, ksft_test_num()); return ksft_exit_pass(); }
-#else /* defined(MADV_POPULATE_READ) && defined(MADV_POPULATE_WRITE) */
-#warning "missing MADV_POPULATE_READ or MADV_POPULATE_WRITE definition"
-int main(int argc, char **argv) -{
ksft_print_header();ksft_exit_skip("MADV_POPULATE_READ or MADV_POPULATE_WRITE notdefined\n"); -}
-#endif /* defined(MADV_POPULATE_READ) && defined(MADV_POPULATE_WRITE) */
There has to be some clean way to achieve the same.
Sorry for the spam,
diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile index d9605bd10f2d..ce198b329ff5 100644 --- a/tools/testing/selftests/vm/Makefile +++ b/tools/testing/selftests/vm/Makefile @@ -23,7 +23,7 @@ MACHINE ?= $(shell echo $(uname_M) | sed -e 's/aarch64.*/arm64/' -e 's/ppc64.*/p # LDLIBS. MAKEFLAGS += --no-builtin-rules
-CFLAGS = -Wall -I ../../../../usr/include $(EXTRA_CFLAGS) +CFLAGS = -Wall -idirafter ../../../../usr/include $(EXTRA_CFLAGS) LDLIBS = -lrt -lpthread TEST_GEN_FILES = compaction_test TEST_GEN_FILES += gup_test
Seems to set the right include path priority.
Yes. It works on linux-next-20211012
Do you mind sending a me patch for this?
I just double-checked (after make clean) and there is still something wrong :( the only think that seems to work is the
+#include "../../../../usr/include/linux/mman.h" #include <sys/mman.h>
hack.
Using "-nostdinc" won't work because we need other headers :(
And ... I think I know the problem.
In ../../../../usr/include, there is no "sys" directory. It's called "linux".
But including <linux/mman.h> instead of <sys/mman.h> doesn't work either. The only thing that seems to work is
diff --git a/tools/testing/selftests/vm/madv_populate.c b/tools/testing/selftests/vm/madv_populate.c index b959e4ebdad4..3ee0e8275600 100644 --- a/tools/testing/selftests/vm/madv_populate.c +++ b/tools/testing/selftests/vm/madv_populate.c @@ -14,12 +14,11 @@ #include <unistd.h> #include <errno.h> #include <fcntl.h> +#include <linux/mman.h> #include <sys/mman.h>
#include "../kselftest.h"
-#if defined(MADV_POPULATE_READ) && defined(MADV_POPULATE_WRITE) - /* * For now, we're using 2 MiB of private anonymous memory for all tests. */ @@ -328,15 +327,3 @@ int main(int argc, char **argv) err, ksft_test_num()); return ksft_exit_pass(); } - -#else /* defined(MADV_POPULATE_READ) && defined(MADV_POPULATE_WRITE) */ - -#warning "missing MADV_POPULATE_READ or MADV_POPULATE_WRITE definition" - -int main(int argc, char **argv) -{ - ksft_print_header(); - ksft_exit_skip("MADV_POPULATE_READ or MADV_POPULATE_WRITE not defined\n"); -} - -#endif /* defined(MADV_POPULATE_READ) && defined(MADV_POPULATE_WRITE) */