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Test case create-o_ashift #6924

Closed
behlendorf opened this issue Dec 5, 2017 · 0 comments · Fixed by #6977
Closed

Test case create-o_ashift #6924

behlendorf opened this issue Dec 5, 2017 · 0 comments · Fixed by #6977
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Component: Test Suite Indicates an issue with the test framework or a test case

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@behlendorf
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behlendorf commented Dec 5, 2017 •
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System information

Type Version/Name
Distribution Name all
Distribution Version all
Linux Kernel all
Architecture all
ZFS Version zfs-0.7.0-205-g1ce23dc
SPL Version 0.7

Describe the problem you're observing

Occasionally observed failure of create-o_ashift during automated testing. This is caused by a problem with the test case which needs to be resolved before this test case can be re-enabed.

Describe how to reproduce the problem

Reproducible by the buildbot.

Include any warning/errors/backtraces from the system logs

http://build.zfsonlinux.org/builders/Ubuntu%2014.04%20i686%20%28TEST%29/builds/4971/steps/shell_8/logs/log

Test: /usr/share/zfs/zfs-tests/tests/functional/cli_root/zpool_create/create-o_ashift (run as root) [00:40] [FAIL]
22:07:56.81 ASSERTION: zpool create -o ashift=<n>' works with different ashift values
22:08:08.80 SUCCESS: mkfile 256m /mnt/filedisk0_create
22:08:09.74 SUCCESS: zpool create -o ashift=9 testpool /mnt/filedisk0_create
22:08:10.29 SUCCESS: zpool sync -f testpool
22:08:10.30 SUCCESS: sync_pool testpool true
...
22:08:10.66 SUCCESS: zpool sync -f testpool
22:08:36.39 SUCCESS: sync_pool testpool true
22:08:36.49 Pool was created with unexpected number of uberblocks`
@behlendorf behlendorf added the Component: Test Suite Indicates an issue with the test framework or a test case label Dec 5, 2017
behlendorf added a commit to behlendorf/zfs that referenced this issue Dec 5, 2017
@behlendorf
Disable create-o_ashift
64141cc 
Occasionally observed failure of create-o_ashift due to the test
case not being 100% reliable.  In order to prevent false positives
disable this test case until it can be made reliable.

Signed-off-by: Brian Behlendorf <[email protected]>
Issue openzfs#6924
@behlendorf behlendorf mentioned this issue Dec 5, 2017
Merged
13 tasks
behlendorf added a commit that referenced this issue Dec 6, 2017
@behlendorf
Disable create-o_ashift
0c415a9 
Occasionally observed failure of create-o_ashift due to the test
case not being 100% reliable.  In order to prevent false positives
disable this test case until it can be made reliable.

Reviewed-by: George Melikov <[email protected]>
Reviewed-by: Giuseppe Di Natale <[email protected]>
Reviewed-by: loli10K <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Issue #6924
Closes #6925
@loli10K loli10K self-assigned this Dec 17, 2017
@loli10K loli10K mentioned this issue Dec 17, 2017
Merged
13 tasks
behlendorf pushed a commit that referenced this issue Dec 19, 2017
@loli10K @behlendorf
ZTS: Fix create-o_ashift test case
c30e34f 
The function that fills the uberblock ring buffer on every device label
has been reworked to avoid occasional failures caused by a race
condition that prevents 'zpool sync' from writing some uberblock
sequentially: this happens when the pool sync ioctl dispatch code calls
txg_wait_synced() while we're already waiting for a TXG to sync.

Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: loli10K <[email protected]>
Closes #6924 
Closes #6977
Nasf-Fan pushed a commit to Nasf-Fan/zfs that referenced this issue Jan 29, 2018
@behlendorf @Nasf-Fan
Disable create-o_ashift
827ea35 
Occasionally observed failure of create-o_ashift due to the test
case not being 100% reliable.  In order to prevent false positives
disable this test case until it can be made reliable.

Reviewed-by: George Melikov <[email protected]>
Reviewed-by: Giuseppe Di Natale <[email protected]>
Reviewed-by: loli10K <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Issue openzfs#6924
Closes openzfs#6925
Nasf-Fan pushed a commit to Nasf-Fan/zfs that referenced this issue Jan 29, 2018
@loli10K @Nasf-Fan
ZTS: Fix create-o_ashift test case
a6e7fdb 
The function that fills the uberblock ring buffer on every device label
has been reworked to avoid occasional failures caused by a race
condition that prevents 'zpool sync' from writing some uberblock
sequentially: this happens when the pool sync ioctl dispatch code calls
txg_wait_synced() while we're already waiting for a TXG to sync.

Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: loli10K <[email protected]>
Closes openzfs#6924
Closes openzfs#6977
Nasf-Fan pushed a commit to Nasf-Fan/zfs that referenced this issue Feb 13, 2018
@behlendorf @Nasf-Fan
Disable create-o_ashift
6246cbc 
Occasionally observed failure of create-o_ashift due to the test
case not being 100% reliable.  In order to prevent false positives
disable this test case until it can be made reliable.

Reviewed-by: George Melikov <[email protected]>
Reviewed-by: Giuseppe Di Natale <[email protected]>
Reviewed-by: loli10K <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Issue openzfs#6924
Closes openzfs#6925
Nasf-Fan pushed a commit to Nasf-Fan/zfs that referenced this issue Feb 13, 2018
@loli10K @Nasf-Fan
ZTS: Fix create-o_ashift test case
c101204 
The function that fills the uberblock ring buffer on every device label
has been reworked to avoid occasional failures caused by a race
condition that prevents 'zpool sync' from writing some uberblock
sequentially: this happens when the pool sync ioctl dispatch code calls
txg_wait_synced() while we're already waiting for a TXG to sync.

Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: loli10K <[email protected]>
Closes openzfs#6924
Closes openzfs#6977
tonyhutter pushed a commit to tonyhutter/zfs that referenced this issue Mar 7, 2018
@loli10K @tonyhutter
ZTS: Fix create-o_ashift test case
5359c06 
The function that fills the uberblock ring buffer on every device label
has been reworked to avoid occasional failures caused by a race
condition that prevents 'zpool sync' from writing some uberblock
sequentially: this happens when the pool sync ioctl dispatch code calls
txg_wait_synced() while we're already waiting for a TXG to sync.

Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: loli10K <[email protected]>
Closes openzfs#6924 
Closes openzfs#6977
tonyhutter pushed a commit to tonyhutter/zfs that referenced this issue Mar 7, 2018
@ryao @tonyhutter
zfs-0.7.7 squashed patchset
3c93490 
This is a squashed patchset for zfs-0.7.7.  The individual commits are
in the tonyhutter:zfs-0.7.7-hutter branch.  I squashed the commits so
that buildbot wouldn't have to run against each one, and because
github/builbot seem to have a maximum limit of 30 commits they can
test from a PR.

- Linux 4.16 compat: get_disk_and_module() openzfs#7264
- Change checksum & IO delay ratelimit values openzfs#7252
- Increment zil_itx_needcopy_bytes properly openzfs#6988  openzfs#7176
- Fix some typos openzfs#7237
- Fix zpool(8) list example to match actual format openzfs#7244
- Add SMART self-test results to zpool status -c openzfs#7178
- Add scrub after resilver zed script openzfs#4662  openzfs#7086
- Fix free memory calculation on v3.14+ openzfs#7170
- Report duration and error in mmp_history entries openzfs#7190
- Do not initiate MMP writes while pool is suspended openzfs#7182
- Linux 4.16 compat: use correct *_dec_and_test() openzfs#7179  openzfs#7211
- Allow modprobe to fail when called within systemd openzfs#7174
- Add SMART attributes for SSD and NVMe openzfs#7183  openzfs#7193
- Correct count_uberblocks in mmp.kshlib openzfs#7191
- Fix config issues: frame size and headers openzfs#7169
- Clarify zinject(8) explanation of -e openzfs#7172
- OpenZFS 8857 - zio_remove_child() panic due to already destroyed
  parent zio openzfs#7168
- 'zfs receive' fails with "dataset is busy" openzfs#7129  openzfs#7154
- contrib/initramfs: add missing conf.d/zfs openzfs#7158
- mmp should use a fixed tag for spa_config locks openzfs#6530  openzfs#7155
- Handle zap_add() failures in mixed case mode openzfs#7011 openzfs#7054
- Fix zdb -ed on objset for exported pool openzfs#7099 openzfs#6464
- Fix zdb -E segfault openzfs#7099
- Fix zdb -R decompression openzfs#7099  openzfs#4984
- Fix racy assignment of zcb.zcb_haderrors openzfs#7099
- Fix zle_decompress out of bound access openzfs#7099
- Fix zdb -c traverse stop on damaged objset root openzfs#7099
- Linux 4.11 compat: avoid refcount_t name conflict openzfs#7148
- Linux 4.16 compat: inode_set_iversion() openzfs#7148
- OpenZFS 8966 - Source file zfs_acl.c, function zfs_aclset_common
  contains a use after end of the lifetime of a local variable openzfs#7141
- Remove deprecated zfs_arc_p_aggressive_disable openzfs#7135
- Fix default libdir for Debian/Ubuntu openzfs#7083  openzfs#7101
- Bug fix in qat_compress.c for vmalloc addr check openzfs#7125
- Fix systemd_ RPM macros usage on Debian-based distributions openzfs#7074
  openzfs#7100
- Emit an error message before MMP suspends pool openzfs#7048
- ZTS: Fix create-o_ashift test case openzfs#6924  openzfs#6977
- Fix --with-systemd on Debian-based distributions (openzfs#6963) openzfs#6591  openzfs#6963
- Remove vn_rename and vn_remove dependency openzfs/spl#648 openzfs#6753
- Add support for "--enable-code-coverage" option openzfs#6670
- Make "-fno-inline" compile option more accessible openzfs#6605
- Add configure option to enable gcov analysis openzfs#6642
- Implement --enable-debuginfo to force debuginfo openzfs#2734
- Make --enable-debug fail when given bogus args openzfs#2734

