This is a note to let you know that I've just added the patch titled kselftest: fix OOM in memory compaction test to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: kselftest-fix-oom-in-memory-compaction-test.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 4c1baad223906943b595a887305f2e8124821dad Mon Sep 17 00:00:00 2001 From: Arnd Bergmann <arnd@xxxxxxxx> Date: Tue, 9 Jan 2018 17:26:24 +0100 Subject: kselftest: fix OOM in memory compaction test From: Arnd Bergmann <arnd@xxxxxxxx> commit 4c1baad223906943b595a887305f2e8124821dad upstream. Running the compaction_test sometimes results in out-of-memory failures. When I debugged this, it turned out that the code to reset the number of hugepages to the initial value is simply broken since we write into an open sysctl file descriptor multiple times without seeking back to the start. Adding the lseek here fixes the problem. Cc: stable@xxxxxxxxxxxxxxx Reported-by: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx> Link: https://bugs.linaro.org/show_bug.cgi?id=3145 Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> Signed-off-by: Shuah Khan <shuahkh@xxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- tools/testing/selftests/vm/compaction_test.c | 2 ++ 1 file changed, 2 insertions(+) --- a/tools/testing/selftests/vm/compaction_test.c +++ b/tools/testing/selftests/vm/compaction_test.c @@ -137,6 +137,8 @@ int check_compaction(unsigned long mem_f printf("No of huge pages allocated = %d\n", (atoi(nr_hugepages))); + lseek(fd, 0, SEEK_SET); + if (write(fd, initial_nr_hugepages, strlen(initial_nr_hugepages)) != strlen(initial_nr_hugepages)) { perror("Failed to write value to /proc/sys/vm/nr_hugepages\n"); Patches currently in stable-queue which might be from arnd@xxxxxxxx are queue-4.14/kselftest-fix-oom-in-memory-compaction-test.patch queue-4.14/tracing-prevent-profile_all_branches-when-fortify_source-y.patch