* [PATCH v3 01/10] iov_iter: Fix some checkpatch complaints in kunit tests
2023-09-22 11:30 [PATCH v3 00/10] iov_iter: kunit: Cleanup, abstraction and more tests David Howells
@ 2023-09-22 11:30 ` David Howells
2023-09-22 11:30 ` [PATCH v3 02/10] iov_iter: Consolidate some of the repeated code into helpers David Howells
` (8 subsequent siblings)
9 siblings, 0 replies; 15+ messages in thread
From: David Howells @ 2023-09-22 11:30 UTC (permalink / raw)
To: Jens Axboe
Cc: David Howells, Al Viro, Linus Torvalds, Christoph Hellwig,
Christian Brauner, David Laight, Matthew Wilcox, Brendan Higgins,
David Gow, linux-fsdevel, linux-block, linux-mm, netdev,
linux-kselftest, kunit-dev, linux-kernel, Johannes Thumshirn,
Christian Brauner, David Hildenbrand, John Hubbard
Fix some checkpatch complaints in the new iov_iter kunit tests:
(1) Some lines had eight spaces instead of a tab at the start.
(2) Checkpatch doesn't like (void*)(unsigned long)0xnnnnnULL, so switch to
using POISON_POINTER_DELTA plus an offset instead.
Reported-by: Johannes Thumshirn <Johannes.Thumshirn@wdc.com>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Christoph Hellwig <hch@lst.de>
cc: Christian Brauner <brauner@kernel.org>
cc: Jens Axboe <axboe@kernel.dk>
cc: Al Viro <viro@zeniv.linux.org.uk>
cc: David Hildenbrand <david@redhat.com>
cc: John Hubbard <jhubbard@nvidia.com>
cc: Brendan Higgins <brendanhiggins@google.com>
cc: David Gow <davidgow@google.com>
cc: linux-kselftest@vger.kernel.org
cc: kunit-dev@googlegroups.com
cc: linux-mm@kvack.org
cc: linux-fsdevel@vger.kernel.org
---
lib/kunit_iov_iter.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/lib/kunit_iov_iter.c b/lib/kunit_iov_iter.c
index 859b67c4d697..4a6c0efd33f5 100644
--- a/lib/kunit_iov_iter.c
+++ b/lib/kunit_iov_iter.c
@@ -53,7 +53,7 @@ static void *__init iov_kunit_create_buffer(struct kunit *test,
void *buffer;
pages = kunit_kcalloc(test, npages, sizeof(struct page *), GFP_KERNEL);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pages);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pages);
*ppages = pages;
got = alloc_pages_bulk_array(GFP_KERNEL, npages, pages);
@@ -63,7 +63,7 @@ static void *__init iov_kunit_create_buffer(struct kunit *test,
}
buffer = vmap(pages, npages, VM_MAP | VM_MAP_PUT_PAGES, PAGE_KERNEL);
- KUNIT_ASSERT_NOT_ERR_OR_NULL(test, buffer);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, buffer);
kunit_add_action_or_reset(test, iov_kunit_unmap, buffer);
return buffer;
@@ -548,7 +548,7 @@ static void __init iov_kunit_extract_pages_kvec(struct kunit *test)
size_t offset0 = LONG_MAX;
for (i = 0; i < ARRAY_SIZE(pagelist); i++)
- pagelist[i] = (void *)(unsigned long)0xaa55aa55aa55aa55ULL;
+ pagelist[i] = (void *)POISON_POINTER_DELTA + 0x5a;
len = iov_iter_extract_pages(&iter, &pages, 100 * 1024,
ARRAY_SIZE(pagelist), 0, &offset0);
@@ -626,7 +626,7 @@ static void __init iov_kunit_extract_pages_bvec(struct kunit *test)
size_t offset0 = LONG_MAX;
for (i = 0; i < ARRAY_SIZE(pagelist); i++)
- pagelist[i] = (void *)(unsigned long)0xaa55aa55aa55aa55ULL;
+ pagelist[i] = (void *)POISON_POINTER_DELTA + 0x5a;
len = iov_iter_extract_pages(&iter, &pages, 100 * 1024,
ARRAY_SIZE(pagelist), 0, &offset0);
@@ -709,7 +709,7 @@ static void __init iov_kunit_extract_pages_xarray(struct kunit *test)
size_t offset0 = LONG_MAX;
for (i = 0; i < ARRAY_SIZE(pagelist); i++)
- pagelist[i] = (void *)(unsigned long)0xaa55aa55aa55aa55ULL;
+ pagelist[i] = (void *)POISON_POINTER_DELTA + 0x5a;
len = iov_iter_extract_pages(&iter, &pages, 100 * 1024,
ARRAY_SIZE(pagelist), 0, &offset0);
^ permalink raw reply related [flat|nested] 15+ messages in thread* [PATCH v3 02/10] iov_iter: Consolidate some of the repeated code into helpers
2023-09-22 11:30 [PATCH v3 00/10] iov_iter: kunit: Cleanup, abstraction and more tests David Howells
2023-09-22 11:30 ` [PATCH v3 01/10] iov_iter: Fix some checkpatch complaints in kunit tests David Howells
@ 2023-09-22 11:30 ` David Howells
2023-09-22 11:30 ` [PATCH v3 03/10] iov_iter: Consolidate the test vector struct in the kunit tests David Howells
` (7 subsequent siblings)
9 siblings, 0 replies; 15+ messages in thread
From: David Howells @ 2023-09-22 11:30 UTC (permalink / raw)
To: Jens Axboe
Cc: David Howells, Al Viro, Linus Torvalds, Christoph Hellwig,
Christian Brauner, David Laight, Matthew Wilcox, Brendan Higgins,
David Gow, linux-fsdevel, linux-block, linux-mm, netdev,
linux-kselftest, kunit-dev, linux-kernel, Christian Brauner,
David Hildenbrand, John Hubbard
Consolidate some of the repeated code snippets into helper functions to
reduce the line count.
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Christoph Hellwig <hch@lst.de>
cc: Christian Brauner <brauner@kernel.org>
cc: Jens Axboe <axboe@kernel.dk>
cc: Al Viro <viro@zeniv.linux.org.uk>
cc: David Hildenbrand <david@redhat.com>
cc: John Hubbard <jhubbard@nvidia.com>
cc: Brendan Higgins <brendanhiggins@google.com>
cc: David Gow <davidgow@google.com>
cc: linux-kselftest@vger.kernel.org
cc: kunit-dev@googlegroups.com
cc: linux-mm@kvack.org
cc: linux-fsdevel@vger.kernel.org
---
lib/kunit_iov_iter.c | 189 +++++++++++++++++++------------------------
1 file changed, 84 insertions(+), 105 deletions(-)
diff --git a/lib/kunit_iov_iter.c b/lib/kunit_iov_iter.c
index 4a6c0efd33f5..ee586eb652b4 100644
--- a/lib/kunit_iov_iter.c
+++ b/lib/kunit_iov_iter.c
@@ -19,18 +19,18 @@ MODULE_AUTHOR("David Howells <dhowells@redhat.com>");
MODULE_LICENSE("GPL");
struct kvec_test_range {
- int from, to;
+ int page, from, to;
};
static const struct kvec_test_range kvec_test_ranges[] = {
- { 0x00002, 0x00002 },
- { 0x00027, 0x03000 },
- { 0x05193, 0x18794 },
- { 0x20000, 0x20000 },
- { 0x20000, 0x24000 },
- { 0x24000, 0x27001 },
- { 0x29000, 0xffffb },
- { 0xffffd, 0xffffe },
+ { 0, 0x00002, 0x00002 },
+ { 0, 0x00027, 0x03000 },
+ { 0, 0x05193, 0x18794 },
+ { 0, 0x20000, 0x20000 },
+ { 0, 0x20000, 0x24000 },
+ { 0, 0x24000, 0x27001 },
+ { 0, 0x29000, 0xffffb },
+ { 0, 0xffffd, 0xffffe },
{ -1 }
};
@@ -69,6 +69,57 @@ static void *__init iov_kunit_create_buffer(struct kunit *test,
return buffer;
}
+/*
+ * Build the reference pattern in the scratch buffer that we expect to see in
+ * the iterator buffer (ie. the result of copy *to*).
+ */
+static void iov_kunit_build_to_reference_pattern(struct kunit *test, u8 *scratch,
+ size_t bufsize,
+ const struct kvec_test_range *pr)
+{
+ int i, patt = 0;
+
+ memset(scratch, 0, bufsize);
+ for (; pr->page >= 0; pr++)
+ for (i = pr->from; i < pr->to; i++)
+ scratch[i] = pattern(patt++);
+}
+
+/*
+ * Build the reference pattern in the iterator buffer that we expect to see in
+ * the scratch buffer (ie. the result of copy *from*).
+ */
+static void iov_kunit_build_from_reference_pattern(struct kunit *test, u8 *buffer,
+ size_t bufsize,
+ const struct kvec_test_range *pr)
+{
+ size_t i = 0, j;
+
+ memset(buffer, 0, bufsize);
+ for (; pr->page >= 0; pr++) {
+ for (j = pr->from; j < pr->to; j++) {
+ buffer[i++] = pattern(j);
+ if (i >= bufsize)
+ return;
+ }
+ }
+}
+
+/*
+ * Compare two kernel buffers to see that they're the same.
