From: Jan Stancek <jstancek@redhat.com>
To: Mike Kravetz <mike.kravetz@oracle.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Cc: hillf.zj@alibaba-inc.com, dave.hansen@linux.intel.com,
kirill.shutemov@linux.intel.com, mhocko@suse.cz,
n-horiguchi@ah.jp.nec.com, aneesh.kumar@linux.vnet.ibm.com,
iamjoonsoo.kim@lge.com
Subject: Re: [bug/regression] libhugetlbfs testsuite failures and OOMs eventually kill my system
Date: Fri, 14 Oct 2016 10:48:34 +0200 [thread overview]
Message-ID: <58009BE2.5010805@redhat.com> (raw)
In-Reply-To: <efa8b5c9-0138-69f9-0399-5580a086729d@oracle.com>
On 10/14/2016 01:26 AM, Mike Kravetz wrote:
>
> Hi Jan,
>
> Any chance you can get the contents of /sys/kernel/mm/hugepages
> before and after the first run of libhugetlbfs testsuite on Power?
> Perhaps a script like:
>
> cd /sys/kernel/mm/hugepages
> for f in hugepages-*/*; do
> n=`cat $f`;
> echo -e "$n\t$f";
> done
>
> Just want to make sure the numbers look as they should.
>
Hi Mike,
Numbers are below. I have also isolated a single testcase from "func"
group of tests: corrupt-by-cow-opt [1]. This test stops working if I
run it 19 times (with 20 hugepages). And if I disable this test,
"func" group tests can all pass repeatedly.
[1] https://github.com/libhugetlbfs/libhugetlbfs/blob/master/tests/corrupt-by-cow-opt.c
Regards,
Jan
Kernel is v4.8-14230-gb67be92, with reboot between each run.
1) Only func tests
System boot
After setup:
20 hugepages-16384kB/free_hugepages
20 hugepages-16384kB/nr_hugepages
20 hugepages-16384kB/nr_hugepages_mempolicy
0 hugepages-16384kB/nr_overcommit_hugepages
0 hugepages-16384kB/resv_hugepages
0 hugepages-16384kB/surplus_hugepages
0 hugepages-16777216kB/free_hugepages
0 hugepages-16777216kB/nr_hugepages
0 hugepages-16777216kB/nr_hugepages_mempolicy
0 hugepages-16777216kB/nr_overcommit_hugepages
0 hugepages-16777216kB/resv_hugepages
0 hugepages-16777216kB/surplus_hugepages
After func tests:
********** TEST SUMMARY
* 16M
* 32-bit 64-bit
* Total testcases: 0 85
* Skipped: 0 0
* PASS: 0 81
* FAIL: 0 4
* Killed by signal: 0 0
* Bad configuration: 0 0
* Expected FAIL: 0 0
* Unexpected PASS: 0 0
* Strange test result: 0 0
26 hugepages-16384kB/free_hugepages
26 hugepages-16384kB/nr_hugepages
26 hugepages-16384kB/nr_hugepages_mempolicy
0 hugepages-16384kB/nr_overcommit_hugepages
1 hugepages-16384kB/resv_hugepages
0 hugepages-16384kB/surplus_hugepages
0 hugepages-16777216kB/free_hugepages
0 hugepages-16777216kB/nr_hugepages
0 hugepages-16777216kB/nr_hugepages_mempolicy
0 hugepages-16777216kB/nr_overcommit_hugepages
0 hugepages-16777216kB/resv_hugepages
0 hugepages-16777216kB/surplus_hugepages
After test cleanup:
umount -a -t hugetlbfs
hugeadm --pool-pages-max ${HPSIZE}:0
1 hugepages-16384kB/free_hugepages
1 hugepages-16384kB/nr_hugepages
1 hugepages-16384kB/nr_hugepages_mempolicy
0 hugepages-16384kB/nr_overcommit_hugepages
1 hugepages-16384kB/resv_hugepages
1 hugepages-16384kB/surplus_hugepages
0 hugepages-16777216kB/free_hugepages
0 hugepages-16777216kB/nr_hugepages
