From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
To: linux-mm@kvack.org, akpm@linux-foundation.org
Cc: mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org,
kaleshsingh@google.com, npiggin@gmail.com,
joel@joelfernandes.org,
Christophe Leroy <christophe.leroy@csgroup.eu>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Subject: [PATCH v5 2/9] selftest/mremap_test: Avoid crash with static build
Date: Thu, 22 Apr 2021 11:13:16 +0530 [thread overview]
Message-ID: <20210422054323.150993-3-aneesh.kumar@linux.ibm.com> (raw)
In-Reply-To: <20210422054323.150993-1-aneesh.kumar@linux.ibm.com>
With a large mmap map size, we can overlap with the text area and using
MAP_FIXED results in unmapping that area. Switch to MAP_FIXED_NOREPLACE
and handle the EEXIST error.
Reviewed-by: Kalesh Singh <kaleshsingh@google.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
tools/testing/selftests/vm/mremap_test.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/vm/mremap_test.c b/tools/testing/selftests/vm/mremap_test.c
index c9a5461eb786..0624d1bd71b5 100644
--- a/tools/testing/selftests/vm/mremap_test.c
+++ b/tools/testing/selftests/vm/mremap_test.c
@@ -75,9 +75,10 @@ static void *get_source_mapping(struct config c)
retry:
addr += c.src_alignment;
src_addr = mmap((void *) addr, c.region_size, PROT_READ | PROT_WRITE,
- MAP_FIXED | MAP_ANONYMOUS | MAP_SHARED, -1, 0);
+ MAP_FIXED_NOREPLACE | MAP_ANONYMOUS | MAP_SHARED,
+ -1, 0);
if (src_addr == MAP_FAILED) {
- if (errno == EPERM)
+ if (errno == EPERM || errno == EEXIST)
goto retry;
goto error;
}
--
2.30.2
WARNING: multiple messages have this Message-ID (diff)
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
To: linux-mm@kvack.org, akpm@linux-foundation.org
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
npiggin@gmail.com, kaleshsingh@google.com,
joel@joelfernandes.org, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v5 2/9] selftest/mremap_test: Avoid crash with static build
Date: Thu, 22 Apr 2021 11:13:16 +0530 [thread overview]
Message-ID: <20210422054323.150993-3-aneesh.kumar@linux.ibm.com> (raw)
In-Reply-To: <20210422054323.150993-1-aneesh.kumar@linux.ibm.com>
With a large mmap map size, we can overlap with the text area and using
MAP_FIXED results in unmapping that area. Switch to MAP_FIXED_NOREPLACE
and handle the EEXIST error.
Reviewed-by: Kalesh Singh <kaleshsingh@google.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
tools/testing/selftests/vm/mremap_test.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/vm/mremap_test.c b/tools/testing/selftests/vm/mremap_test.c
index c9a5461eb786..0624d1bd71b5 100644
--- a/tools/testing/selftests/vm/mremap_test.c
+++ b/tools/testing/selftests/vm/mremap_test.c
@@ -75,9 +75,10 @@ static void *get_source_mapping(struct config c)
retry:
addr += c.src_alignment;
src_addr = mmap((void *) addr, c.region_size, PROT_READ | PROT_WRITE,
- MAP_FIXED | MAP_ANONYMOUS | MAP_SHARED, -1, 0);
+ MAP_FIXED_NOREPLACE | MAP_ANONYMOUS | MAP_SHARED,
+ -1, 0);
if (src_addr == MAP_FAILED) {
- if (errno == EPERM)
+ if (errno == EPERM || errno == EEXIST)
goto retry;
goto error;
}
--
2.30.2
next prev parent reply other threads:[~2021-04-22 5:43 UTC|newest]
Thread overview: 106+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-22 5:43 [PATCH v5 0/9] Speedup mremap on ppc64 Aneesh Kumar K.V
2021-04-22 5:43 ` Aneesh Kumar K.V
2021-04-22 5:43 ` [PATCH v5 1/9] selftest/mremap_test: Update the test to handle pagesize other than 4K Aneesh Kumar K.V
2021-04-22 5:43 ` Aneesh Kumar K.V
2021-04-22 5:43 ` Aneesh Kumar K.V [this message]
2021-04-22 5:43 ` [PATCH v5 2/9] selftest/mremap_test: Avoid crash with static build Aneesh Kumar K.V
2021-04-22 5:43 ` [PATCH v5 3/9] mm/mremap: Use pmd/pud_poplulate to update page table entries Aneesh Kumar K.V
2021-04-22 5:43 ` Aneesh Kumar K.V