+ */
+static void iov_kunit_check_pattern(struct kunit *test, const u8 *buffer,
+ const u8 *scratch, size_t bufsize)
+{
+ size_t i;
+
+ for (i = 0; i < bufsize; i++) {
+ KUNIT_EXPECT_EQ_MSG(test, buffer[i], scratch[i], "at i=%x", i);
+ if (buffer[i] != scratch[i])
+ return;
+ }
+}
+
static void __init iov_kunit_load_kvec(struct kunit *test,
struct iov_iter *iter, int dir,
struct kvec *kvec, unsigned int kvmax,
@@ -79,7 +130,7 @@ static void __init iov_kunit_load_kvec(struct kunit *test,
int i;
for (i = 0; i < kvmax; i++, pr++) {
- if (pr->from < 0)
+ if (pr->page < 0)
break;
KUNIT_ASSERT_GE(test, pr->to, pr->from);
KUNIT_ASSERT_LE(test, pr->to, bufsize);
@@ -97,13 +148,12 @@ static void __init iov_kunit_load_kvec(struct kunit *test,
*/
static void __init iov_kunit_copy_to_kvec(struct kunit *test)
{
- const struct kvec_test_range *pr;
struct iov_iter iter;
struct page **spages, **bpages;
struct kvec kvec[8];
u8 *scratch, *buffer;
size_t bufsize, npages, size, copied;
- int i, patt;
+ int i;
bufsize = 0x100000;
npages = bufsize / PAGE_SIZE;
@@ -125,20 +175,8 @@ static void __init iov_kunit_copy_to_kvec(struct kunit *test)
KUNIT_EXPECT_EQ(test, iter.count, 0);
KUNIT_EXPECT_EQ(test, iter.nr_segs, 0);
- /* Build the expected image in the scratch buffer. */
- patt = 0;
- memset(scratch, 0, bufsize);
- for (pr = kvec_test_ranges; pr->from >= 0; pr++)
- for (i = pr->from; i < pr->to; i++)
- scratch[i] = pattern(patt++);
-
- /* Compare the images */
- for (i = 0; i < bufsize; i++) {
- KUNIT_EXPECT_EQ_MSG(test, buffer[i], scratch[i], "at i=%x", i);
- if (buffer[i] != scratch[i])
- return;
- }
-
+ iov_kunit_build_to_reference_pattern(test, scratch, bufsize, kvec_test_ranges);
+ iov_kunit_check_pattern(test, buffer, scratch, bufsize);
KUNIT_SUCCEED();
}
@@ -147,13 +185,12 @@ static void __init iov_kunit_copy_to_kvec(struct kunit *test)
*/
static void __init iov_kunit_copy_from_kvec(struct kunit *test)
{
- const struct kvec_test_range *pr;
struct iov_iter iter;
struct page **spages, **bpages;
struct kvec kvec[8];
u8 *scratch, *buffer;
size_t bufsize, npages, size, copied;
- int i, j;
+ int i;
bufsize = 0x100000;
npages = bufsize / PAGE_SIZE;
@@ -175,25 +212,8 @@ static void __init iov_kunit_copy_from_kvec(struct kunit *test)
KUNIT_EXPECT_EQ(test, iter.count, 0);
KUNIT_EXPECT_EQ(test, iter.nr_segs, 0);
- /* Build the expected image in the main buffer. */
- i = 0;
- memset(buffer, 0, bufsize);
- for (pr = kvec_test_ranges; pr->from >= 0; pr++) {
- for (j = pr->from; j < pr->to; j++) {
- buffer[i++] = pattern(j);
- if (i >= bufsize)
- goto stop;
- }
- }
-stop:
-
- /* Compare the images */
- for (i = 0; i < bufsize; i++) {
- KUNIT_EXPECT_EQ_MSG(test, scratch[i], buffer[i], "at i=%x", i);
- if (scratch[i] != buffer[i])
- return;
- }
-
+ iov_kunit_build_from_reference_pattern(test, buffer, bufsize, kvec_test_ranges);
+ iov_kunit_check_pattern(test, buffer, scratch, bufsize);
KUNIT_SUCCEED();
}
@@ -210,7 +230,7 @@ static const struct bvec_test_range bvec_test_ranges[] = {
{ 5, 0x0000, 0x1000 },
{ 6, 0x0000, 0x0ffb },
{ 6, 0x0ffd, 0x0ffe },
- { -1, -1, -1 }
+ { -1 }
};
static void __init iov_kunit_load_bvec(struct kunit *test,
@@ -225,7 +245,7 @@ static void __init iov_kunit_load_bvec(struct kunit *test,
int i;
for (i = 0; i < bvmax; i++, pr++) {
- if (pr->from < 0)
+ if (pr->page < 0)
break;
KUNIT_ASSERT_LT(test, pr->page, npages);
KUNIT_ASSERT_LT(test, pr->page * PAGE_SIZE, bufsize);
@@ -288,20 +308,14 @@ static void __init iov_kunit_copy_to_bvec(struct kunit *test)
b = 0;
patt = 0;
memset(scratch, 0, bufsize);
- for (pr = bvec_test_ranges; pr->from >= 0; pr++, b++) {
+ for (pr = bvec_test_ranges; pr->page >= 0; pr++, b++) {
u8 *p = scratch + pr->page * PAGE_SIZE;
for (i = pr->from; i < pr->to; i++)
p[i] = pattern(patt++);
}
- /* Compare the images */
- for (i = 0; i < bufsize; i++) {
- KUNIT_EXPECT_EQ_MSG(test, buffer[i], scratch[i], "at i=%x", i);
- if (buffer[i] != scratch[i])
- return;
- }
-
+ iov_kunit_check_pattern(test, buffer, scratch, bufsize);
KUNIT_SUCCEED();
}
@@ -341,7 +355,7 @@ static void __init iov_kunit_copy_from_bvec(struct kunit *test)
/* Build the expected image in the main buffer. */
i = 0;
memset(buffer, 0, bufsize);
- for (pr = bvec_test_ranges; pr->from >= 0; pr++) {
+ for (pr = bvec_test_ranges; pr->page >= 0; pr++) {
size_t patt = pr->page * PAGE_SIZE;
for (j = pr->from; j < pr->to; j++) {
@@ -352,13 +366,7 @@ static void __init iov_kunit_copy_from_bvec(struct kunit *test)
}
stop:
- /* Compare the images */
- for (i = 0; i < bufsize; i++) {
- KUNIT_EXPECT_EQ_MSG(test, scratch[i], buffer[i], "at i=%x", i);
- if (scratch[i] != buffer[i])
- return;
- }
-
+ iov_kunit_check_pattern(test, buffer, scratch, bufsize);
KUNIT_SUCCEED();
}
@@ -409,7 +417,7 @@ static void __init iov_kunit_copy_to_xarray(struct kunit *test)
struct page **spages, **bpages;
u8 *scratch, *buffer;
size_t bufsize, npages, size, copied;
- int i, patt;
+ int i;
bufsize = 0x100000;
npages = bufsize / PAGE_SIZE;
@@ -426,7 +434,7 @@ static void __init iov_kunit_copy_to_xarray(struct kunit *test)
iov_kunit_load_xarray(test, &iter, READ, xarray, bpages, npages);
i = 0;
- for (pr = kvec_test_ranges; pr->from >= 0; pr++) {
+ for (pr = kvec_test_ranges; pr->page >= 0; pr++) {
size = pr->to - pr->from;
KUNIT_ASSERT_LE(test, pr->to, bufsize);
@@ -439,20 +447,8 @@ static void __init iov_kunit_copy_to_xarray(struct kunit *test)
i += size;
}
- /* Build the expected image in the scratch buffer. */
- patt = 0;
- memset(scratch, 0, bufsize);
- for (pr = kvec_test_ranges; pr->from >= 0; pr++)
- for (i = pr->from; i < pr->to; i++)
- scratch[i] = pattern(patt++);
-
- /* Compare the images */
- for (i = 0; i < bufsize; i++) {
- KUNIT_EXPECT_EQ_MSG(test, buffer[i], scratch[i], "at i=%x", i);
- if (buffer[i] != scratch[i])
- return;
- }
-
+ iov_kunit_build_to_reference_pattern(test, scratch, bufsize, kvec_test_ranges);
+ iov_kunit_check_pattern(test, buffer, scratch, bufsize);
KUNIT_SUCCEED();
}
@@ -467,7 +463,7 @@ static void __init iov_kunit_copy_from_xarray(struct kunit *test)
struct page **spages, **bpages;
u8 *scratch, *buffer;
size_t bufsize, npages, size, copied;
- int i, j;
+ int i;
bufsize = 0x100000;
npages = bufsize / PAGE_SIZE;
@@ -484,7 +480,7 @@ static void __init iov_kunit_copy_from_xarray(struct kunit *test)
iov_kunit_load_xarray(test, &iter, READ, xarray, bpages, npages);
i = 0;
- for (pr = kvec_test_ranges; pr->from >= 0; pr++) {
+ for (pr = kvec_test_ranges; pr->page >= 0; pr++) {
size = pr->to - pr->from;
KUNIT_ASSERT_LE(test, pr->to, bufsize);
@@ -497,25 +493,8 @@ static void __init iov_kunit_copy_from_xarray(struct kunit *test)
i += size;
}
- /* Build the expected image in the main buffer. */
- i = 0;
- memset(buffer, 0, bufsize);
- for (pr = kvec_test_ranges; pr->from >= 0; pr++) {
- for (j = pr->from; j < pr->to; j++) {
- buffer[i++] = pattern(j);
- if (i >= bufsize)
- goto stop;
- }
- }
-stop:
-
- /* Compare the images */
- for (i = 0; i < bufsize; i++) {
- KUNIT_EXPECT_EQ_MSG(test, scratch[i], buffer[i], "at i=%x", i);
- if (scratch[i] != buffer[i])
- return;
- }
-
+ iov_kunit_build_from_reference_pattern(test, buffer, bufsize, kvec_test_ranges);
+ iov_kunit_check_pattern(test, buffer, scratch, bufsize);
KUNIT_SUCCEED();
}
@@ -573,7 +552,7 @@ static void __init iov_kunit_extract_pages_kvec(struct kunit *test)
while (from == pr->to) {
pr++;
from = pr->from;
- if (from < 0)
+ if (pr->page < 0)
goto stop;
}
ix = from / PAGE_SIZE;
@@ -651,7 +630,7 @@ static void __init iov_kunit_extract_pages_bvec(struct kunit *test)
while (from == pr->to) {
pr++;
from = pr->from;
- if (from < 0)
+ if (pr->page < 0)
goto stop;
}
ix = pr->page + from / PAGE_SIZE;
@@ -698,7 +677,7 @@ static void __init iov_kunit_extract_pages_xarray(struct kunit *test)
iov_kunit_create_buffer(test, &bpages, npages);
iov_kunit_load_xarray(test, &iter, READ, xarray, bpages, npages);
- for (pr = kvec_test_ranges; pr->from >= 0; pr++) {
+ for (pr = kvec_test_ranges; pr->page >= 0; pr++) {
from = pr->from;
size = pr->to - from;
KUNIT_ASSERT_LE(test, pr->to, bufsize);
^ permalink raw reply related [flat|nested] 15+ messages in thread* [PATCH v3 03/10] iov_iter: Consolidate the test vector struct in the kunit tests
2023-09-22 11:30 [PATCH v3 00/10] iov_iter: kunit: Cleanup, abstraction and more tests David Howells
2023-09-22 11:30 ` [PATCH v3 01/10] iov_iter: Fix some checkpatch complaints in kunit tests David Howells
2023-09-22 11:30 ` [PATCH v3 02/10] iov_iter: Consolidate some of the repeated code into helpers David Howells
@ 2023-09-22 11:30 ` David Howells
2023-09-22 11:30 ` [PATCH v3 04/10] iov_iter: Consolidate bvec pattern checking David Howells
` (6 subsequent siblings)
9 siblings, 0 replies; 15+ messages in thread
From: David Howells @ 2023-09-22 11:30 UTC (permalink / raw)
To: Jens Axboe
Cc: David Howells, Al Viro, Linus Torvalds, Christoph Hellwig,
Christian Brauner, David Laight, Matthew Wilcox, Brendan Higgins,
David Gow, linux-fsdevel, linux-block, linux-mm, netdev,
linux-kselftest, kunit-dev, linux-kernel, Christian Brauner,
David Hildenbrand, John Hubbard
Consolidate the test vector struct in the kunit tests so that the bvec
pattern check helpers can share with the kvec check helpers.
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Christoph Hellwig <hch@lst.de>
cc: Christian Brauner <brauner@kernel.org>
cc: Jens Axboe <axboe@kernel.dk>
cc: Al Viro <viro@zeniv.linux.org.uk>
cc: David Hildenbrand <david@redhat.com>
cc: John Hubbard <jhubbard@nvidia.com>
cc: Brendan Higgins <brendanhiggins@google.com>
cc: David Gow <davidgow@google.com>
cc: linux-kselftest@vger.kernel.org
cc: kunit-dev@googlegroups.com
cc: linux-mm@kvack.org
cc: linux-fsdevel@vger.kernel.org
---
lib/kunit_iov_iter.c | 90 ++++++++++++++++++++++++--------------------
1 file changed, 50 insertions(+), 40 deletions(-)
diff --git a/lib/kunit_iov_iter.c b/lib/kunit_iov_iter.c
index ee586eb652b4..4925ca37cde6 100644
--- a/lib/kunit_iov_iter.c
+++ b/lib/kunit_iov_iter.c
@@ -18,22 +18,46 @@ MODULE_DESCRIPTION("iov_iter testing");
MODULE_AUTHOR("David Howells <dhowells@redhat.com>");
MODULE_LICENSE("GPL");
-struct kvec_test_range {
+struct iov_kunit_range {
int page, from, to;
};
-static const struct kvec_test_range kvec_test_ranges[] = {
- { 0, 0x00002, 0x00002 },
- { 0, 0x00027, 0x03000 },
- { 0, 0x05193, 0x18794 },
- { 0, 0x20000, 0x20000 },
- { 0, 0x20000, 0x24000 },
- { 0, 0x24000, 0x27001 },
- { 0, 0x29000, 0xffffb },
- { 0, 0xffffd, 0xffffe },
+/*
+ * Ranges that to use in tests where we have address/offset ranges to play
+ * with (ie. KVEC) or where we have a single blob that we can copy
+ * arbitrary chunks of (ie. XARRAY).
+ */
+static const struct iov_kunit_range kvec_test_ranges[] = {
+ { 0, 0x00002, 0x00002 }, /* Start with an empty range */
+ { 0, 0x00027, 0x03000 }, /* Midpage to page end */
+ { 0, 0x05193, 0x18794 }, /* Midpage to midpage */
+ { 0, 0x20000, 0x20000 }, /* Empty range in the middle */
+ { 0, 0x20000, 0x24000 }, /* Page start to page end */
+ { 0, 0x24000, 0x27001 }, /* Page end to midpage */
+ { 0, 0x29000, 0xffffb }, /* Page start to midpage */
+ { 0, 0xffffd, 0xffffe }, /* Almost contig to last, ending in same page */
{ -1 }
};
+/*
+ * Ranges that to use in tests where we have a list of partial pages to
+ * play with (ie. BVEC).