0 hugepages-16777216kB/nr_hugepages_mempolicy
0 hugepages-16777216kB/nr_overcommit_hugepages
0 hugepages-16777216kB/resv_hugepages
0 hugepages-16777216kB/surplus_hugepages
---
2) Only stress tests
System boot
After setup:
20 hugepages-16384kB/free_hugepages
20 hugepages-16384kB/nr_hugepages
20 hugepages-16384kB/nr_hugepages_mempolicy
0 hugepages-16384kB/nr_overcommit_hugepages
0 hugepages-16384kB/resv_hugepages
0 hugepages-16384kB/surplus_hugepages
0 hugepages-16777216kB/free_hugepages
0 hugepages-16777216kB/nr_hugepages
0 hugepages-16777216kB/nr_hugepages_mempolicy
0 hugepages-16777216kB/nr_overcommit_hugepages
0 hugepages-16777216kB/resv_hugepages
0 hugepages-16777216kB/surplus_hugepages
After stress tests:
20 hugepages-16384kB/free_hugepages
20 hugepages-16384kB/nr_hugepages
20 hugepages-16384kB/nr_hugepages_mempolicy
0 hugepages-16384kB/nr_overcommit_hugepages
17 hugepages-16384kB/resv_hugepages
0 hugepages-16384kB/surplus_hugepages
0 hugepages-16777216kB/free_hugepages
0 hugepages-16777216kB/nr_hugepages
0 hugepages-16777216kB/nr_hugepages_mempolicy
0 hugepages-16777216kB/nr_overcommit_hugepages
0 hugepages-16777216kB/resv_hugepages
0 hugepages-16777216kB/surplus_hugepages
After cleanup:
17 hugepages-16384kB/free_hugepages
17 hugepages-16384kB/nr_hugepages
17 hugepages-16384kB/nr_hugepages_mempolicy
0 hugepages-16384kB/nr_overcommit_hugepages
17 hugepages-16384kB/resv_hugepages
17 hugepages-16384kB/surplus_hugepages
0 hugepages-16777216kB/free_hugepages
0 hugepages-16777216kB/nr_hugepages
0 hugepages-16777216kB/nr_hugepages_mempolicy
0 hugepages-16777216kB/nr_overcommit_hugepages
0 hugepages-16777216kB/resv_hugepages
0 hugepages-16777216kB/surplus_hugepages
---
3) only corrupt-by-cow-opt
System boot
After setup:
20 hugepages-16384kB/free_hugepages
20 hugepages-16384kB/nr_hugepages
20 hugepages-16384kB/nr_hugepages_mempolicy
0 hugepages-16384kB/nr_overcommit_hugepages
0 hugepages-16384kB/resv_hugepages
0 hugepages-16384kB/surplus_hugepages
0 hugepages-16777216kB/free_hugepages
0 hugepages-16777216kB/nr_hugepages
0 hugepages-16777216kB/nr_hugepages_mempolicy
0 hugepages-16777216kB/nr_overcommit_hugepages
0 hugepages-16777216kB/resv_hugepages
0 hugepages-16777216kB/surplus_hugepages
libhugetlbfs-2.18# env LD_LIBRARY_PATH=./obj64 ./tests/obj64/corrupt-by-cow-opt; /root/grab.sh
Starting testcase "./tests/obj64/corrupt-by-cow-opt", pid 3298
Write s to 0x3effff000000 via shared mapping
Write p to 0x3effff000000 via private mapping
Read s from 0x3effff000000 via shared mapping
PASS
20 hugepages-16384kB/free_hugepages
20 hugepages-16384kB/nr_hugepages
20 hugepages-16384kB/nr_hugepages_mempolicy
0 hugepages-16384kB/nr_overcommit_hugepages
1 hugepages-16384kB/resv_hugepages
0 hugepages-16384kB/surplus_hugepages
0 hugepages-16777216kB/free_hugepages
0 hugepages-16777216kB/nr_hugepages
0 hugepages-16777216kB/nr_hugepages_mempolicy
0 hugepages-16777216kB/nr_overcommit_hugepages
0 hugepages-16777216kB/resv_hugepages
0 hugepages-16777216kB/surplus_hugepages
