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selftests/mm: rename guard-pages to guard-regions

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The feature formerly referred to as guard pages is more correctly referred
to as 'guard regions', as in fact no pages are ever allocated in the
process of installing the regions.

To avoid confusion, rename the tests accordingly.

[lorenzo.stoakes@oracle.com: fix guard regions invocation]
  Link: https://lkml.kernel.org/r/13426c71-d069-4407-9340-b227ff8b8736@lucifer.local
Link: https://lkml.kernel.org/r/1c3cd04a3f69b5756b94bda701ac88325a9be18b.1739469950.git.lorenzo.stoakes@oracle.com
Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: David Hildenbrand <david@redhat.com>
Cc: Jann Horn <jannh@google.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Kalesh Singh <kaleshsingh@google.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: "Paul E . McKenney" <paulmck@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Lorenzo Stoakes
2025-02-13 18:17:01 +00:00
committed by Andrew Morton
parent f807123d57
commit ce1c0824fc
4 changed files with 24 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files
tools/testing/selftests/mm/.gitignore
+1 -1
View File
@@ -57,4 +57,4 @@ droppable
hugetlb_dio
pkey_sighandler_tests_32
pkey_sighandler_tests_64
guard-pages
guard-regions
tools/testing/selftests/mm/Makefile
+1 -1
View File
@@ -97,7 +97,7 @@ TEST_GEN_FILES += hugetlb_fault_after_madv
TEST_GEN_FILES += hugetlb_madv_vs_map
TEST_GEN_FILES += hugetlb_dio
TEST_GEN_FILES += droppable
TEST_GEN_FILES += guard-pages
TEST_GEN_FILES += guard-regions
ifneq ($(ARCH),arm64)
TEST_GEN_FILES += soft-dirty
tools/testing/selftests/mm/guard-pages.c → tools/testing/selftests/mm/guard-regions.c
+21 -21
View File
@@ -107,12 +107,12 @@ static bool try_read_write_buf(char *ptr)
return try_read_buf(ptr) && try_write_buf(ptr);
}
FIXTURE(guard_pages)
FIXTURE(guard_regions)
{
unsigned long page_size;
};
FIXTURE_SETUP(guard_pages)
FIXTURE_SETUP(guard_regions)
{
struct sigaction act = {
.sa_handler = &handle_fatal,
@@ -126,7 +126,7 @@ FIXTURE_SETUP(guard_pages)
self->page_size = (unsigned long)sysconf(_SC_PAGESIZE);
};
FIXTURE_TEARDOWN(guard_pages)
FIXTURE_TEARDOWN(guard_regions)
{
struct sigaction act = {
.sa_handler = SIG_DFL,
@@ -137,7 +137,7 @@ FIXTURE_TEARDOWN(guard_pages)
sigaction(SIGSEGV, &act, NULL);
}
TEST_F(guard_pages, basic)
TEST_F(guard_regions, basic)
{
const unsigned long NUM_PAGES = 10;
const unsigned long page_size = self->page_size;
@@ -231,7 +231,7 @@ TEST_F(guard_pages, basic)
}
/* Assert that operations applied across multiple VMAs work as expected. */
TEST_F(guard_pages, multi_vma)
TEST_F(guard_regions, multi_vma)
{
const unsigned long page_size = self->page_size;
char *ptr_region, *ptr, *ptr1, *ptr2, *ptr3;
@@ -367,7 +367,7 @@ TEST_F(guard_pages, multi_vma)
* Assert that batched operations performed using process_madvise() work as
* expected.
*/
TEST_F(guard_pages, process_madvise)
TEST_F(guard_regions, process_madvise)
{
const unsigned long page_size = self->page_size;
pid_t pid = getpid();
@@ -467,7 +467,7 @@ TEST_F(guard_pages, process_madvise)
}
/* Assert that unmapping ranges does not leave guard markers behind. */
TEST_F(guard_pages, munmap)
TEST_F(guard_regions, munmap)
{
const unsigned long page_size = self->page_size;
char *ptr, *ptr_new1, *ptr_new2;
@@ -505,7 +505,7 @@ TEST_F(guard_pages, munmap)
}
/* Assert that mprotect() operations have no bearing on guard markers. */
TEST_F(guard_pages, mprotect)
TEST_F(guard_regions, mprotect)
{
const unsigned long page_size = self->page_size;
char *ptr;
@@ -553,7 +553,7 @@ TEST_F(guard_pages, mprotect)
}
/* Split and merge VMAs and make sure guard pages still behave. */