+ */
+static const struct iov_kunit_range bvec_test_ranges[] = {
+ { 0, 0x0002, 0x0002 }, /* Start with an empty range */
+ { 1, 0x0027, 0x0893 }, /* Random part of page */
+ { 2, 0x0193, 0x0794 }, /* Random part of page */
+ { 3, 0x0000, 0x1000 }, /* Full page */
+ { 4, 0x0000, 0x1000 }, /* Full page logically contig to last */
+ { 5, 0x0000, 0x1000 }, /* Full page logically contig to last */
+ { 6, 0x0000, 0x0ffb }, /* Part page logically contig to last */
+ { 6, 0x0ffd, 0x0ffe }, /* Part of prev page, but not quite contig */
+ { -1 }
+};
+
+/*
+ * The pattern to fill with.
+ */
static inline u8 pattern(unsigned long x)
{
return x & 0xff;
@@ -44,6 +68,9 @@ static void iov_kunit_unmap(void *data)
vunmap(data);
}
+/*
+ * Create a buffer out of some pages and return a vmap'd pointer to it.
+ */
static void *__init iov_kunit_create_buffer(struct kunit *test,
struct page ***ppages,
size_t npages)
@@ -75,7 +102,7 @@ static void *__init iov_kunit_create_buffer(struct kunit *test,
*/
static void iov_kunit_build_to_reference_pattern(struct kunit *test, u8 *scratch,
size_t bufsize,
- const struct kvec_test_range *pr)
+ const struct iov_kunit_range *pr)
{
int i, patt = 0;
@@ -91,7 +118,7 @@ static void iov_kunit_build_to_reference_pattern(struct kunit *test, u8 *scratch
*/
static void iov_kunit_build_from_reference_pattern(struct kunit *test, u8 *buffer,
size_t bufsize,
- const struct kvec_test_range *pr)
+ const struct iov_kunit_range *pr)
{
size_t i = 0, j;
@@ -124,7 +151,7 @@ static void __init iov_kunit_load_kvec(struct kunit *test,
struct iov_iter *iter, int dir,
struct kvec *kvec, unsigned int kvmax,
void *buffer, size_t bufsize,
- const struct kvec_test_range *pr)
+ const struct iov_kunit_range *pr)
{
size_t size = 0;
int i;
@@ -217,28 +244,12 @@ static void __init iov_kunit_copy_from_kvec(struct kunit *test)
KUNIT_SUCCEED();
}
-struct bvec_test_range {
- int page, from, to;
-};
-
-static const struct bvec_test_range bvec_test_ranges[] = {
- { 0, 0x0002, 0x0002 },
- { 1, 0x0027, 0x0893 },
- { 2, 0x0193, 0x0794 },
- { 3, 0x0000, 0x1000 },
- { 4, 0x0000, 0x1000 },
- { 5, 0x0000, 0x1000 },
- { 6, 0x0000, 0x0ffb },
- { 6, 0x0ffd, 0x0ffe },
- { -1 }
-};
-
static void __init iov_kunit_load_bvec(struct kunit *test,
struct iov_iter *iter, int dir,
struct bio_vec *bvec, unsigned int bvmax,
struct page **pages, size_t npages,
size_t bufsize,
- const struct bvec_test_range *pr)
+ const struct iov_kunit_range *pr)
{
struct page *can_merge = NULL, *page;
size_t size = 0;
@@ -276,13 +287,13 @@ static void __init iov_kunit_load_bvec(struct kunit *test,
*/
static void __init iov_kunit_copy_to_bvec(struct kunit *test)
{
- const struct bvec_test_range *pr;
+ const struct iov_kunit_range *pr;
struct iov_iter iter;
struct bio_vec bvec[8];
struct page **spages, **bpages;
u8 *scratch, *buffer;
size_t bufsize, npages, size, copied;
- int i, b, patt;
+ int i, patt;
bufsize = 0x100000;
npages = bufsize / PAGE_SIZE;
@@ -305,10 +316,9 @@ static void __init iov_kunit_copy_to_bvec(struct kunit *test)
KUNIT_EXPECT_EQ(test, iter.nr_segs, 0);
/* Build the expected image in the scratch buffer. */
- b = 0;
patt = 0;
memset(scratch, 0, bufsize);
- for (pr = bvec_test_ranges; pr->page >= 0; pr++, b++) {
+ for (pr = bvec_test_ranges; pr->page >= 0; pr++) {
u8 *p = scratch + pr->page * PAGE_SIZE;
for (i = pr->from; i < pr->to; i++)
@@ -324,7 +334,7 @@ static void __init iov_kunit_copy_to_bvec(struct kunit *test)
*/
static void __init iov_kunit_copy_from_bvec(struct kunit *test)
{
- const struct bvec_test_range *pr;
+ const struct iov_kunit_range *pr;
struct iov_iter iter;
struct bio_vec bvec[8];
struct page **spages, **bpages;
@@ -411,7 +421,7 @@ static struct xarray *iov_kunit_create_xarray(struct kunit *test)
*/
static void __init iov_kunit_copy_to_xarray(struct kunit *test)
{
- const struct kvec_test_range *pr;
+ const struct iov_kunit_range *pr;
struct iov_iter iter;
struct xarray *xarray;
struct page **spages, **bpages;
@@ -457,7 +467,7 @@ static void __init iov_kunit_copy_to_xarray(struct kunit *test)
*/
static void __init iov_kunit_copy_from_xarray(struct kunit *test)
{
- const struct kvec_test_range *pr;
+ const struct iov_kunit_range *pr;
struct iov_iter iter;
struct xarray *xarray;
struct page **spages, **bpages;
@@ -503,7 +513,7 @@ static void __init iov_kunit_copy_from_xarray(struct kunit *test)
*/
static void __init iov_kunit_extract_pages_kvec(struct kunit *test)
{
- const struct kvec_test_range *pr;
+ const struct iov_kunit_range *pr;
struct iov_iter iter;
struct page **bpages, *pagelist[8], **pages = pagelist;
struct kvec kvec[8];
@@ -583,7 +593,7 @@ static void __init iov_kunit_extract_pages_kvec(struct kunit *test)
*/
static void __init iov_kunit_extract_pages_bvec(struct kunit *test)
{
- const struct bvec_test_range *pr;
+ const struct iov_kunit_range *pr;
struct iov_iter iter;
struct page **bpages, *pagelist[8], **pages = pagelist;
struct bio_vec bvec[8];
@@ -661,7 +671,7 @@ static void __init iov_kunit_extract_pages_bvec(struct kunit *test)
*/
static void __init iov_kunit_extract_pages_xarray(struct kunit *test)
{
- const struct kvec_test_range *pr;
+ const struct iov_kunit_range *pr;
struct iov_iter iter;
struct xarray *xarray;
struct page **bpages, *pagelist[8], **pages = pagelist;
^ permalink raw reply related [flat|nested] 15+ messages in thread* [PATCH v3 04/10] iov_iter: Consolidate bvec pattern checking
2023-09-22 11:30 [PATCH v3 00/10] iov_iter: kunit: Cleanup, abstraction and more tests David Howells
` (2 preceding siblings ...)
2023-09-22 11:30 ` [PATCH v3 03/10] iov_iter: Consolidate the test vector struct in the kunit tests David Howells
@ 2023-09-22 11:30 ` David Howells
2023-09-22 11:30 ` [PATCH v3 05/10] iov_iter: Create a function to prepare userspace VM for UBUF/IOVEC tests David Howells
` (5 subsequent siblings)
9 siblings, 0 replies; 15+ messages in thread
From: David Howells @ 2023-09-22 11:30 UTC (permalink / raw)
To: Jens Axboe
Cc: David Howells, Al Viro, Linus Torvalds, Christoph Hellwig,
Christian Brauner, David Laight, Matthew Wilcox, Brendan Higgins,
David Gow, linux-fsdevel, linux-block, linux-mm, netdev,
linux-kselftest, kunit-dev, linux-kernel, Christian Brauner,
David Hildenbrand, John Hubbard
Make the BVEC-testing functions use the consolidated pattern checking
functions to reduce the amount of duplicated code.
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Christoph Hellwig <hch@lst.de>
cc: Christian Brauner <brauner@kernel.org>
cc: Jens Axboe <axboe@kernel.dk>
cc: Al Viro <viro@zeniv.linux.org.uk>
cc: David Hildenbrand <david@redhat.com>
cc: John Hubbard <jhubbard@nvidia.com>
cc: Brendan Higgins <brendanhiggins@google.com>
cc: David Gow <davidgow@google.com>
cc: linux-kselftest@vger.kernel.org
cc: kunit-dev@googlegroups.com
cc: linux-mm@kvack.org
cc: linux-fsdevel@vger.kernel.org
---
lib/kunit_iov_iter.c | 42 +++++++++++-------------------------------
1 file changed, 11 insertions(+), 31 deletions(-)
diff --git a/lib/kunit_iov_iter.c b/lib/kunit_iov_iter.c
index 4925ca37cde6..eb86371b67d0 100644
--- a/lib/kunit_iov_iter.c
+++ b/lib/kunit_iov_iter.c
@@ -107,9 +107,11 @@ static void iov_kunit_build_to_reference_pattern(struct kunit *test, u8 *scratch
int i, patt = 0;
memset(scratch, 0, bufsize);
- for (; pr->page >= 0; pr++)
+ for (; pr->page >= 0; pr++) {
+ u8 *p = scratch + pr->page * PAGE_SIZE;
for (i = pr->from; i < pr->to; i++)
- scratch[i] = pattern(patt++);
+ p[i] = pattern(patt++);
+ }
}
/*
@@ -124,8 +126,10 @@ static void iov_kunit_build_from_reference_pattern(struct kunit *test, u8 *buffe
memset(buffer, 0, bufsize);
for (; pr->page >= 0; pr++) {
+ size_t patt = pr->page * PAGE_SIZE;
+
for (j = pr->from; j < pr->to; j++) {
- buffer[i++] = pattern(j);
+ buffer[i++] = pattern(patt + j);
if (i >= bufsize)
return;
}
@@ -287,13 +291,12 @@ static void __init iov_kunit_load_bvec(struct kunit *test,
*/
static void __init iov_kunit_copy_to_bvec(struct kunit *test)
{
- const struct iov_kunit_range *pr;
struct iov_iter iter;
struct bio_vec bvec[8];
struct page **spages, **bpages;
u8 *scratch, *buffer;
size_t bufsize, npages, size, copied;
- int i, patt;
+ int i;
bufsize = 0x100000;
npages = bufsize / PAGE_SIZE;
@@ -315,16 +318,7 @@ static void __init iov_kunit_copy_to_bvec(struct kunit *test)
KUNIT_EXPECT_EQ(test, iter.count, 0);
KUNIT_EXPECT_EQ(test, iter.nr_segs, 0);
- /* Build the expected image in the scratch buffer. */
- patt = 0;
- memset(scratch, 0, bufsize);
- for (pr = bvec_test_ranges; pr->page >= 0; pr++) {
- u8 *p = scratch + pr->page * PAGE_SIZE;
-
- for (i = pr->from; i < pr->to; i++)
- p[i] = pattern(patt++);
- }
-
+ iov_kunit_build_to_reference_pattern(test, scratch, bufsize, bvec_test_ranges);
iov_kunit_check_pattern(test, buffer, scratch, bufsize);
KUNIT_SUCCEED();
}
@@ -334,13 +328,12 @@ static void __init iov_kunit_copy_to_bvec(struct kunit *test)
*/
static void __init iov_kunit_copy_from_bvec(struct kunit *test)
{
- const struct iov_kunit_range *pr;
struct iov_iter iter;
struct bio_vec bvec[8];
struct page **spages, **bpages;
u8 *scratch, *buffer;
size_t bufsize, npages, size, copied;
- int i, j;
+ int i;
bufsize = 0x100000;
npages = bufsize / PAGE_SIZE;
@@ -362,20 +355,7 @@ static void __init iov_kunit_copy_from_bvec(struct kunit *test)
KUNIT_EXPECT_EQ(test, iter.count, 0);
KUNIT_EXPECT_EQ(test, iter.nr_segs, 0);
- /* Build the expected image in the main buffer. */
- i = 0;
- memset(buffer, 0, bufsize);
- for (pr = bvec_test_ranges; pr->page >= 0; pr++) {
- size_t patt = pr->page * PAGE_SIZE;
-
- for (j = pr->from; j < pr->to; j++) {
- buffer[i++] = pattern(patt + j);
- if (i >= bufsize)
- goto stop;
- }
- }
-stop:
-
+ iov_kunit_build_from_reference_pattern(test, buffer, bufsize, bvec_test_ranges);
iov_kunit_check_pattern(test, buffer, scratch, bufsize);
KUNIT_SUCCEED();
}
^ permalink raw reply related [flat|nested] 15+ messages in thread* [PATCH v3 05/10] iov_iter: Create a function to prepare userspace VM for UBUF/IOVEC tests
2023-09-22 11:30 [PATCH v3 00/10] iov_iter: kunit: Cleanup, abstraction and more tests David Howells
` (3 preceding siblings ...)