# env LD_LIBRARY_PATH=./obj64 ./tests/obj64/corrupt-by-cow-opt; /root/grab.sh
Starting testcase "./tests/obj64/corrupt-by-cow-opt", pid 3312
Write s to 0x3effff000000 via shared mapping
Write p to 0x3effff000000 via private mapping
Read s from 0x3effff000000 via shared mapping
PASS
20 hugepages-16384kB/free_hugepages
20 hugepages-16384kB/nr_hugepages
20 hugepages-16384kB/nr_hugepages_mempolicy
0 hugepages-16384kB/nr_overcommit_hugepages
2 hugepages-16384kB/resv_hugepages
0 hugepages-16384kB/surplus_hugepages
0 hugepages-16777216kB/free_hugepages
0 hugepages-16777216kB/nr_hugepages
0 hugepages-16777216kB/nr_hugepages_mempolicy
0 hugepages-16777216kB/nr_overcommit_hugepages
0 hugepages-16777216kB/resv_hugepages
0 hugepages-16777216kB/surplus_hugepages
(... output cut from ~17 iterations ...)
# env LD_LIBRARY_PATH=./obj64 ./tests/obj64/corrupt-by-cow-opt; /root/grab.sh
Starting testcase "./tests/obj64/corrupt-by-cow-opt", pid 3686
Write s to 0x3effff000000 via shared mapping
Bus error
20 hugepages-16384kB/free_hugepages
20 hugepages-16384kB/nr_hugepages
20 hugepages-16384kB/nr_hugepages_mempolicy
0 hugepages-16384kB/nr_overcommit_hugepages
19 hugepages-16384kB/resv_hugepages
0 hugepages-16384kB/surplus_hugepages
0 hugepages-16777216kB/free_hugepages
0 hugepages-16777216kB/nr_hugepages
0 hugepages-16777216kB/nr_hugepages_mempolicy
0 hugepages-16777216kB/nr_overcommit_hugepages
0 hugepages-16777216kB/resv_hugepages
0 hugepages-16777216kB/surplus_hugepages
# env LD_LIBRARY_PATH=./obj64 ./tests/obj64/corrupt-by-cow-opt; /root/grab.sh
Starting testcase "./tests/obj64/corrupt-by-cow-opt", pid 3700
Write s to 0x3effff000000 via shared mapping
FAIL mmap() 2: Cannot allocate memory
20 hugepages-16384kB/free_hugepages
20 hugepages-16384kB/nr_hugepages
20 hugepages-16384kB/nr_hugepages_mempolicy
0 hugepages-16384kB/nr_overcommit_hugepages
19 hugepages-16384kB/resv_hugepages
0 hugepages-16384kB/surplus_hugepages
0 hugepages-16777216kB/free_hugepages
0 hugepages-16777216kB/nr_hugepages
0 hugepages-16777216kB/nr_hugepages_mempolicy
0 hugepages-16777216kB/nr_overcommit_hugepages
0 hugepages-16777216kB/resv_hugepages
0 hugepages-16777216kB/surplus_hugepages
--
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WARNING: multiple messages have this Message-ID (diff)
From: Jan Stancek <jstancek@redhat.com>
To: Mike Kravetz <mike.kravetz@oracle.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Cc: hillf.zj@alibaba-inc.com, dave.hansen@linux.intel.com,
kirill.shutemov@linux.intel.com, mhocko@suse.cz,
n-horiguchi@ah.jp.nec.com, aneesh.kumar@linux.vnet.ibm.com,
iamjoonsoo.kim@lge.com
Subject: Re: [bug/regression] libhugetlbfs testsuite failures and OOMs eventually kill my system
Date: Fri, 14 Oct 2016 10:48:34 +0200 [thread overview]
Message-ID: <58009BE2.5010805@redhat.com> (raw)
In-Reply-To: <efa8b5c9-0138-69f9-0399-5580a086729d@oracle.com>
On 10/14/2016 01:26 AM, Mike Kravetz wrote:
>
> Hi Jan,
>
> Any chance you can get the contents of /sys/kernel/mm/hugepages
> before and after the first run of libhugetlbfs testsuite on Power?
