Public bug reported:
Failure observed on TF arm-server with oracular:linux-lowlatency
6.11.0-1012.13 (2025.03.17).
Log output:
---(snip)---
tst_test.c:1833: TINFO: === Testing on xfs ===
tst_test.c:1170: TINFO: Formatting /dev/loop0 with xfs opts='' extra
opts=''
tst_test.c:1182: TINFO: Mounting /dev/loop0 to
/tmp/ltp-uA5omilvmh/LTP_memimR6Vj/mntdir fstyp=xfs flags=0
memcontrol03.c:144: TINFO: Child 92595 in leaf_C: Allocating pagecache:
52428800
memcontrol03.c:144: TINFO: Child 92596 in leaf_D: Allocating pagecache:
52428800
memcontrol03.c:144: TINFO: Child 92597 in leaf_F: Allocating pagecache:
52428800
memcontrol03.c:107: TINFO: Child 92598 in trunk_G: Allocating anon:
155189248
memcontrol03.c:121: TPASS: Child 92598 exited
memcontrol03.c:208: TPASS: Expect: (A/B memory.current=52822016) ~=
52428800
(A)> memcontrol03.c:214: TPASS: Expect: (A/B/C memory.current=23134208) ~=
34603008
(A)> memcontrol03.c:216: TPASS: Expect: (A/B/D memory.current=25165824) ~=
17825792
memcontrol03.c:218: TPASS: Expect: (A/B/E memory.current=0) ~= 0
memcontrol03.c:107: TINFO: Child 92599 in trunk_G: Allocating anon:
178257920
memcontrol03.c:116: TPASS: Child 92599 killed by OOM
memcontrol03.c:224: TPASS: Expect: (A/B memory.current=46661632) ~=
52428800
tst_test.c:1833: TINFO: === Testing on btrfs ===
tst_test.c:1170: TINFO: Formatting /dev/loop0 with btrfs opts='' extra
opts=''
tst_test.c:1182: TINFO: Mounting /dev/loop0 to
/tmp/ltp-uA5omilvmh/LTP_memimR6Vj/mntdir fstyp=btrfs flags=0
memcontrol03.c:144: TINFO: Child 92624 in leaf_C: Allocating pagecache:
52428800
memcontrol03.c:144: TINFO: Child 92625 in leaf_D: Allocating pagecache:
52428800
memcontrol03.c:144: TINFO: Child 92626 in leaf_F: Allocating pagecache:
52428800
memcontrol03.c:107: TINFO: Child 92627 in trunk_G: Allocating anon:
155189248
memcontrol03.c:121: TPASS: Child 92627 exited
(B)> memcontrol03.c:208: TFAIL: Expect: (A/B memory.current=38469632) ~=
52428800
(A)> memcontrol03.c:214: TFAIL: Expect: (A/B/C memory.current=19070976) ~=
34603008
(A)> memcontrol03.c:216: TPASS: Expect: (A/B/D memory.current=18939904) ~=
17825792
memcontrol03.c:218: TPASS: Expect: (A/B/E memory.current=0) ~= 0
memcontrol03.c:107: TINFO: Child 92628 in trunk_G: Allocating anon:
178257920
memcontrol03.c:116: TPASS: Child 92628 killed by OOM
(B)> memcontrol03.c:224: TFAIL: Expect: (A/B memory.current=38404096) ~=
52428800
There seems to be two issues that led to the test case failure:
* (A). proportional protection seems not to work (in the above log, the results
were out of expected range only for testing on btrfs)
* (B). on btrfs, memory reclaimed more than expected
Looking back at the test history, issue (A) seems to have been present
at least since 2024.10.28, which is the oldest cycle for which I can
search the logs. It just hadn't been caught due to *lenient* criteria
until now.
** Affects: ubuntu-kernel-tests
Importance: Undecided
Status: New
** Tags: oracular ubuntu-ltp-controllers
** Description changed:
Failure observed on TF arm-server with oracular:linux-lowlatency
6.11.0-1012.13 (2025.03.17).