2023-09-22 11:30 ` [PATCH v3 04/10] iov_iter: Consolidate bvec pattern checking David Howells
@ 2023-09-22 11:30 ` David Howells
2023-09-22 11:30 ` [PATCH v3 06/10] iov_iter: Add copy kunit tests for ITER_UBUF and ITER_IOVEC David Howells
` (4 subsequent siblings)
9 siblings, 0 replies; 15+ messages in thread
From: David Howells @ 2023-09-22 11:30 UTC (permalink / raw)
To: Jens Axboe
Cc: David Howells, Al Viro, Linus Torvalds, Christoph Hellwig,
Christian Brauner, David Laight, Matthew Wilcox, Brendan Higgins,
David Gow, linux-fsdevel, linux-block, linux-mm, netdev,
linux-kselftest, kunit-dev, linux-kernel, Andrew Morton,
Christian Brauner, David Hildenbrand, John Hubbard, Huacai Chen,
WANG Xuerui, Heiko Carstens, Vasily Gorbik, Alexander Gordeev,
Christian Borntraeger, Sven Schnelle, loongarch, linux-s390
Create a function to set up a userspace VM for the kunit testing thread and
set up a buffer within it such that ITER_UBUF and ITER_IOVEC tests can be
performed.
Note that this requires current->mm to point to a sufficiently set up
mm_struct. This is done by partially mirroring what execve does.
The following steps are performed:
(1) Allocate an mm_struct and pick an arch layout (required to set
mm->get_unmapped_area).
(2) Create an empty "stack" VMA so that the VMA maple tree is set up and
won't cause a crash in the maple tree code later. We don't actually
care about the stack as we're not going to actually execute userspace.
(3) Create an anon file and attach a bunch of folios to it so that the
requested number of pages are accessible.
(4) Make the kthread use the mm. This must be done before mmap is called.
(5) Shared-mmap the anon file into the allocated mm_struct.
This requires access to otherwise unexported core symbols: mm_alloc(),
vm_area_alloc(), insert_vm_struct() arch_pick_mmap_layout() and
anon_inode_getfile_secure(), which I've exported _GPL.
[?] Would it be better if this were done in core and not in a module?
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Andrew Morton <akpm@linux-foundation.org>
cc: Christoph Hellwig <hch@lst.de>
cc: Christian Brauner <brauner@kernel.org>
cc: Jens Axboe <axboe@kernel.dk>
cc: Al Viro <viro@zeniv.linux.org.uk>
cc: Matthew Wilcox <willy@infradead.org>
cc: David Hildenbrand <david@redhat.com>
cc: John Hubbard <jhubbard@nvidia.com>
cc: Brendan Higgins <brendanhiggins@google.com>
cc: David Gow <davidgow@google.com>
cc: Huacai Chen <chenhuacai@kernel.org>
cc: WANG Xuerui <kernel@xen0n.name>
cc: Heiko Carstens <hca@linux.ibm.com>
cc: Vasily Gorbik <gor@linux.ibm.com>
cc: Alexander Gordeev <agordeev@linux.ibm.com>
cc: Christian Borntraeger <borntraeger@linux.ibm.com>
cc: Sven Schnelle <svens@linux.ibm.com>
cc: linux-mm@kvack.org
cc: loongarch@lists.linux.dev
cc: linux-s390@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
cc: linux-kselftest@vger.kernel.org
cc: kunit-dev@googlegroups.com
---
arch/s390/kernel/vdso.c | 1 +
fs/anon_inodes.c | 1 +
kernel/fork.c | 2 +
lib/kunit_iov_iter.c | 143 ++++++++++++++++++++++++++++++++++++++++
mm/mmap.c | 1 +
mm/util.c | 3 +
6 files changed, 151 insertions(+)
diff --git a/arch/s390/kernel/vdso.c b/arch/s390/kernel/vdso.c
index bbaefd84f15e..6849eac59129 100644
--- a/arch/s390/kernel/vdso.c
+++ b/arch/s390/kernel/vdso.c
@@ -223,6 +223,7 @@ unsigned long vdso_size(void)
size += vdso64_end - vdso64_start;
return PAGE_ALIGN(size);
}
+EXPORT_SYMBOL_GPL(vdso_size);
int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
{
diff --git a/fs/anon_inodes.c b/fs/anon_inodes.c
index 24192a7667ed..4190336180ee 100644
--- a/fs/anon_inodes.c
+++ b/fs/anon_inodes.c
@@ -176,6 +176,7 @@ struct file *anon_inode_getfile_secure(const char *name,
return __anon_inode_getfile(name, fops, priv, flags,
context_inode, true);
}
+EXPORT_SYMBOL_GPL(anon_inode_getfile_secure);
static int __anon_inode_getfd(const char *name,
const struct file_operations *fops,
diff --git a/kernel/fork.c b/kernel/fork.c
index 3b6d20dfb9a8..9ab604574400 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -494,6 +494,7 @@ struct vm_area_struct *vm_area_alloc(struct mm_struct *mm)
return vma;
}
+EXPORT_SYMBOL_GPL(vm_area_alloc);
struct vm_area_struct *vm_area_dup(struct vm_area_struct *orig)
{
@@ -1337,6 +1338,7 @@ struct mm_struct *mm_alloc(void)
memset(mm, 0, sizeof(*mm));
return mm_init(mm, current, current_user_ns());
}
+EXPORT_SYMBOL_GPL(mm_alloc);
static inline void __mmput(struct mm_struct *mm)
{
diff --git a/lib/kunit_iov_iter.c b/lib/kunit_iov_iter.c
index eb86371b67d0..63e4dd1e7c1b 100644
--- a/lib/kunit_iov_iter.c
+++ b/lib/kunit_iov_iter.c
@@ -10,6 +10,13 @@
#include <linux/module.h>
#include <linux/vmalloc.h>
#include <linux/mm.h>
+#include <linux/pagemap.h>
+#include <linux/mman.h>
+#include <linux/file.h>
+#include <linux/kthread.h>
+#include <linux/anon_inodes.h>
+#include <linux/writeback.h>
+#include <linux/personality.h>
#include <linux/uio.h>
#include <linux/bvec.h>
#include <kunit/test.h>
@@ -68,6 +75,20 @@ static void iov_kunit_unmap(void *data)
vunmap(data);
}
+static void iov_kunit_mmdrop(void *data)
+{
+ struct mm_struct *mm = data;
+
+ if (current->mm == mm)
+ kthread_unuse_mm(mm);
+ mmdrop(mm);
+}
+
+static void iov_kunit_fput(void *data)
+{
+ fput(data);
+}
+
/*
* Create a buffer out of some pages and return a vmap'd pointer to it.
*/
@@ -151,6 +172,128 @@ static void iov_kunit_check_pattern(struct kunit *test, const u8 *buffer,
}
}
+static const struct file_operations iov_kunit_user_file_fops = {
+ .mmap = generic_file_mmap,
+};
+
+static int iov_kunit_user_file_read_folio(struct file *file, struct folio *folio)
+{
+ folio_mark_uptodate(folio);
+ folio_unlock(folio);
+ return 0;
+}
+
+static const struct address_space_operations iov_kunit_user_file_aops = {
+ .read_folio = iov_kunit_user_file_read_folio,
+ .dirty_folio = filemap_dirty_folio,
+};
+
+/*
+ * Create an anonymous file and attach a bunch of pages to it. We can then use
+ * this in mmap() and check the pages against it when doing extraction tests.
+ */
+static struct file *iov_kunit_create_file(struct kunit *test, size_t npages,
+ struct page ***ppages)
+{
+ struct folio *folio;
+ struct file *file;
+ struct page **pages = NULL;
+ size_t i;
+
+ if (ppages) {
+ pages = kunit_kcalloc(test, npages, sizeof(struct page *), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pages);
+ *ppages = pages;
+ }
+
+ file = anon_inode_getfile_secure("kunit-iov-test",
+ &iov_kunit_user_file_fops,
+ NULL, O_RDWR, NULL);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, file);
+ kunit_add_action_or_reset(test, iov_kunit_fput, file);
+ file->f_mapping->a_ops = &iov_kunit_user_file_aops;
+
+ i_size_write(file_inode(file), npages * PAGE_SIZE);
+ for (i = 0; i < npages; i++) {
+ folio = filemap_grab_folio(file->f_mapping, i);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, folio);
+ if (pages)
+ *pages++ = folio_page(folio, 0);
+ folio_unlock(folio);
+ folio_put(folio);
+ }
+
+ return file;
+}
+
+/*
+ * Attach a userspace buffer to a kernel thread by adding an mm_struct to it
+ * and mmapping the buffer. If the caller requires a list of pages for
+ * checking, then an anon_inode file is created, populated with pages and
+ * mmapped otherwise an anonymous mapping is used.
+ */
+static u8 __user *__init iov_kunit_create_user_buf(struct kunit *test,
+ size_t npages,
+ struct page ***ppages)
+{
+ struct rlimit rlim_stack = {
+ .rlim_cur = LONG_MAX,
+ .rlim_max = LONG_MAX,
+ };
+ struct vm_area_struct *vma;
+ struct mm_struct *mm;
+ struct file *file;
+ u8 __user *buffer;
+ int ret;
+
+ KUNIT_ASSERT_NULL(test, current->mm);
+
+ mm = mm_alloc();
+ KUNIT_ASSERT_NOT_NULL(test, mm);
+ kunit_add_action_or_reset(test, iov_kunit_mmdrop, mm);
+ arch_pick_mmap_layout(mm, &rlim_stack);
+
+ vma = vm_area_alloc(mm);
+ KUNIT_ASSERT_NOT_NULL(test, vma);
+ vma_set_anonymous(vma);
+
+ /*
+ * Place the stack at the largest stack address the architecture
+ * supports. Later, we'll move this to an appropriate place. We don't
+ * use STACK_TOP because that can depend on attributes which aren't
+ * configured yet.
+ */
+ vma->vm_end = STACK_TOP_MAX;
+ vma->vm_start = vma->vm_end - PAGE_SIZE;
+ vm_flags_init(vma, VM_SOFTDIRTY | VM_STACK_FLAGS | VM_STACK_INCOMPLETE_SETUP);
+ vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
+
+ ret = insert_vm_struct(mm, vma);
+ KUNIT_ASSERT_EQ(test, ret, 0);
+
+ mm->stack_vm = mm->total_vm = 1;
+
+ /*
+ * If we want the pages, attach the pages to a file to prevent swap
+ * interfering, otherwise use an anonymous mapping.