> Perhaps a script like:
>
> cd /sys/kernel/mm/hugepages
> for f in hugepages-*/*; do
> n=`cat $f`;
> echo -e "$n\t$f";
> done
>
> Just want to make sure the numbers look as they should.
>
Hi Mike,
Numbers are below. I have also isolated a single testcase from "func"
group of tests: corrupt-by-cow-opt [1]. This test stops working if I
run it 19 times (with 20 hugepages). And if I disable this test,
"func" group tests can all pass repeatedly.
[1] https://github.com/libhugetlbfs/libhugetlbfs/blob/master/tests/corrupt-by-cow-opt.c
Regards,
Jan
Kernel is v4.8-14230-gb67be92, with reboot between each run.
1) Only func tests
System boot
After setup:
20 hugepages-16384kB/free_hugepages
20 hugepages-16384kB/nr_hugepages
20 hugepages-16384kB/nr_hugepages_mempolicy
0 hugepages-16384kB/nr_overcommit_hugepages
0 hugepages-16384kB/resv_hugepages
0 hugepages-16384kB/surplus_hugepages
0 hugepages-16777216kB/free_hugepages
0 hugepages-16777216kB/nr_hugepages
0 hugepages-16777216kB/nr_hugepages_mempolicy
0 hugepages-16777216kB/nr_overcommit_hugepages
0 hugepages-16777216kB/resv_hugepages
0 hugepages-16777216kB/surplus_hugepages
After func tests:
********** TEST SUMMARY
* 16M
* 32-bit 64-bit
* Total testcases: 0 85
* Skipped: 0 0
* PASS: 0 81
* FAIL: 0 4
* Killed by signal: 0 0
* Bad configuration: 0 0
* Expected FAIL: 0 0
* Unexpected PASS: 0 0
* Strange test result: 0 0
26 hugepages-16384kB/free_hugepages
26 hugepages-16384kB/nr_hugepages
26 hugepages-16384kB/nr_hugepages_mempolicy
0 hugepages-16384kB/nr_overcommit_hugepages
1 hugepages-16384kB/resv_hugepages
0 hugepages-16384kB/surplus_hugepages
0 hugepages-16777216kB/free_hugepages
0 hugepages-16777216kB/nr_hugepages
0 hugepages-16777216kB/nr_hugepages_mempolicy
0 hugepages-16777216kB/nr_overcommit_hugepages
0 hugepages-16777216kB/resv_hugepages
0 hugepages-16777216kB/surplus_hugepages
After test cleanup:
umount -a -t hugetlbfs
hugeadm --pool-pages-max ${HPSIZE}:0
1 hugepages-16384kB/free_hugepages
1 hugepages-16384kB/nr_hugepages
1 hugepages-16384kB/nr_hugepages_mempolicy
0 hugepages-16384kB/nr_overcommit_hugepages
1 hugepages-16384kB/resv_hugepages
1 hugepages-16384kB/surplus_hugepages
0 hugepages-16777216kB/free_hugepages
0 hugepages-16777216kB/nr_hugepages
0 hugepages-16777216kB/nr_hugepages_mempolicy
0 hugepages-16777216kB/nr_overcommit_hugepages
0 hugepages-16777216kB/resv_hugepages
0 hugepages-16777216kB/surplus_hugepages
---
2) Only stress tests
System boot
After setup:
20 hugepages-16384kB/free_hugepages
20 hugepages-16384kB/nr_hugepages
20 hugepages-16384kB/nr_hugepages_mempolicy
0 hugepages-16384kB/nr_overcommit_hugepages
0 hugepages-16384kB/resv_hugepages
0 hugepages-16384kB/surplus_hugepages
0 hugepages-16777216kB/free_hugepages
0 hugepages-16777216kB/nr_hugepages
0 hugepages-16777216kB/nr_hugepages_mempolicy
0 hugepages-16777216kB/nr_overcommit_hugepages
0 hugepages-16777216kB/resv_hugepages
0 hugepages-16777216kB/surplus_hugepages
After stress tests:
20 hugepages-16384kB/free_hugepages
20 hugepages-16384kB/nr_hugepages