Log output:
- ---(snip)---
- tst_test.c:1833: TINFO: === Testing on xfs ===
- tst_test.c:1170: TINFO: Formatting /dev/loop0 with xfs opts='' extra
opts=''
- tst_test.c:1182: TINFO: Mounting /dev/loop0 to
/tmp/ltp-uA5omilvmh/LTP_memimR6Vj/mntdir fstyp=xfs flags=0
- memcontrol03.c:144: TINFO: Child 92595 in leaf_C: Allocating pagecache:
52428800
- memcontrol03.c:144: TINFO: Child 92596 in leaf_D: Allocating pagecache:
52428800
- memcontrol03.c:144: TINFO: Child 92597 in leaf_F: Allocating pagecache:
52428800
- memcontrol03.c:107: TINFO: Child 92598 in trunk_G: Allocating anon:
155189248
- memcontrol03.c:121: TPASS: Child 92598 exited
- memcontrol03.c:208: TPASS: Expect: (A/B memory.current=52822016) ~=
52428800
- (*1)> memcontrol03.c:214: TPASS: Expect: (A/B/C memory.current=23134208) ~=
34603008
- (*1)> memcontrol03.c:216: TPASS: Expect: (A/B/D memory.current=25165824) ~=
17825792
- memcontrol03.c:218: TPASS: Expect: (A/B/E memory.current=0) ~= 0
- memcontrol03.c:107: TINFO: Child 92599 in trunk_G: Allocating anon:
178257920
- memcontrol03.c:116: TPASS: Child 92599 killed by OOM
- memcontrol03.c:224: TPASS: Expect: (A/B memory.current=46661632) ~=
52428800
- tst_test.c:1833: TINFO: === Testing on btrfs ===
- tst_test.c:1170: TINFO: Formatting /dev/loop0 with btrfs opts='' extra
opts=''
- tst_test.c:1182: TINFO: Mounting /dev/loop0 to
/tmp/ltp-uA5omilvmh/LTP_memimR6Vj/mntdir fstyp=btrfs flags=0
- memcontrol03.c:144: TINFO: Child 92624 in leaf_C: Allocating pagecache:
52428800
- memcontrol03.c:144: TINFO: Child 92625 in leaf_D: Allocating pagecache:
52428800
- memcontrol03.c:144: TINFO: Child 92626 in leaf_F: Allocating pagecache:
52428800
- memcontrol03.c:107: TINFO: Child 92627 in trunk_G: Allocating anon:
155189248
- memcontrol03.c:121: TPASS: Child 92627 exited
- (*2)> memcontrol03.c:208: TFAIL: Expect: (A/B memory.current=38469632) ~=
52428800
- (*1)> memcontrol03.c:214: TFAIL: Expect: (A/B/C memory.current=19070976) ~=
34603008
- (*1)> memcontrol03.c:216: TPASS: Expect: (A/B/D memory.current=18939904) ~=
17825792
- memcontrol03.c:218: TPASS: Expect: (A/B/E memory.current=0) ~= 0
- memcontrol03.c:107: TINFO: Child 92628 in trunk_G: Allocating anon:
178257920
- memcontrol03.c:116: TPASS: Child 92628 killed by OOM
- (*2)> memcontrol03.c:224: TFAIL: Expect: (A/B memory.current=38404096) ~=
52428800
-
+ ---(snip)---
+ tst_test.c:1833: TINFO: === Testing on xfs ===
+ tst_test.c:1170: TINFO: Formatting /dev/loop0 with xfs opts='' extra
opts=''
+ tst_test.c:1182: TINFO: Mounting /dev/loop0 to
/tmp/ltp-uA5omilvmh/LTP_memimR6Vj/mntdir fstyp=xfs flags=0
+ memcontrol03.c:144: TINFO: Child 92595 in leaf_C: Allocating pagecache:
52428800
+ memcontrol03.c:144: TINFO: Child 92596 in leaf_D: Allocating pagecache:
52428800
+ memcontrol03.c:144: TINFO: Child 92597 in leaf_F: Allocating pagecache:
52428800
+ memcontrol03.c:107: TINFO: Child 92598 in trunk_G: Allocating anon:
155189248
+ memcontrol03.c:121: TPASS: Child 92598 exited
+ memcontrol03.c:208: TPASS: Expect: (A/B memory.current=52822016) ~=
52428800
+ (A)> memcontrol03.c:214: TPASS: Expect: (A/B/C memory.current=23134208) ~=
34603008
+ (A)> memcontrol03.c:216: TPASS: Expect: (A/B/D memory.current=25165824) ~=
17825792
+ memcontrol03.c:218: TPASS: Expect: (A/B/E memory.current=0) ~= 0
+ memcontrol03.c:107: TINFO: Child 92599 in trunk_G: Allocating anon:
178257920
+ memcontrol03.c:116: TPASS: Child 92599 killed by OOM
+ memcontrol03.c:224: TPASS: Expect: (A/B memory.current=46661632) ~=
52428800
+ tst_test.c:1833: TINFO: === Testing on btrfs ===
+ tst_test.c:1170: TINFO: Formatting /dev/loop0 with btrfs opts='' extra
opts=''
+ tst_test.c:1182: TINFO: Mounting /dev/loop0 to
/tmp/ltp-uA5omilvmh/LTP_memimR6Vj/mntdir fstyp=btrfs flags=0
+ memcontrol03.c:144: TINFO: Child 92624 in leaf_C: Allocating pagecache:
52428800
+ memcontrol03.c:144: TINFO: Child 92625 in leaf_D: Allocating pagecache:
52428800
+ memcontrol03.c:144: TINFO: Child 92626 in leaf_F: Allocating pagecache:
52428800
+ memcontrol03.c:107: TINFO: Child 92627 in trunk_G: Allocating anon:
155189248
+ memcontrol03.c:121: TPASS: Child 92627 exited
+ (B)> memcontrol03.c:208: TFAIL: Expect: (A/B memory.current=38469632) ~=
52428800
+ (A)> memcontrol03.c:214: TFAIL: Expect: (A/B/C memory.current=19070976) ~=
34603008
+ (A)> memcontrol03.c:216: TPASS: Expect: (A/B/D memory.current=18939904) ~=
17825792
+ memcontrol03.c:218: TPASS: Expect: (A/B/E memory.current=0) ~= 0
+ memcontrol03.c:107: TINFO: Child 92628 in trunk_G: Allocating anon:
178257920
+ memcontrol03.c:116: TPASS: Child 92628 killed by OOM
+ (B)> memcontrol03.c:224: TFAIL: Expect: (A/B memory.current=38404096) ~=
52428800
There seems to be two issues that led to the test case failure:
- * (A). proportional protection seems not to work
+ * (A). proportional protection seems not to work (in the above log, the
results were out of expected range only for testing on btrfs)
* (B). on btrfs, memory reclaimed more than expected
Looking back at the test history, issue (A) seems to have been present
at least since 2024.10.28, which is the oldest cycle for which I can
search the logs. It just hadn't been caught due to *lenient* criteria
until now.