+ */
+ if (ppages) {
+ file = iov_kunit_create_file(test, npages, ppages);
+
+ kthread_use_mm(mm);
+ buffer = (u8 __user *)vm_mmap(file, 0, PAGE_SIZE * npages,
+ PROT_READ | PROT_WRITE,
+ MAP_SHARED, 0);
+ } else {
+ kthread_use_mm(mm);
+ buffer = (u8 __user *)vm_mmap(NULL, 0, PAGE_SIZE * npages,
+ PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | MAP_ANONYMOUS, 0);
+ }
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, (void __force *)buffer);
+ return buffer;
+}
+
static void __init iov_kunit_load_kvec(struct kunit *test,
struct iov_iter *iter, int dir,
struct kvec *kvec, unsigned int kvmax,
diff --git a/mm/mmap.c b/mm/mmap.c
index b56a7f0c9f85..2ea4a98a2cab 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -3284,6 +3284,7 @@ int insert_vm_struct(struct mm_struct *mm, struct vm_area_struct *vma)
return 0;
}
+EXPORT_SYMBOL_GPL(insert_vm_struct);
/*
* Copy the vma structure to a new location in the same mm,
diff --git a/mm/util.c b/mm/util.c
index 8cbbfd3a3d59..09895358f067 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -455,6 +455,9 @@ void arch_pick_mmap_layout(struct mm_struct *mm, struct rlimit *rlim_stack)
mm->get_unmapped_area = arch_get_unmapped_area;
}
#endif
+#ifdef CONFIG_MMU
+EXPORT_SYMBOL_GPL(arch_pick_mmap_layout);
+#endif
/**
* __account_locked_vm - account locked pages to an mm's locked_vm
^ permalink raw reply related [flat|nested] 15+ messages in thread* [PATCH v3 06/10] iov_iter: Add copy kunit tests for ITER_UBUF and ITER_IOVEC
2023-09-22 11:30 [PATCH v3 00/10] iov_iter: kunit: Cleanup, abstraction and more tests David Howells
` (4 preceding siblings ...)
2023-09-22 11:30 ` [PATCH v3 05/10] iov_iter: Create a function to prepare userspace VM for UBUF/IOVEC tests David Howells
@ 2023-09-22 11:30 ` David Howells
2023-09-22 11:30 ` [PATCH v3 07/10] iov_iter: Add extract " David Howells
` (3 subsequent siblings)
9 siblings, 0 replies; 15+ messages in thread
From: David Howells @ 2023-09-22 11:30 UTC (permalink / raw)
To: Jens Axboe
Cc: David Howells, Al Viro, Linus Torvalds, Christoph Hellwig,
Christian Brauner, David Laight, Matthew Wilcox, Brendan Higgins,
David Gow, linux-fsdevel, linux-block, linux-mm, netdev,
linux-kselftest, kunit-dev, linux-kernel, Andrew Morton,
Christian Brauner, David Hildenbrand, John Hubbard
Add copy kunit tests for ITER_UBUF- and ITER_IOVEC-type iterators. This
attaches a userspace VM with a mapped file in it temporarily to the test
thread.
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Andrew Morton <akpm@linux-foundation.org>
cc: Christoph Hellwig <hch@lst.de>
cc: Christian Brauner <brauner@kernel.org>
cc: Jens Axboe <axboe@kernel.dk>
cc: Al Viro <viro@zeniv.linux.org.uk>
cc: Matthew Wilcox <willy@infradead.org>
cc: David Hildenbrand <david@redhat.com>
cc: John Hubbard <jhubbard@nvidia.com>
cc: Brendan Higgins <brendanhiggins@google.com>
cc: David Gow <davidgow@google.com>
cc: linux-mm@kvack.org
cc: linux-fsdevel@vger.kernel.org
cc: linux-kselftest@vger.kernel.org
cc: kunit-dev@googlegroups.com
---
lib/kunit_iov_iter.c | 236 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 236 insertions(+)
diff --git a/lib/kunit_iov_iter.c b/lib/kunit_iov_iter.c
index 63e4dd1e7c1b..34f0d82674ee 100644
--- a/lib/kunit_iov_iter.c
+++ b/lib/kunit_iov_iter.c
@@ -117,6 +117,23 @@ static void *__init iov_kunit_create_buffer(struct kunit *test,
return buffer;
}
+/*
+ * Fill a user buffer with a recognisable pattern.
+ */
+static void iov_kunit_fill_user_buf(struct kunit *test,
+ u8 __user *buffer, size_t bufsize)
+{
+ size_t i;
+ int err;
+
+ for (i = 0; i < bufsize; i++) {
+ err = put_user(pattern(i), &buffer[i]);
+ KUNIT_EXPECT_EQ(test, err, 0);
+ if (test->status == KUNIT_FAILURE)
+ return;
+ }
+}
+
/*
* Build the reference pattern in the scratch buffer that we expect to see in
* the iterator buffer (ie. the result of copy *to*).
@@ -172,6 +189,25 @@ static void iov_kunit_check_pattern(struct kunit *test, const u8 *buffer,
}
}
+/*
+ * Compare a user and a scratch buffer to see that they're the same.
+ */
+static void iov_kunit_check_user_pattern(struct kunit *test, const u8 __user *buffer,
+ const u8 *scratch, size_t bufsize)
+{
+ size_t i;
+ int err;
+ u8 c;
+
+ for (i = 0; i < bufsize; i++) {
+ err = get_user(c, &buffer[i]);
+ KUNIT_EXPECT_EQ(test, err, 0);
+ KUNIT_EXPECT_EQ_MSG(test, c, scratch[i], "at i=%x", i);
+ if (c != scratch[i])
+ return;
+ }
+}
+
static const struct file_operations iov_kunit_user_file_fops = {
.mmap = generic_file_mmap,
};
@@ -294,6 +330,202 @@ static u8 __user *__init iov_kunit_create_user_buf(struct kunit *test,
return buffer;
}
+/*
+ * Test copying to an ITER_UBUF-type iterator.
+ */
+static void __init iov_kunit_copy_to_ubuf(struct kunit *test)
+{
+ const struct iov_kunit_range *pr;
+ struct iov_iter iter;
+ struct page **spages;
+ u8 __user *buffer;
+ u8 *scratch;
+ ssize_t uncleared;
+ size_t bufsize, npages, size, copied;
+ int i;
+
+ bufsize = 0x100000;
+ npages = bufsize / PAGE_SIZE;
+
+ scratch = iov_kunit_create_buffer(test, &spages, npages);
+ for (i = 0; i < bufsize; i++)
+ scratch[i] = pattern(i);
+
+ buffer = iov_kunit_create_user_buf(test, npages, NULL);
+ uncleared = clear_user(buffer, bufsize);
+ KUNIT_EXPECT_EQ(test, uncleared, 0);
+ if (uncleared)
+ return;
+
+ i = 0;
+ for (pr = kvec_test_ranges; pr->page >= 0; pr++) {
+ size = pr->to - pr->from;
+ KUNIT_ASSERT_LE(test, pr->to, bufsize);
+
+ iov_iter_ubuf(&iter, ITER_DEST, buffer + pr->from, size);
+ copied = copy_to_iter(scratch + i, size, &iter);
+
+ KUNIT_EXPECT_EQ(test, copied, size);
+ KUNIT_EXPECT_EQ(test, iter.count, 0);
+ KUNIT_EXPECT_EQ(test, iter.iov_offset, size);
+ if (test->status == KUNIT_FAILURE)
+ break;
+ i += size;
+ }
+
+ iov_kunit_build_to_reference_pattern(test, scratch, bufsize, kvec_test_ranges);
+ iov_kunit_check_user_pattern(test, buffer, scratch, bufsize);
+ KUNIT_SUCCEED();
+}
+
+/*
+ * Test copying from an ITER_UBUF-type iterator.
+ */
+static void __init iov_kunit_copy_from_ubuf(struct kunit *test)
+{
+ const struct iov_kunit_range *pr;
+ struct iov_iter iter;
+ struct page **spages;
+ u8 __user *buffer;
+ u8 *scratch, *reference;
+ size_t bufsize, npages, size, copied;
+ int i;
+
+ bufsize = 0x100000;
+ npages = bufsize / PAGE_SIZE;
+
+ buffer = iov_kunit_create_user_buf(test, npages, NULL);
+ iov_kunit_fill_user_buf(test, buffer, bufsize);
+
+ scratch = iov_kunit_create_buffer(test, &spages, npages);
+ memset(scratch, 0, bufsize);
+
+ reference = iov_kunit_create_buffer(test, &spages, npages);
+
+ i = 0;
+ for (pr = kvec_test_ranges; pr->page >= 0; pr++) {
+ size = pr->to - pr->from;
+ KUNIT_ASSERT_LE(test, pr->to, bufsize);
+
+ iov_iter_ubuf(&iter, ITER_SOURCE, buffer + pr->from, size);
+ copied = copy_from_iter(scratch + i, size, &iter);
+
+ KUNIT_EXPECT_EQ(test, copied, size);
+ KUNIT_EXPECT_EQ(test, iter.count, 0);
+ KUNIT_EXPECT_EQ(test, iter.iov_offset, size);
+ if (test->status == KUNIT_FAILURE)
+ break;
+ i += size;
+ }
+
+ iov_kunit_build_from_reference_pattern(test, reference, bufsize, kvec_test_ranges);
+ iov_kunit_check_pattern(test, scratch, reference, bufsize);
+ KUNIT_SUCCEED();
+}
+
+static void __init iov_kunit_load_iovec(struct kunit *test,
+ struct iov_iter *iter, int dir,
+ struct iovec *iov, unsigned int iovmax,
+ u8 __user *buffer, size_t bufsize,
+ const struct iov_kunit_range *pr)
+{
+ size_t size = 0;
+ int i;
+
+ for (i = 0; i < iovmax; i++, pr++) {
+ if (pr->page < 0)
+ break;
+ KUNIT_ASSERT_GE(test, pr->to, pr->from);
+ KUNIT_ASSERT_LE(test, pr->to, bufsize);
+ iov[i].iov_base = buffer + pr->from;
+ iov[i].iov_len = pr->to - pr->from;
+ size += pr->to - pr->from;
+ }
+ KUNIT_ASSERT_LE(test, size, bufsize);
+
+ iov_iter_init(iter, dir, iov, i, size);
+}
+
+/*
+ * Test copying to an ITER_IOVEC-type iterator.
+ */
+static void __init iov_kunit_copy_to_iovec(struct kunit *test)
+{
+ struct iov_iter iter;
+ struct page **spages;
+ struct iovec iov[8];
+ u8 __user *buffer;
+ u8 *scratch;
+ ssize_t uncleared;
+ size_t bufsize, npages, size, copied;
+ int i;
+
+ bufsize = 0x100000;
+ npages = bufsize / PAGE_SIZE;
+
+ scratch = iov_kunit_create_buffer(test, &spages, npages);
+ for (i = 0; i < bufsize; i++)
+ scratch[i] = pattern(i);
+
+ buffer = iov_kunit_create_user_buf(test, npages, NULL);
+ uncleared = clear_user(buffer, bufsize);
+ KUNIT_EXPECT_EQ(test, uncleared, 0);
+ if (uncleared)
+ return;
+
+ iov_kunit_load_iovec(test, &iter, ITER_DEST, iov, ARRAY_SIZE(iov),
+ buffer, bufsize, kvec_test_ranges);
+ size = iter.count;
+
+ copied = copy_to_iter(scratch, size, &iter);
+
+ KUNIT_EXPECT_EQ(test, copied, size);
+ KUNIT_EXPECT_EQ(test, iter.count, 0);
+ KUNIT_EXPECT_EQ(test, iter.nr_segs, 0);
+
+ iov_kunit_build_to_reference_pattern(test, scratch, bufsize, kvec_test_ranges);
+ iov_kunit_check_user_pattern(test, buffer, scratch, bufsize);
+ KUNIT_SUCCEED();
+}
+
+/*
+ * Test copying from an ITER_IOVEC-type iterator.
