+ selftests-vm-compaction_test-fix-write-to-restore-nr_hugepages.patch added to -mm tree

[akpm@linux-foundation.org]

The patch titled
     Subject: selftests/vm/compaction_test: fix write to restore nr_hugepages
has been added to the -mm tree.  Its filename is
     selftests-vm-compaction_test-fix-write-to-restore-nr_hugepages.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/selftests-vm-compaction_test-fix-write-to-restore-nr_hugepages.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/selftests-vm-compaction_test-fix-write-to-restore-nr_hugepages.patch

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------------------------------------------------------
From: Mike Kravetz <mike.kravetz@oracle.com>
Subject: selftests/vm/compaction_test: fix write to restore nr_hugepages

The write at the end of the test to restore nr_hugepages to its previous
value is failing.  This is because it is trying to write the number of
bytes in the char array as opposed to the number of bytes in the string.

Link: http://lkml.kernel.org/r/1465331205-3284-1-git-send-email-mike.kravetz@oracle.com
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Sri Jayaramappa <sjayaram@akamai.com>
Cc: Eric B Munson <emunson@akamai.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 tools/testing/selftests/vm/compaction_test.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -puN tools/testing/selftests/vm/compaction_test.c~selftests-vm-compaction_test-fix-write-to-restore-nr_hugepages tools/testing/selftests/vm/compaction_test.c
--- a/tools/testing/selftests/vm/compaction_test.c~selftests-vm-compaction_test-fix-write-to-restore-nr_hugepages
+++ a/tools/testing/selftests/vm/compaction_test.c
@@ -136,7 +136,7 @@ int check_compaction(unsigned long mem_f
 	printf("No of huge pages allocated = %d\n",
 	       (atoi(nr_hugepages)));
 
-	if (write(fd, initial_nr_hugepages, sizeof(initial_nr_hugepages))
+	if (write(fd, initial_nr_hugepages, strlen(initial_nr_hugepages))
 	    != strlen(initial_nr_hugepages)) {
 		perror("Failed to write to /proc/sys/vm/nr_hugepages\n");
 		goto close_fd;
_

Patches currently in -mm which might be from mike.kravetz@oracle.com are

mm-hugetlb-fix-huge-page-reserve-accounting-for-private-mappings.patch
selftests-vm-compaction_test-fix-write-to-restore-nr_hugepages.patch