Signed-off-by: Tony Hutter <[email protected]>
Requires-spl: refs/pull/690/head
@tonyhutter tonyhutter mentioned this issue Mar 7, 2018
Closed
13 tasks
tonyhutter pushed a commit to tonyhutter/zfs that referenced this issue Mar 12, 2018
@loli10K @tonyhutter
ZTS: Fix create-o_ashift test case
6d054f0 
The function that fills the uberblock ring buffer on every device label
has been reworked to avoid occasional failures caused by a race
condition that prevents 'zpool sync' from writing some uberblock
sequentially: this happens when the pool sync ioctl dispatch code calls
txg_wait_synced() while we're already waiting for a TXG to sync.

Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: loli10K <[email protected]>
Closes openzfs#6924 
Closes openzfs#6977
tonyhutter pushed a commit to tonyhutter/zfs that referenced this issue Mar 13, 2018
@ryao @tonyhutter
zfs-0.7.7 squashed patchset
7852832 
This is a squashed patchset for zfs-0.7.7.  The individual commits are
in the tonyhutter:zfs-0.7.7-hutter branch.  I squashed the commits so
that buildbot wouldn't have to run against each one, and because
github/builbot seem to have a maximum limit of 30 commits they can
test from a PR.

- Fix MMP write frequency for large pools openzfs#7205 openzfs#7289
- Handle zio_resume and mmp => off openzfs#7286
- Fix zfs-kmod builds when using rpm >= 4.14 openzfs#7284
- zdb and inuse tests don't pass with real disks openzfs#6939 openzfs#7261
- Take user namespaces into account in policy checks openzfs#6800 openzfs#7270
- Detect long config lock acquisition in mmp openzfs#7212
- Linux 4.16 compat: get_disk_and_module() openzfs#7264
- Change checksum & IO delay ratelimit values openzfs#7252
- Increment zil_itx_needcopy_bytes properly openzfs#6988 openzfs#7176
- Fix some typos openzfs#7237
- Fix zpool(8) list example to match actual format openzfs#7244
- Add SMART self-test results to zpool status -c openzfs#7178
- Add scrub after resilver zed script openzfs#4662 openzfs#7086
- Fix free memory calculation on v3.14+ openzfs#7170
- Report duration and error in mmp_history entries openzfs#7190
- Do not initiate MMP writes while pool is suspended openzfs#7182
- Linux 4.16 compat: use correct *_dec_and_test()
- Allow modprobe to fail when called within systemd openzfs#7174
- Add SMART attributes for SSD and NVMe openzfs#7183 openzfs#7193
- Correct count_uberblocks in mmp.kshlib openzfs#7191
- Fix config issues: frame size and headers openzfs#7169
- Clarify zinject(8) explanation of -e openzfs#7172
- OpenZFS 8857 - zio_remove_child() panic due to already destroyed parent zio openzfs#7168
- 'zfs receive' fails with "dataset is busy" openzfs#7129 openzfs#7154
- contrib/initramfs: add missing conf.d/zfs openzfs#7158
- mmp should use a fixed tag for spa_config locks openzfs#6530 openzfs#7155
- Handle zap_add() failures in mixed case mode openzfs#7011 openzfs#7054
- Fix zdb -ed on objset for exported pool openzfs#7099 openzfs#6464
- Fix zdb -E segfault openzfs#7099
- Fix zdb -R decompression openzfs#7099 openzfs#4984
- Fix racy assignment of zcb.zcb_haderrors openzfs#7099
- Fix zle_decompress out of bound access openzfs#7099
- Fix zdb -c traverse stop on damaged objset root openzfs#7099
- Linux 4.11 compat: avoid refcount_t name conflict openzfs#7148
- Linux 4.16 compat: inode_set_iversion() openzfs#7148
- OpenZFS 8966 - Source file zfs_acl.c, function zfs_aclset_common contains a use after end of the lifetime of a local variable openzfs#7141
- Remove deprecated zfs_arc_p_aggressive_disable openzfs#7135
- Fix default libdir for Debian/Ubuntu openzfs#7083 openzfs#7101
- Bug fix in qat_compress.c for vmalloc addr check openzfs#7125
- Fix systemd_ RPM macros usage on Debian-based distributions openzfs#7074 openzfs#7100
- Emit an error message before MMP suspends pool openzfs#7048
- ZTS: Fix create-o_ashift test case openzfs#6924 openzfs#6977
- Fix --with-systemd on Debian-based distributions (openzfs#6963) openzfs#6591 openzfs#6963
- Remove vn_rename and vn_remove dependency openzfs/spl#648 openzfs#6753
- Add support for "--enable-code-coverage" option openzfs#6670
- Make "-fno-inline" compile option more accessible openzfs#6605
- Add configure option to enable gcov analysis openzfs#6642
- Implement --enable-debuginfo to force debuginfo openzfs#2734
- Make --enable-debug fail when given bogus args openzfs#2734