+ */
+static void __init iov_kunit_copy_from_iovec(struct kunit *test)
+{
+ struct iov_iter iter;
+ struct page **spages;
+ struct iovec iov[8];
+ u8 __user *buffer;
+ u8 *scratch, *reference;
+ size_t bufsize, npages, size, copied;
+
+ bufsize = 0x100000;
+ npages = bufsize / PAGE_SIZE;
+
+ buffer = iov_kunit_create_user_buf(test, npages, NULL);
+ iov_kunit_fill_user_buf(test, buffer, bufsize);
+
+ scratch = iov_kunit_create_buffer(test, &spages, npages);
+ memset(scratch, 0, bufsize);
+
+ reference = iov_kunit_create_buffer(test, &spages, npages);
+
+ iov_kunit_load_iovec(test, &iter, ITER_SOURCE, iov, ARRAY_SIZE(iov),
+ buffer, bufsize, kvec_test_ranges);
+ size = iter.count;
+
+ copied = copy_from_iter(scratch, size, &iter);
+
+ KUNIT_EXPECT_EQ(test, copied, size);
+ KUNIT_EXPECT_EQ(test, iter.count, 0);
+ KUNIT_EXPECT_EQ(test, iter.nr_segs, 0);
+
+ iov_kunit_build_from_reference_pattern(test, reference, bufsize, kvec_test_ranges);
+ iov_kunit_check_pattern(test, reference, scratch, bufsize);
+ KUNIT_SUCCEED();
+}
+
static void __init iov_kunit_load_kvec(struct kunit *test,
struct iov_iter *iter, int dir,
struct kvec *kvec, unsigned int kvmax,
@@ -869,6 +1101,10 @@ static void __init iov_kunit_extract_pages_xarray(struct kunit *test)
}
static struct kunit_case __refdata iov_kunit_cases[] = {
+ KUNIT_CASE(iov_kunit_copy_to_ubuf),
+ KUNIT_CASE(iov_kunit_copy_from_ubuf),
+ KUNIT_CASE(iov_kunit_copy_to_iovec),
+ KUNIT_CASE(iov_kunit_copy_from_iovec),
KUNIT_CASE(iov_kunit_copy_to_kvec),
KUNIT_CASE(iov_kunit_copy_from_kvec),
KUNIT_CASE(iov_kunit_copy_to_bvec),
^ permalink raw reply related [flat|nested] 15+ messages in thread* [PATCH v3 07/10] iov_iter: Add extract kunit tests for ITER_UBUF and ITER_IOVEC
2023-09-22 11:30 [PATCH v3 00/10] iov_iter: kunit: Cleanup, abstraction and more tests David Howells
` (5 preceding siblings ...)
2023-09-22 11:30 ` [PATCH v3 06/10] iov_iter: Add copy kunit tests for ITER_UBUF and ITER_IOVEC David Howells
@ 2023-09-22 11:30 ` David Howells
2023-09-22 11:30 ` [PATCH v3 08/10] iov_iter: Add benchmarking kunit tests David Howells
` (2 subsequent siblings)
9 siblings, 0 replies; 15+ messages in thread
From: David Howells @ 2023-09-22 11:30 UTC (permalink / raw)
To: Jens Axboe
Cc: David Howells, Al Viro, Linus Torvalds, Christoph Hellwig,
Christian Brauner, David Laight, Matthew Wilcox, Brendan Higgins,
David Gow, linux-fsdevel, linux-block, linux-mm, netdev,
linux-kselftest, kunit-dev, linux-kernel, Andrew Morton,
Christian Brauner, David Hildenbrand, John Hubbard
Add extraction kunit tests for ITER_UBUF- and ITER_IOVEC-type iterators.
This attaches a userspace VM with a mapped file in it temporarily to the
test thread.
[!] Note that this requires the kernel thread running the test to obtain
and deploy an mm_struct so that a user-side buffer can be created with mmap
- basically it has to emulated part of execve(). Doing so requires access
to additional core symbols: mm_alloc(), vm_area_alloc(), insert_vm_struct()
and arch_pick_mmap_layout(). See the iov_kunit_create_user_buf() function
added in the patch.
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Andrew Morton <akpm@linux-foundation.org>
cc: Christoph Hellwig <hch@lst.de>
cc: Christian Brauner <brauner@kernel.org>
cc: Jens Axboe <axboe@kernel.dk>
cc: Al Viro <viro@zeniv.linux.org.uk>
cc: Matthew Wilcox <willy@infradead.org>
cc: David Hildenbrand <david@redhat.com>
cc: John Hubbard <jhubbard@nvidia.com>
cc: Brendan Higgins <brendanhiggins@google.com>
cc: David Gow <davidgow@google.com>
cc: linux-mm@kvack.org
cc: linux-fsdevel@vger.kernel.org
cc: linux-kselftest@vger.kernel.org
cc: kunit-dev@googlegroups.com
---
lib/kunit_iov_iter.c | 164 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 164 insertions(+)
diff --git a/lib/kunit_iov_iter.c b/lib/kunit_iov_iter.c
index 34f0d82674ee..fdf598e49c0b 100644
--- a/lib/kunit_iov_iter.c
+++ b/lib/kunit_iov_iter.c
@@ -863,6 +863,168 @@ static void __init iov_kunit_copy_from_xarray(struct kunit *test)
KUNIT_SUCCEED();
}
+/*
+ * Test the extraction of ITER_UBUF-type iterators.
+ */
+static void __init iov_kunit_extract_pages_ubuf(struct kunit *test)
+{
+ const struct iov_kunit_range *pr;
+ struct iov_iter iter;
+ struct page **bpages, *pagelist[8], **pages = pagelist;
+ ssize_t len;
+ size_t bufsize, size = 0, npages;
+ int i, from;
+ u8 __user *buffer;
+
+ bufsize = 0x100000;
+ npages = bufsize / PAGE_SIZE;
+
+ buffer = iov_kunit_create_user_buf(test, npages, &bpages);
+
+ for (pr = kvec_test_ranges; pr->page >= 0; pr++) {
+ from = pr->from;
+ size = pr->to - from;
+ KUNIT_ASSERT_LE(test, pr->to, bufsize);
+
+ iov_iter_ubuf(&iter, ITER_SOURCE, buffer + pr->from, size);
+
+ do {
+ size_t offset0 = LONG_MAX;
+
+ for (i = 0; i < ARRAY_SIZE(pagelist); i++)
+ pagelist[i] = (void *)POISON_POINTER_DELTA + 0x5a;
+
+ len = iov_iter_extract_pages(&iter, &pages, 100 * 1024,
+ ARRAY_SIZE(pagelist), 0, &offset0);
+ KUNIT_EXPECT_GE(test, len, 0);
+ if (len < 0)
+ break;
+ KUNIT_EXPECT_LE(test, len, size);
+ KUNIT_EXPECT_EQ(test, iter.count, size - len);
+ if (len == 0)
+ break;
+ size -= len;
+ KUNIT_EXPECT_GE(test, (ssize_t)offset0, 0);
+ KUNIT_EXPECT_LT(test, offset0, PAGE_SIZE);
+
+ /* We're only checking the page pointers */
+ unpin_user_pages(pages, (offset0 + len) / PAGE_SIZE);
+
+ for (i = 0; i < ARRAY_SIZE(pagelist); i++) {
+ struct page *p;
+ ssize_t part = min_t(ssize_t, len, PAGE_SIZE - offset0);
+ int ix;
+
+ KUNIT_ASSERT_GE(test, part, 0);
+ ix = from / PAGE_SIZE;
+ KUNIT_ASSERT_LT(test, ix, npages);
+ p = bpages[ix];
+ KUNIT_EXPECT_PTR_EQ(test, pagelist[i], p);
+ KUNIT_EXPECT_EQ(test, offset0, from % PAGE_SIZE);
+ from += part;
+ len -= part;
+ KUNIT_ASSERT_GE(test, len, 0);
+ if (len == 0)
+ break;
+ offset0 = 0;
+ }
+
+ if (test->status == KUNIT_FAILURE)
+ goto stop;
+ } while (iov_iter_count(&iter) > 0);
+
+ KUNIT_EXPECT_EQ(test, size, 0);
+ KUNIT_EXPECT_EQ(test, iter.count, 0);
+ KUNIT_EXPECT_EQ(test, iter.iov_offset, pr->to - pr->from);
+ }
+
+stop:
+ KUNIT_SUCCEED();
+}
+
+/*
+ * Test the extraction of ITER_IOVEC-type iterators.
+ */
+static void __init iov_kunit_extract_pages_iovec(struct kunit *test)
+{
+ const struct iov_kunit_range *pr;
+ struct iov_iter iter;
+ struct iovec iov[8];
+ struct page **bpages, *pagelist[8], **pages = pagelist;
+ ssize_t len;
+ size_t bufsize, size = 0, npages;
+ int i, from;
+ u8 __user *buffer;
+
+ bufsize = 0x100000;
+ npages = bufsize / PAGE_SIZE;
+
+ buffer = iov_kunit_create_user_buf(test, npages, &bpages);
+
+ iov_kunit_load_iovec(test, &iter, ITER_SOURCE, iov, ARRAY_SIZE(iov),
+ buffer, bufsize, kvec_test_ranges);
+ size = iter.count;
+
+ pr = kvec_test_ranges;
+ from = pr->from;
+ do {
+ size_t offset0 = LONG_MAX;
+
+ for (i = 0; i < ARRAY_SIZE(pagelist); i++)
+ pagelist[i] = (void *)POISON_POINTER_DELTA + 0x5a;
+
+ len = iov_iter_extract_pages(&iter, &pages, 100 * 1024,
+ ARRAY_SIZE(pagelist), 0, &offset0);
+ KUNIT_EXPECT_GE(test, len, 0);
+ if (len < 0)
+ break;
+ KUNIT_EXPECT_LE(test, len, size);
+ KUNIT_EXPECT_EQ(test, iter.count, size - len);
+ if (len == 0)
+ break;
+ size -= len;
+ KUNIT_EXPECT_GE(test, (ssize_t)offset0, 0);
+ KUNIT_EXPECT_LT(test, offset0, PAGE_SIZE);
+
+ /* We're only checking the page pointers */
+ unpin_user_pages(pages, (offset0 + len) / PAGE_SIZE);
+
+ for (i = 0; i < ARRAY_SIZE(pagelist); i++) {
+ struct page *p;
+ ssize_t part = min_t(ssize_t, len, PAGE_SIZE - offset0);
+ int ix;
+
+ KUNIT_ASSERT_GE(test, part, 0);
+ while (from == pr->to) {
+ pr++;
+ from = pr->from;
+ if (pr->page < 0)
+ goto stop;
+ }
+
+ ix = from / PAGE_SIZE;
+ KUNIT_ASSERT_LT(test, ix, npages);
+ p = bpages[ix];
+ KUNIT_EXPECT_PTR_EQ(test, pagelist[i], p);
+ KUNIT_EXPECT_EQ(test, offset0, from % PAGE_SIZE);
+ from += part;
+ len -= part;
+ KUNIT_ASSERT_GE(test, len, 0);
+ if (len == 0)
+ break;
+ offset0 = 0;
+ }
+
+ if (test->status == KUNIT_FAILURE)
+ break;
+ } while (iov_iter_count(&iter) > 0);
+
+stop:
+ KUNIT_EXPECT_EQ(test, size, 0);
+ KUNIT_EXPECT_EQ(test, iter.count, 0);
+ KUNIT_SUCCEED();
+}
+
/*
* Test the extraction of ITER_KVEC-type iterators.
*/
@@ -1111,6 +1273,8 @@ static struct kunit_case __refdata iov_kunit_cases[] = {
KUNIT_CASE(iov_kunit_copy_from_bvec),
KUNIT_CASE(iov_kunit_copy_to_xarray),
KUNIT_CASE(iov_kunit_copy_from_xarray),
+ KUNIT_CASE(iov_kunit_extract_pages_ubuf),
+ KUNIT_CASE(iov_kunit_extract_pages_iovec),
KUNIT_CASE(iov_kunit_extract_pages_kvec),
KUNIT_CASE(iov_kunit_extract_pages_bvec),
KUNIT_CASE(iov_kunit_extract_pages_xarray),
^ permalink raw reply related [flat|nested] 15+ messages in thread* [PATCH v3 08/10] iov_iter: Add benchmarking kunit tests
2023-09-22 11:30 [PATCH v3 00/10] iov_iter: kunit: Cleanup, abstraction and more tests David Howells
` (6 preceding siblings ...)
2023-09-22 11:30 ` [PATCH v3 07/10] iov_iter: Add extract " David Howells
@ 2023-09-22 11:30 ` David Howells
2023-09-22 11:30 ` [PATCH v3 09/10] iov_iter: Add kunit to benchmark decanting of xarray to bvec David Howells
2023-09-22 11:30 ` [PATCH v3 10/10] iov_iter: Add benchmarking kunit tests for UBUF/IOVEC David Howells
9 siblings, 0 replies; 15+ messages in thread
From: David Howells @ 2023-09-22 11:30 UTC (permalink / raw)
To: Jens Axboe
Cc: David Howells, Al Viro, Linus Torvalds, Christoph Hellwig,
Christian Brauner, David Laight, Matthew Wilcox, Brendan Higgins,
David Gow, linux-fsdevel, linux-block, linux-mm, netdev,
linux-kselftest, kunit-dev, linux-kernel, Christian Brauner,
David Hildenbrand, John Hubbard
Add kunit tests to benchmark 256MiB copies to a KVEC iterator, a BVEC
iterator, an XARRAY iterator and to a loop that allocates 256-page BVECs
and fills them in (similar to a maximal bio struct being set up).