20 hugepages-16384kB/nr_hugepages_mempolicy
0 hugepages-16384kB/nr_overcommit_hugepages
17 hugepages-16384kB/resv_hugepages
0 hugepages-16384kB/surplus_hugepages
0 hugepages-16777216kB/free_hugepages
0 hugepages-16777216kB/nr_hugepages
0 hugepages-16777216kB/nr_hugepages_mempolicy
0 hugepages-16777216kB/nr_overcommit_hugepages
0 hugepages-16777216kB/resv_hugepages
0 hugepages-16777216kB/surplus_hugepages
After cleanup:
17 hugepages-16384kB/free_hugepages
17 hugepages-16384kB/nr_hugepages
17 hugepages-16384kB/nr_hugepages_mempolicy
0 hugepages-16384kB/nr_overcommit_hugepages
17 hugepages-16384kB/resv_hugepages
17 hugepages-16384kB/surplus_hugepages
0 hugepages-16777216kB/free_hugepages
0 hugepages-16777216kB/nr_hugepages
0 hugepages-16777216kB/nr_hugepages_mempolicy
0 hugepages-16777216kB/nr_overcommit_hugepages
0 hugepages-16777216kB/resv_hugepages
0 hugepages-16777216kB/surplus_hugepages
---
3) only corrupt-by-cow-opt
System boot
After setup:
20 hugepages-16384kB/free_hugepages
20 hugepages-16384kB/nr_hugepages
20 hugepages-16384kB/nr_hugepages_mempolicy
0 hugepages-16384kB/nr_overcommit_hugepages
0 hugepages-16384kB/resv_hugepages
0 hugepages-16384kB/surplus_hugepages
0 hugepages-16777216kB/free_hugepages
0 hugepages-16777216kB/nr_hugepages
0 hugepages-16777216kB/nr_hugepages_mempolicy
0 hugepages-16777216kB/nr_overcommit_hugepages
0 hugepages-16777216kB/resv_hugepages
0 hugepages-16777216kB/surplus_hugepages
libhugetlbfs-2.18# env LD_LIBRARY_PATH=./obj64 ./tests/obj64/corrupt-by-cow-opt; /root/grab.sh
Starting testcase "./tests/obj64/corrupt-by-cow-opt", pid 3298
Write s to 0x3effff000000 via shared mapping
Write p to 0x3effff000000 via private mapping
Read s from 0x3effff000000 via shared mapping
PASS
20 hugepages-16384kB/free_hugepages
20 hugepages-16384kB/nr_hugepages
20 hugepages-16384kB/nr_hugepages_mempolicy
0 hugepages-16384kB/nr_overcommit_hugepages
1 hugepages-16384kB/resv_hugepages
0 hugepages-16384kB/surplus_hugepages
0 hugepages-16777216kB/free_hugepages
0 hugepages-16777216kB/nr_hugepages
0 hugepages-16777216kB/nr_hugepages_mempolicy
0 hugepages-16777216kB/nr_overcommit_hugepages
0 hugepages-16777216kB/resv_hugepages
0 hugepages-16777216kB/surplus_hugepages
# env LD_LIBRARY_PATH=./obj64 ./tests/obj64/corrupt-by-cow-opt; /root/grab.sh
Starting testcase "./tests/obj64/corrupt-by-cow-opt", pid 3312
Write s to 0x3effff000000 via shared mapping
Write p to 0x3effff000000 via private mapping
Read s from 0x3effff000000 via shared mapping
PASS
20 hugepages-16384kB/free_hugepages
20 hugepages-16384kB/nr_hugepages
20 hugepages-16384kB/nr_hugepages_mempolicy
0 hugepages-16384kB/nr_overcommit_hugepages
2 hugepages-16384kB/resv_hugepages
0 hugepages-16384kB/surplus_hugepages
0 hugepages-16777216kB/free_hugepages
0 hugepages-16777216kB/nr_hugepages
0 hugepages-16777216kB/nr_hugepages_mempolicy
0 hugepages-16777216kB/nr_overcommit_hugepages
0 hugepages-16777216kB/resv_hugepages
0 hugepages-16777216kB/surplus_hugepages
(... output cut from ~17 iterations ...)