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https://bugs.launchpad.net/bugs/2106102
Title:
memcontrol03 from ubuntu_ltp_controller fails with memory.current
distribution deviating from expected proportions
Status in ubuntu-kernel-tests:
New
Bug description:
Failure observed on TF arm-server with oracular:linux-lowlatency
6.11.0-1012.13 (2025.03.17).
Log output:
---(snip)---
tst_test.c:1833: TINFO: === Testing on xfs ===
tst_test.c:1170: TINFO: Formatting /dev/loop0 with xfs opts='' extra
opts=''
tst_test.c:1182: TINFO: Mounting /dev/loop0 to
/tmp/ltp-uA5omilvmh/LTP_memimR6Vj/mntdir fstyp=xfs flags=0
memcontrol03.c:144: TINFO: Child 92595 in leaf_C: Allocating pagecache:
52428800
memcontrol03.c:144: TINFO: Child 92596 in leaf_D: Allocating pagecache:
52428800
memcontrol03.c:144: TINFO: Child 92597 in leaf_F: Allocating pagecache:
52428800
memcontrol03.c:107: TINFO: Child 92598 in trunk_G: Allocating anon:
155189248
memcontrol03.c:121: TPASS: Child 92598 exited
memcontrol03.c:208: TPASS: Expect: (A/B memory.current=52822016) ~=
52428800
(A)> memcontrol03.c:214: TPASS: Expect: (A/B/C memory.current=23134208) ~=
34603008
(A)> memcontrol03.c:216: TPASS: Expect: (A/B/D memory.current=25165824) ~=
17825792
memcontrol03.c:218: TPASS: Expect: (A/B/E memory.current=0) ~= 0
memcontrol03.c:107: TINFO: Child 92599 in trunk_G: Allocating anon:
178257920
memcontrol03.c:116: TPASS: Child 92599 killed by OOM
memcontrol03.c:224: TPASS: Expect: (A/B memory.current=46661632) ~=
52428800
tst_test.c:1833: TINFO: === Testing on btrfs ===
tst_test.c:1170: TINFO: Formatting /dev/loop0 with btrfs opts='' extra
opts=''
tst_test.c:1182: TINFO: Mounting /dev/loop0 to
/tmp/ltp-uA5omilvmh/LTP_memimR6Vj/mntdir fstyp=btrfs flags=0
memcontrol03.c:144: TINFO: Child 92624 in leaf_C: Allocating pagecache:
52428800
memcontrol03.c:144: TINFO: Child 92625 in leaf_D: Allocating pagecache:
52428800
memcontrol03.c:144: TINFO: Child 92626 in leaf_F: Allocating pagecache:
52428800
memcontrol03.c:107: TINFO: Child 92627 in trunk_G: Allocating anon:
155189248
memcontrol03.c:121: TPASS: Child 92627 exited
(B)> memcontrol03.c:208: TFAIL: Expect: (A/B memory.current=38469632) ~=
52428800
(A)> memcontrol03.c:214: TFAIL: Expect: (A/B/C memory.current=19070976) ~=
34603008
(A)> memcontrol03.c:216: TPASS: Expect: (A/B/D memory.current=18939904) ~=
17825792
memcontrol03.c:218: TPASS: Expect: (A/B/E memory.current=0) ~= 0
memcontrol03.c:107: TINFO: Child 92628 in trunk_G: Allocating anon:
178257920
memcontrol03.c:116: TPASS: Child 92628 killed by OOM
(B)> memcontrol03.c:224: TFAIL: Expect: (A/B memory.current=38404096) ~=
52428800
There seems to be two issues that led to the test case failure:
* (A). proportional protection seems not to work (in the above log, the
results were out of expected range only for testing on btrfs)
* (B). on btrfs, memory reclaimed more than expected
Looking back at the test history, issue (A) seems to have been present
at least since 2024.10.28, which is the oldest cycle for which I can
search the logs. It just hadn't been caught due to *lenient* criteria
until now.
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