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Christoph Hellwig <hch@lst.de>
cc: Christian Brauner <brauner@kernel.org>
cc: Jens Axboe <axboe@kernel.dk>
cc: Al Viro <viro@zeniv.linux.org.uk>
cc: David Hildenbrand <david@redhat.com>
cc: John Hubbard <jhubbard@nvidia.com>
cc: Brendan Higgins <brendanhiggins@google.com>
cc: David Gow <davidgow@google.com>
cc: linux-kselftest@vger.kernel.org
cc: kunit-dev@googlegroups.com
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
---
lib/kunit_iov_iter.c | 251 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 251 insertions(+)
diff --git a/lib/kunit_iov_iter.c b/lib/kunit_iov_iter.c
index fdf598e49c0b..1a43e9518a63 100644
--- a/lib/kunit_iov_iter.c
+++ b/lib/kunit_iov_iter.c
@@ -1262,6 +1262,253 @@ static void __init iov_kunit_extract_pages_xarray(struct kunit *test)
KUNIT_SUCCEED();
}
+static void iov_kunit_free_page(void *data)
+{
+ __free_page(data);
+}
+
+#define IOV_KUNIT_NR_SAMPLES 16
+static void __init iov_kunit_benchmark_print_stats(struct kunit *test,
+ unsigned int *samples)
+{
+ unsigned long long sumsq = 0;
+ unsigned long total = 0, mean, stddev;
+ unsigned int n = IOV_KUNIT_NR_SAMPLES;
+ int i;
+
+ //for (i = 0; i < n; i++)
+ // kunit_info(test, "run %x: %u uS\n", i, samples[i]);
+
+ /* Ignore the 0th sample as that may include extra overhead such as
+ * setting up PTEs.
+ */
+ samples++;
+ n--;
+ for (i = 0; i < n; i++)
+ total += samples[i];
+ mean = total / n;
+
+ for (i = 0; i < n; i++) {
+ long s = samples[i] - mean;
+
+ sumsq += s * s;
+ }
+ stddev = int_sqrt64(sumsq);
+
+ kunit_info(test, "avg %lu uS, stddev %lu uS\n", mean, stddev);
+}
+
+/*
+ * Create a source buffer for benchmarking.
+ */
+static void *__init iov_kunit_create_source(struct kunit *test, size_t npages)
+{
+ struct page *page, **pages;
+ void *scratch;
+ size_t i;
+
+ /* Allocate a page and tile it repeatedly in the buffer. */
+ page = alloc_page(GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, page);
+ kunit_add_action_or_reset(test, iov_kunit_free_page, page);
+
+ pages = kunit_kmalloc_array(test, npages, sizeof(pages[0]), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, pages);
+ for (i = 0; i < npages; i++) {
+ pages[i] = page;
+ get_page(page);
+ }
+
+ scratch = vmap(pages, npages, VM_MAP | VM_MAP_PUT_PAGES, PAGE_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, scratch);
+ kunit_add_action_or_reset(test, iov_kunit_unmap, scratch);
+ return scratch;
+}
+
+/*
+ * Time copying 256MiB through an ITER_KVEC.
+ */
+static void __init iov_kunit_benchmark_kvec(struct kunit *test)
+{
+ struct iov_iter iter;
+ struct kvec kvec[8];
+ unsigned int samples[IOV_KUNIT_NR_SAMPLES];
+ ktime_t a, b;
+ ssize_t copied;
+ size_t size = 256 * 1024 * 1024, npages = size / PAGE_SIZE, part;
+ void *scratch, *buffer;
+ int i;
+
+ /* Allocate a huge buffer and populate it with pages. */
+ buffer = iov_kunit_create_source(test, npages);
+
+ /* Create a single large buffer to copy to/from. */
+ scratch = iov_kunit_create_source(test, npages);
+
+ /* Split the target over a number of kvecs */
+ copied = 0;
+ for (i = 0; i < ARRAY_SIZE(kvec); i++) {
+ part = size / ARRAY_SIZE(kvec);
+ kvec[i].iov_base = buffer + copied;
+ kvec[i].iov_len = part;
+ copied += part;
+ }
+ kvec[i - 1].iov_len += size - part;
+
+ /* Perform and time a bunch of copies. */
+ kunit_info(test, "Benchmarking copy_to_iter() over KVEC:\n");
+ for (i = 0; i < IOV_KUNIT_NR_SAMPLES; i++) {
+ iov_iter_kvec(&iter, ITER_SOURCE, kvec, ARRAY_SIZE(kvec), size);
+
+ a = ktime_get_real();
+ copied = copy_from_iter(scratch, size, &iter);
+ b = ktime_get_real();
+ KUNIT_EXPECT_EQ(test, copied, size);
+ samples[i] = ktime_to_us(ktime_sub(b, a));
+ }
+
+ iov_kunit_benchmark_print_stats(test, samples);
+ KUNIT_SUCCEED();
+}
+
+/*
+ * Time copying 256MiB through an ITER_BVEC.
+ */
+static void __init iov_kunit_benchmark_bvec(struct kunit *test)
+{
+ struct iov_iter iter;
+ struct bio_vec *bvec;
+ struct page *page;
+ unsigned int samples[IOV_KUNIT_NR_SAMPLES];
+ ktime_t a, b;
+ ssize_t copied;
+ size_t size = 256 * 1024 * 1024, npages = size / PAGE_SIZE;
+ void *scratch;
+ int i;
+
+ /* Allocate a page and tile it repeatedly in the buffer. */
+ page = alloc_page(GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, page);
+ kunit_add_action_or_reset(test, iov_kunit_free_page, page);
+
+ bvec = kunit_kmalloc_array(test, npages, sizeof(bvec[0]), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, bvec);
+ for (i = 0; i < npages; i++)
+ bvec_set_page(&bvec[i], page, PAGE_SIZE, 0);
+
+ /* Create a single large buffer to copy to/from. */
+ scratch = iov_kunit_create_source(test, npages);
+
+ /* Perform and time a bunch of copies. */
+ kunit_info(test, "Benchmarking copy_to_iter() over BVEC:\n");
+ for (i = 0; i < IOV_KUNIT_NR_SAMPLES; i++) {
+ iov_iter_bvec(&iter, ITER_SOURCE, bvec, npages, size);
+ a = ktime_get_real();
+ copied = copy_from_iter(scratch, size, &iter);
+ b = ktime_get_real();
+ KUNIT_EXPECT_EQ(test, copied, size);
+ samples[i] = ktime_to_us(ktime_sub(b, a));
+ }
+
+ iov_kunit_benchmark_print_stats(test, samples);
+ KUNIT_SUCCEED();
+}
+
+/*
+ * Time copying 256MiB through an ITER_BVEC in 256 page chunks.
+ */
+static void __init iov_kunit_benchmark_bvec_split(struct kunit *test)
+{
+ struct iov_iter iter;
+ struct bio_vec *bvec;
+ struct page *page;
+ unsigned int samples[IOV_KUNIT_NR_SAMPLES];
+ ktime_t a, b;
+ ssize_t copied;
+ size_t size, npages = 64;
+ void *scratch;
+ int i, j;
+
+ /* Allocate a page and tile it repeatedly in the buffer. */
+ page = alloc_page(GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, page);
+ kunit_add_action_or_reset(test, iov_kunit_free_page, page);
+
+ /* Create a single large buffer to copy to/from. */
+ scratch = iov_kunit_create_source(test, npages);
+
+ /* Perform and time a bunch of copies. */
+ kunit_info(test, "Benchmarking copy_to_iter() over BVEC:\n");
+ for (i = 0; i < IOV_KUNIT_NR_SAMPLES; i++) {
+ size = 256 * 1024 * 1024;
+ a = ktime_get_real();
+ do {
+ size_t part = min_t(size_t, size, npages * PAGE_SIZE);
+
+ bvec = kunit_kmalloc_array(test, npages, sizeof(bvec[0]), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, bvec);
+ for (j = 0; j < npages; j++)
+ bvec_set_page(&bvec[j], page, PAGE_SIZE, 0);
+
+ iov_iter_bvec(&iter, ITER_SOURCE, bvec, npages, part);
+ copied = copy_from_iter(scratch, part, &iter);
+ KUNIT_EXPECT_EQ(test, copied, part);
+ size -= part;
+ } while (size > 0);
+ b = ktime_get_real();
+ samples[i] = ktime_to_us(ktime_sub(b, a));
+ }
+
+ iov_kunit_benchmark_print_stats(test, samples);
+ KUNIT_SUCCEED();
+}
+
+/*
+ * Time copying 256MiB through an ITER_XARRAY.
+ */
+static void __init iov_kunit_benchmark_xarray(struct kunit *test)
+{
+ struct iov_iter iter;
+ struct xarray *xarray;
+ struct page *page;
+ unsigned int samples[IOV_KUNIT_NR_SAMPLES];
+ ktime_t a, b;
+ ssize_t copied;
+ size_t size = 256 * 1024 * 1024, npages = size / PAGE_SIZE;
+ void *scratch;
+ int i;
+
+ /* Allocate a page and tile it repeatedly in the buffer. */
+ page = alloc_page(GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, page);
+ kunit_add_action_or_reset(test, iov_kunit_free_page, page);
+
+ xarray = iov_kunit_create_xarray(test);
+
+ for (i = 0; i < npages; i++) {
+ void *x = xa_store(xarray, i, page, GFP_KERNEL);
+
+ KUNIT_ASSERT_FALSE(test, xa_is_err(x));
+ }
+
+ /* Create a single large buffer to copy to/from. */
+ scratch = iov_kunit_create_source(test, npages);
+
+ /* Perform and time a bunch of copies. */
+ kunit_info(test, "Benchmarking copy_to_iter() over XARRAY:\n");
+ for (i = 0; i < IOV_KUNIT_NR_SAMPLES; i++) {
+ iov_iter_xarray(&iter, ITER_SOURCE, xarray, 0, size);
+ a = ktime_get_real();
+ copied = copy_from_iter(scratch, size, &iter);
+ b = ktime_get_real();
+ KUNIT_EXPECT_EQ(test, copied, size);
+ samples[i] = ktime_to_us(ktime_sub(b, a));
+ }
+
+ iov_kunit_benchmark_print_stats(test, samples);
+ KUNIT_SUCCEED();
+}
+
static struct kunit_case __refdata iov_kunit_cases[] = {
KUNIT_CASE(iov_kunit_copy_to_ubuf),
KUNIT_CASE(iov_kunit_copy_from_ubuf),
@@ -1278,6 +1525,10 @@ static struct kunit_case __refdata iov_kunit_cases[] = {
KUNIT_CASE(iov_kunit_extract_pages_kvec),
KUNIT_CASE(iov_kunit_extract_pages_bvec),
KUNIT_CASE(iov_kunit_extract_pages_xarray),
+ KUNIT_CASE(iov_kunit_benchmark_kvec),
+ KUNIT_CASE(iov_kunit_benchmark_bvec),
+ KUNIT_CASE(iov_kunit_benchmark_bvec_split),
+ KUNIT_CASE(iov_kunit_benchmark_xarray),
{}
};
^ permalink raw reply related [flat|nested] 15+ messages in thread* [PATCH v3 09/10] iov_iter: Add kunit to benchmark decanting of xarray to bvec
2023-09-22 11:30 [PATCH v3 00/10] iov_iter: kunit: Cleanup, abstraction and more tests David Howells
` (7 preceding siblings ...)