# env LD_LIBRARY_PATH=./obj64 ./tests/obj64/corrupt-by-cow-opt; /root/grab.sh
Starting testcase "./tests/obj64/corrupt-by-cow-opt", pid 3686
Write s to 0x3effff000000 via shared mapping
Bus error
20 hugepages-16384kB/free_hugepages
20 hugepages-16384kB/nr_hugepages
20 hugepages-16384kB/nr_hugepages_mempolicy
0 hugepages-16384kB/nr_overcommit_hugepages
19 hugepages-16384kB/resv_hugepages
0 hugepages-16384kB/surplus_hugepages
0 hugepages-16777216kB/free_hugepages
0 hugepages-16777216kB/nr_hugepages
0 hugepages-16777216kB/nr_hugepages_mempolicy
0 hugepages-16777216kB/nr_overcommit_hugepages
0 hugepages-16777216kB/resv_hugepages
0 hugepages-16777216kB/surplus_hugepages
# env LD_LIBRARY_PATH=./obj64 ./tests/obj64/corrupt-by-cow-opt; /root/grab.sh
Starting testcase "./tests/obj64/corrupt-by-cow-opt", pid 3700
Write s to 0x3effff000000 via shared mapping
FAIL mmap() 2: Cannot allocate memory
20 hugepages-16384kB/free_hugepages
20 hugepages-16384kB/nr_hugepages
20 hugepages-16384kB/nr_hugepages_mempolicy
0 hugepages-16384kB/nr_overcommit_hugepages
19 hugepages-16384kB/resv_hugepages
0 hugepages-16384kB/surplus_hugepages
0 hugepages-16777216kB/free_hugepages
0 hugepages-16777216kB/nr_hugepages
0 hugepages-16777216kB/nr_hugepages_mempolicy
0 hugepages-16777216kB/nr_overcommit_hugepages
0 hugepages-16777216kB/resv_hugepages
0 hugepages-16777216kB/surplus_hugepages
next prev parent reply other threads:[~2016-10-14 8:48 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-13 12:19 [bug/regression] libhugetlbfs testsuite failures and OOMs eventually kill my system Jan Stancek
2016-10-13 12:19 ` Jan Stancek
2016-10-13 15:24 ` Mike Kravetz
2016-10-13 15:24 ` Mike Kravetz
2016-10-13 23:26 ` Mike Kravetz
2016-10-13 23:26 ` Mike Kravetz
2016-10-14 8:48 ` Jan Stancek [this message]
2016-10-14 8:48 ` Jan Stancek
2016-10-14 23:57 ` Mike Kravetz
2016-10-14 23:57 ` Mike Kravetz
2016-10-17 5:04 ` Aneesh Kumar K.V
2016-10-17 5:04 ` Aneesh Kumar K.V
2016-10-17 22:53 ` Mike Kravetz
2016-10-17 22:53 ` Mike Kravetz
2016-10-18 1:18 ` Mike Kravetz
2016-10-18 1:18 ` Mike Kravetz
2016-10-17 14:44 ` Jan Stancek
2016-10-17 14:44 ` Jan Stancek
2016-10-17 18:27 ` Aneesh Kumar K.V
2016-10-17 18:27 ` Aneesh Kumar K.V
2016-10-17 23:19 ` Mike Kravetz
2016-10-17 23:19 ` Mike Kravetz
2016-10-18 8:31 ` Aneesh Kumar K.V
2016-10-18 8:31 ` Aneesh Kumar K.V
2016-10-18 11:28 ` Jan Stancek
2016-10-18 11:28 ` Jan Stancek
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