2021-05-18 20:04 ` Nathan Chancellor
2021-05-18 20:04 ` Nathan Chancellor
2021-05-19 4:46 ` Aneesh Kumar K.V
2021-05-19 4:46 ` Aneesh Kumar K.V
2021-05-19 18:02 ` Nathan Chancellor
2021-05-19 18:02 ` Nathan Chancellor
2021-05-20 2:18 ` Peter Xu
2021-05-20 2:18 ` Peter Xu
2021-05-20 8:26 ` Aneesh Kumar K.V
2021-05-20 8:26 ` Aneesh Kumar K.V
2021-05-20 12:46 ` Peter Xu
2021-05-20 12:46 ` Peter Xu
2021-05-20 13:23 ` Aneesh Kumar K.V
2021-05-20 13:23 ` Aneesh Kumar K.V
2021-05-20 13:37 ` Aneesh Kumar K.V
2021-05-20 13:37 ` Aneesh Kumar K.V
2021-05-20 14:57 ` Peter Xu
2021-05-20 14:57 ` Peter Xu
2021-05-20 19:06 ` Zi Yan
2021-05-20 19:06 ` Zi Yan
2021-05-20 20:01 ` Peter Xu
2021-05-20 20:01 ` Peter Xu
2021-05-20 20:25 ` Kalesh Singh
2021-05-20 20:25 ` Kalesh Singh
2021-04-22 5:43 ` [PATCH v5 4/9] powerpc/mm/book3s64: Fix possible build error Aneesh Kumar K.V
2021-04-22 5:43 ` Aneesh Kumar K.V
2021-04-22 5:43 ` [PATCH v5 5/9] powerpc/mm/book3s64: Update tlb flush routines to take a page walk cache flush argument Aneesh Kumar K.V
2021-04-22 5:43 ` Aneesh Kumar K.V
2021-05-15 16:35 ` Guenter Roeck
2021-05-15 16:35 ` Guenter Roeck
2021-05-15 20:41 ` Andrew Morton
2021-05-15 20:41 ` Andrew Morton
2021-05-15 23:05 ` Guenter Roeck
2021-05-15 23:05 ` Guenter Roeck
2021-05-17 8:40 ` Aneesh Kumar K.V
2021-05-17 8:40 ` Aneesh Kumar K.V
2021-05-17 13:38 ` Guenter Roeck
2021-05-17 13:38 ` Guenter Roeck
2021-05-17 13:55 ` Aneesh Kumar K.V
2021-05-17 13:55 ` Aneesh Kumar K.V
2021-05-17 14:18 ` Guenter Roeck
2021-05-17 14:18 ` Guenter Roeck
2021-05-19 0:26 ` Michael Ellerman
2021-05-19 0:26 ` Michael Ellerman
2021-05-19 0:45 ` Segher Boessenkool
2021-05-19 0:45 ` Segher Boessenkool
2021-05-19 12:03 ` Segher Boessenkool
2021-05-19 13:37 ` Guenter Roeck
2021-05-19 14:20 ` Segher Boessenkool
2021-05-19 14:20 ` Segher Boessenkool
2021-05-19 15:28 ` Guenter Roeck
2021-05-19 15:28 ` Guenter Roeck
2021-05-20 7:37 ` Michael Ellerman
2021-05-20 12:17 ` Segher Boessenkool
2021-05-19 1:08 ` Guenter Roeck
2021-05-19 1:08 ` Guenter Roeck
2021-05-20 11:38 ` Michael Ellerman
2021-05-20 11:38 ` Michael Ellerman
2021-05-20 11:56 ` Guenter Roeck
2021-05-20 11:56 ` Guenter Roeck
2021-04-22 5:43 ` [PATCH v5 6/9] mm/mremap: Use range flush that does TLB and page walk cache flush Aneesh Kumar K.V
2021-04-22 5:43 ` Aneesh Kumar K.V
2021-04-22 5:43 ` [PATCH v5 7/9] mm/mremap: Move TLB flush outside page table lock Aneesh Kumar K.V
2021-04-22 5:43 ` Aneesh Kumar K.V
2021-05-20 15:26 ` Aneesh Kumar K.V
2021-05-20 15:26 ` Aneesh Kumar K.V
2021-05-20 16:57 ` Aneesh Kumar K.V
2021-05-20 16:57 ` Aneesh Kumar K.V
2021-05-21 2:40 ` Linus Torvalds
2021-05-21 2:40 ` Linus Torvalds
2021-05-21 3:03 ` Aneesh Kumar K.V
2021-05-21 3:03 ` Aneesh Kumar K.V
2021-05-21 3:28 ` Aneesh Kumar K.V
2021-05-21 3:28 ` Aneesh Kumar K.V
2021-05-21 6:13 ` Linus Torvalds
2021-05-21 6:13 ` Linus Torvalds
2021-05-21 12:50 ` Aneesh Kumar K.V
2021-05-21 12:50 ` Aneesh Kumar K.V
2021-05-21 13:03 ` Aneesh Kumar K.V
2021-05-21 13:03 ` Aneesh Kumar K.V
2021-05-21 16:03 ` Linus Torvalds
2021-05-21 16:03 ` Linus Torvalds
2021-05-21 16:29 ` Aneesh Kumar K.V
2021-05-21 16:29 ` Aneesh Kumar K.V
2021-05-24 14:24 ` Aneesh Kumar K.V
2021-05-24 14:24 ` Aneesh Kumar K.V
2021-05-21 15:24 ` Liam Howlett
2021-05-21 15:24 ` Liam Howlett
2021-05-21 16:02 ` Aneesh Kumar K.V
2021-05-21 16:02 ` Aneesh Kumar K.V
2021-05-21 16:05 ` Linus Torvalds
2021-05-21 16:05 ` Linus Torvalds
2021-04-22 5:43 ` [PATCH v5 8/9] mm/mremap: Allow arch runtime override Aneesh Kumar K.V
2021-04-22 5:43 ` Aneesh Kumar K.V
2021-04-22 5:43 ` [PATCH v5 9/9] powerpc/mm: Enable move pmd/pud Aneesh Kumar K.V
2021-04-22 5:43 ` Aneesh Kumar K.V
2021-05-11 22:19 ` Andrew Morton
2021-05-11 22:19 ` Andrew Morton
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