TEST_F(guard_pages, split_merge)
TEST_F(guard_regions, split_merge)
{
const unsigned long page_size = self->page_size;
char *ptr, *ptr_new;
@@ -684,7 +684,7 @@ TEST_F(guard_pages, split_merge)
}
/* Assert that MADV_DONTNEED does not remove guard markers. */
TEST_F(guard_pages, dontneed)
TEST_F(guard_regions, dontneed)
{
const unsigned long page_size = self->page_size;
char *ptr;
@@ -737,7 +737,7 @@ TEST_F(guard_pages, dontneed)
}
/* Assert that mlock()'ed pages work correctly with guard markers. */
TEST_F(guard_pages, mlock)
TEST_F(guard_regions, mlock)
{
const unsigned long page_size = self->page_size;
char *ptr;
@@ -810,7 +810,7 @@ TEST_F(guard_pages, mlock)
*
* - Moving a mapping alone should retain markers as they are.
*/
TEST_F(guard_pages, mremap_move)
TEST_F(guard_regions, mremap_move)
{
const unsigned long page_size = self->page_size;
char *ptr, *ptr_new;
@@ -857,7 +857,7 @@ TEST_F(guard_pages, mremap_move)
* will have to remove guard pages manually to fix up (they'd have to do the
* same if it were a PROT_NONE mapping).
*/
TEST_F(guard_pages, mremap_expand)
TEST_F(guard_regions, mremap_expand)
{
const unsigned long page_size = self->page_size;
char *ptr, *ptr_new;
@@ -920,7 +920,7 @@ TEST_F(guard_pages, mremap_expand)
* if the user were using a PROT_NONE mapping they'd have to manually fix this
* up also so this is OK.
*/
TEST_F(guard_pages, mremap_shrink)
TEST_F(guard_regions, mremap_shrink)
{
const unsigned long page_size = self->page_size;
char *ptr;
@@ -984,7 +984,7 @@ TEST_F(guard_pages, mremap_shrink)
* Assert that forking a process with VMAs that do not have VM_WIPEONFORK set
* retain guard pages.
*/
TEST_F(guard_pages, fork)
TEST_F(guard_regions, fork)
{
const unsigned long page_size = self->page_size;
char *ptr;
@@ -1039,7 +1039,7 @@ TEST_F(guard_pages, fork)
* Assert expected behaviour after we fork populated ranges of anonymous memory
* and then guard and unguard the range.
*/
TEST_F(guard_pages, fork_cow)
TEST_F(guard_regions, fork_cow)
{
const unsigned long page_size = self->page_size;
char *ptr;
@@ -1110,7 +1110,7 @@ TEST_F(guard_pages, fork_cow)
* Assert that forking a process with VMAs that do have VM_WIPEONFORK set
* behave as expected.
*/
TEST_F(guard_pages, fork_wipeonfork)
TEST_F(guard_regions, fork_wipeonfork)
{
const unsigned long page_size = self->page_size;
char *ptr;
@@ -1160,7 +1160,7 @@ TEST_F(guard_pages, fork_wipeonfork)
}
/* Ensure that MADV_FREE retains guard entries as expected. */
TEST_F(guard_pages, lazyfree)
TEST_F(guard_regions, lazyfree)
{
const unsigned long page_size = self->page_size;
char *ptr;
@@ -1196,7 +1196,7 @@ TEST_F(guard_pages, lazyfree)
}
/* Ensure that MADV_POPULATE_READ, MADV_POPULATE_WRITE behave as expected. */
TEST_F(guard_pages, populate)
TEST_F(guard_regions, populate)
{
const unsigned long page_size = self->page_size;
char *ptr;
@@ -1222,7 +1222,7 @@ TEST_F(guard_pages, populate)
}
/* Ensure that MADV_COLD, MADV_PAGEOUT do not remove guard markers. */
TEST_F(guard_pages, cold_pageout)
TEST_F(guard_regions, cold_pageout)
{
const unsigned long page_size = self->page_size;
char *ptr;
@@ -1268,7 +1268,7 @@ TEST_F(guard_pages, cold_pageout)
}
/* Ensure that guard pages do not break userfaultd. */
TEST_F(guard_pages, uffd)
TEST_F(guard_regions, uffd)
{
const unsigned long page_size = self->page_size;
int uffd;
tools/testing/selftests/mm/run_vmtests.sh
+1 -1
View File
@@ -395,7 +395,7 @@ CATEGORY="mremap" run_test ./mremap_dontunmap
CATEGORY="hmm" run_test bash ./test_hmm.sh smoke
# MADV_GUARD_INSTALL and MADV_GUARD_REMOVE tests
CATEGORY="madv_guard" run_test ./guard-pages
CATEGORY="madv_guard" run_test ./guard-regions
# MADV_POPULATE_READ and MADV_POPULATE_WRITE tests
CATEGORY="madv_populate" run_test ./madv_populate