2023-09-22 11:30 ` [PATCH v3 08/10] iov_iter: Add benchmarking kunit tests David Howells
@ 2023-09-22 11:30 ` David Howells
2023-09-22 11:30 ` [PATCH v3 10/10] iov_iter: Add benchmarking kunit tests for UBUF/IOVEC David Howells
9 siblings, 0 replies; 15+ messages in thread
From: David Howells @ 2023-09-22 11:30 UTC (permalink / raw)
To: Jens Axboe
Cc: David Howells, Al Viro, Linus Torvalds, Christoph Hellwig,
Christian Brauner, David Laight, Matthew Wilcox, Brendan Higgins,
David Gow, linux-fsdevel, linux-block, linux-mm, netdev,
linux-kselftest, kunit-dev, linux-kernel, Christian Brauner,
David Hildenbrand, John Hubbard
Add a kunit test to benchmark an xarray containing 256MiB of data getting
decanted into 256-page BVEC iterators that get copied from - modelling
bufferage being drawn from the pagecache and batched up for I/O.
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Christoph Hellwig <hch@lst.de>
cc: Christian Brauner <brauner@kernel.org>
cc: Jens Axboe <axboe@kernel.dk>
cc: Al Viro <viro@zeniv.linux.org.uk>
cc: David Hildenbrand <david@redhat.com>
cc: John Hubbard <jhubbard@nvidia.com>
cc: Brendan Higgins <brendanhiggins@google.com>
cc: David Gow <davidgow@google.com>
cc: linux-kselftest@vger.kernel.org
cc: kunit-dev@googlegroups.com
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
---
lib/kunit_iov_iter.c | 87 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 87 insertions(+)
diff --git a/lib/kunit_iov_iter.c b/lib/kunit_iov_iter.c
index 1a43e9518a63..2fbe6f2afb26 100644
--- a/lib/kunit_iov_iter.c
+++ b/lib/kunit_iov_iter.c
@@ -1509,6 +1509,92 @@ static void __init iov_kunit_benchmark_xarray(struct kunit *test)
KUNIT_SUCCEED();
}
+/*
+ * Time copying 256MiB through an ITER_XARRAY, decanting it to ITER_BVECs.
+ */
+static void __init iov_kunit_benchmark_xarray_to_bvec(struct kunit *test)
+{
+ struct iov_iter xiter;
+ struct xarray *xarray;
+ struct page *page;
+ unsigned int samples[IOV_KUNIT_NR_SAMPLES];
+ ktime_t a, b;
+ ssize_t copied;
+ size_t size = 256 * 1024 * 1024, npages = size / PAGE_SIZE;
+ void *scratch;
+ int i;
+
+ /* Allocate a page and tile it repeatedly in the buffer. */
+ page = alloc_page(GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, page);
+ kunit_add_action_or_reset(test, iov_kunit_free_page, page);
+
+ xarray = iov_kunit_create_xarray(test);
+
+ for (i = 0; i < npages; i++) {
+ void *x = xa_store(xarray, i, page, GFP_KERNEL);
+
+ KUNIT_ASSERT_FALSE(test, xa_is_err(x));
+ }
+
+ /* Create a single large buffer to copy to/from. */
+ scratch = iov_kunit_create_source(test, npages);
+
+ /* Perform and time a bunch of copies. */
+ kunit_info(test, "Benchmarking copy_to_iter() over BVECs decanted from an XARRAY:\n");
+ for (i = 0; i < IOV_KUNIT_NR_SAMPLES; i++) {
+ size = 256 * 1024 * 1024;
+ iov_iter_xarray(&xiter, ITER_SOURCE, xarray, 0, size);
+ a = ktime_get_real();
+
+ do {
+ struct iov_iter biter;
+ struct bio_vec *bvec;
+ struct page **pages;
+ size_t req, part, offset0, got;
+ int j;
+
+ npages = 256;
+ req = min_t(size_t, size, npages * PAGE_SIZE);
+ bvec = kunit_kmalloc_array(test, npages, sizeof(bvec[0]), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, bvec);
+
+ pages = (void *)bvec + array_size(npages, sizeof(bvec[0])) -
+ array_size(npages, sizeof(*pages));
+
+ part = iov_iter_extract_pages(&xiter, &pages, req,
+ npages, 0, &offset0);
+ KUNIT_EXPECT_NE(test, part, 0);
+ KUNIT_EXPECT_GT(test, part, 0);
+
+ j = 0;
+ got = part;
+ do {
+ size_t chunk = min_t(size_t, got, PAGE_SIZE - offset0);
+
+ bvec_set_page(&bvec[j++], page, chunk, offset0);
+ offset0 = 0;
+ got -= chunk;
+ } while (got > 0);
+
+ iov_iter_bvec(&biter, ITER_SOURCE, bvec, j, part);
+ copied = copy_from_iter(scratch, part, &biter);
+ KUNIT_EXPECT_EQ(test, copied, part);
+ size -= copied;
+ if (test->status == KUNIT_FAILURE)
+ break;
+ } while (size > 0);
+
+ b = ktime_get_real();
+ samples[i] = ktime_to_us(ktime_sub(b, a));
+ if (test->status == KUNIT_FAILURE)
+ break;
+ }
+
+ iov_kunit_benchmark_print_stats(test, samples);
+ KUNIT_SUCCEED();
+}
+
static struct kunit_case __refdata iov_kunit_cases[] = {
KUNIT_CASE(iov_kunit_copy_to_ubuf),
KUNIT_CASE(iov_kunit_copy_from_ubuf),
@@ -1529,6 +1615,7 @@ static struct kunit_case __refdata iov_kunit_cases[] = {
KUNIT_CASE(iov_kunit_benchmark_bvec),
KUNIT_CASE(iov_kunit_benchmark_bvec_split),
KUNIT_CASE(iov_kunit_benchmark_xarray),
+ KUNIT_CASE(iov_kunit_benchmark_xarray_to_bvec),
{}
};
^ permalink raw reply related [flat|nested] 15+ messages in thread* [PATCH v3 10/10] iov_iter: Add benchmarking kunit tests for UBUF/IOVEC
2023-09-22 11:30 [PATCH v3 00/10] iov_iter: kunit: Cleanup, abstraction and more tests David Howells
` (8 preceding siblings ...)
2023-09-22 11:30 ` [PATCH v3 09/10] iov_iter: Add kunit to benchmark decanting of xarray to bvec David Howells
@ 2023-09-22 11:30 ` David Howells
9 siblings, 0 replies; 15+ messages in thread
From: David Howells @ 2023-09-22 11:30 UTC (permalink / raw)
To: Jens Axboe
Cc: David Howells, Al Viro, Linus Torvalds, Christoph Hellwig,
Christian Brauner, David Laight, Matthew Wilcox, Brendan Higgins,
David Gow, linux-fsdevel, linux-block, linux-mm, netdev,
linux-kselftest, kunit-dev, linux-kernel, Andrew Morton,
Christian Brauner, David Hildenbrand, John Hubbard
Add kunit tests to benchmark 256MiB copies to a UBUF iterator and an IOVEC
iterator. This attaches a userspace VM with a mapped file in it
temporarily to the test thread.
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Andrew Morton <akpm@linux-foundation.org>
cc: Christoph Hellwig <hch@lst.de>
cc: Christian Brauner <brauner@kernel.org>
cc: Jens Axboe <axboe@kernel.dk>
cc: Al Viro <viro@zeniv.linux.org.uk>
cc: Matthew Wilcox <willy@infradead.org>
cc: David Hildenbrand <david@redhat.com>
cc: John Hubbard <jhubbard@nvidia.com>
cc: Brendan Higgins <brendanhiggins@google.com>
cc: David Gow <davidgow@google.com>
cc: linux-kselftest@vger.kernel.org
cc: kunit-dev@googlegroups.com
cc: linux-mm@kvack.org
cc: linux-fsdevel@vger.kernel.org
---
lib/kunit_iov_iter.c | 95 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 95 insertions(+)
diff --git a/lib/kunit_iov_iter.c b/lib/kunit_iov_iter.c
index 2fbe6f2afb26..d5b7517f4f47 100644
--- a/lib/kunit_iov_iter.c
+++ b/lib/kunit_iov_iter.c
@@ -1325,6 +1325,99 @@ static void *__init iov_kunit_create_source(struct kunit *test, size_t npages)
return scratch;
}
+/*
+ * Time copying 256MiB through an ITER_UBUF.
+ */
+static void __init iov_kunit_benchmark_ubuf(struct kunit *test)
+{
+ struct iov_iter iter;
+ unsigned int samples[IOV_KUNIT_NR_SAMPLES];
+ ktime_t a, b;
+ ssize_t copied;
+ size_t size = 256 * 1024 * 1024, npages = size / PAGE_SIZE;
+ void *scratch;
+ int i;
+ u8 __user *buffer;
+
+ /* Allocate a huge buffer and populate it with pages. */
+ buffer = iov_kunit_create_user_buf(test, npages, NULL);
+
+ /* Create a single large buffer to copy to/from. */
+ scratch = iov_kunit_create_source(test, npages);
+
+ /* Perform and time a bunch of copies. */
+ kunit_info(test, "Benchmarking copy_to_iter() over UBUF:\n");
+ for (i = 0; i < IOV_KUNIT_NR_SAMPLES; i++) {
+ size_t remain = size;
+
+ a = ktime_get_real();
+ do {
+ size_t part = min(remain, PAGE_SIZE);
+
+ iov_iter_ubuf(&iter, ITER_SOURCE, buffer, part);
+ copied = copy_from_iter(scratch, part, &iter);
+ KUNIT_EXPECT_EQ(test, copied, part);
+ remain -= part;
+ } while (remain > 0);
+ b = ktime_get_real();
+ samples[i] = ktime_to_us(ktime_sub(b, a));
+ }
+
+ iov_kunit_benchmark_print_stats(test, samples);
+ KUNIT_SUCCEED();
+}
+
+/*
+ * Time copying 256MiB through an ITER_IOVEC.
+ */
+static void __init iov_kunit_benchmark_iovec(struct kunit *test)
+{
+ struct iov_iter iter;
+ struct iovec *iov;
+ unsigned int samples[IOV_KUNIT_NR_SAMPLES];
+ ktime_t a, b;
+ ssize_t copied;
+ size_t size = 256 * 1024 * 1024, npages = size / PAGE_SIZE, part;
+ size_t ioc = size / PAGE_SIZE;
+ void *scratch;
+ int i;
+ u8 __user *buffer;
+
+ iov = kunit_kmalloc_array(test, ioc, sizeof(*iov), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, iov);
+
+ /* Allocate a huge buffer and populate it with pages. */
+ buffer = iov_kunit_create_user_buf(test, npages, NULL);
+
+ /* Create a single large buffer to copy to/from. */
+ scratch = iov_kunit_create_source(test, npages);
+
+ /* Split the target over a number of iovecs */
+ copied = 0;
+ for (i = 0; i < ioc; i++) {
+ part = size / ioc;
+ iov[i].iov_base = buffer + copied;
+ iov[i].iov_len = part;
+ copied += part;
+ }
+ iov[i - 1].iov_len += size - part;
+
+ /* Perform and time a bunch of copies. */
+ kunit_info(test, "Benchmarking copy_to_iter() over IOVEC:\n");
+ for (i = 0; i < IOV_KUNIT_NR_SAMPLES; i++) {
+ iov_iter_init(&iter, ITER_SOURCE, iov, npages, size);
+
+ a = ktime_get_real();
+ copied = copy_from_iter(scratch, size, &iter);
+ b = ktime_get_real();
+ KUNIT_EXPECT_EQ(test, copied, size);
+ samples[i] = ktime_to_us(ktime_sub(b, a));
+ }
+
+ iov_kunit_benchmark_print_stats(test, samples);
+ KUNIT_SUCCEED();
+}
+
/*
* Time copying 256MiB through an ITER_KVEC.
*/
@@ -1611,6 +1704,8 @@ static struct kunit_case __refdata iov_kunit_cases[] = {
KUNIT_CASE(iov_kunit_extract_pages_kvec),
KUNIT_CASE(iov_kunit_extract_pages_bvec),
KUNIT_CASE(iov_kunit_extract_pages_xarray),
+ KUNIT_CASE(iov_kunit_benchmark_ubuf),
+ KUNIT_CASE(iov_kunit_benchmark_iovec),
KUNIT_CASE(iov_kunit_benchmark_kvec),
KUNIT_CASE(iov_kunit_benchmark_bvec),
KUNIT_CASE(iov_kunit_benchmark_bvec_split),
^ permalink raw reply related [flat|nested] 15+ messages in thread