Signed-off-by: Tony Hutter <[email protected]>
Requires-spl: refs/pull/690/head
tonyhutter pushed a commit to tonyhutter/zfs that referenced this issue Mar 13, 2018
@ryao @tonyhutter
zfs-0.7.7 squashed patchset
6e7b286 
This is a squashed patchset for zfs-0.7.7.  The individual commits are
in the tonyhutter:zfs-0.7.7-hutter branch.  I squashed the commits so
that buildbot wouldn't have to run against each one, and because
github/builbot seem to have a maximum limit of 30 commits they can
test from a PR.

- Fix MMP write frequency for large pools openzfs#7205 openzfs#7289
- Handle zio_resume and mmp => off openzfs#7286
- Fix zfs-kmod builds when using rpm >= 4.14 openzfs#7284
- zdb and inuse tests don't pass with real disks openzfs#6939 openzfs#7261
- Take user namespaces into account in policy checks openzfs#6800 openzfs#7270
- Detect long config lock acquisition in mmp openzfs#7212
- Linux 4.16 compat: get_disk_and_module() openzfs#7264
- Change checksum & IO delay ratelimit values openzfs#7252
- Increment zil_itx_needcopy_bytes properly openzfs#6988 openzfs#7176
- Fix some typos openzfs#7237
- Fix zpool(8) list example to match actual format openzfs#7244
- Add SMART self-test results to zpool status -c openzfs#7178
- Add scrub after resilver zed script openzfs#4662 openzfs#7086
- Fix free memory calculation on v3.14+ openzfs#7170
- Report duration and error in mmp_history entries openzfs#7190
- Do not initiate MMP writes while pool is suspended openzfs#7182
- Linux 4.16 compat: use correct *_dec_and_test()
- Allow modprobe to fail when called within systemd openzfs#7174
- Add SMART attributes for SSD and NVMe openzfs#7183 openzfs#7193
- Correct count_uberblocks in mmp.kshlib openzfs#7191
- Fix config issues: frame size and headers openzfs#7169
- Clarify zinject(8) explanation of -e openzfs#7172
- OpenZFS 8857 - zio_remove_child() panic due to already destroyed
  parent zio openzfs#7168
- 'zfs receive' fails with "dataset is busy" openzfs#7129 openzfs#7154
- contrib/initramfs: add missing conf.d/zfs openzfs#7158
- mmp should use a fixed tag for spa_config locks openzfs#6530 openzfs#7155
- Handle zap_add() failures in mixed case mode openzfs#7011 openzfs#7054
- Fix zdb -ed on objset for exported pool openzfs#7099 openzfs#6464
- Fix zdb -E segfault openzfs#7099
- Fix zdb -R decompression openzfs#7099 openzfs#4984
- Fix racy assignment of zcb.zcb_haderrors openzfs#7099
- Fix zle_decompress out of bound access openzfs#7099
- Fix zdb -c traverse stop on damaged objset root openzfs#7099
- Linux 4.11 compat: avoid refcount_t name conflict openzfs#7148
- Linux 4.16 compat: inode_set_iversion() openzfs#7148
- OpenZFS 8966 - Source file zfs_acl.c, function zfs_aclset_common
  contains a use after end of the lifetime of a local variable openzfs#7141
- Remove deprecated zfs_arc_p_aggressive_disable openzfs#7135
- Fix default libdir for Debian/Ubuntu openzfs#7083 openzfs#7101
- Bug fix in qat_compress.c for vmalloc addr check openzfs#7125
- Fix systemd_ RPM macros usage on Debian-based distributions openzfs#7074
  openzfs#7100
- Emit an error message before MMP suspends pool openzfs#7048
- ZTS: Fix create-o_ashift test case openzfs#6924 openzfs#6977
- Fix --with-systemd on Debian-based distributions (openzfs#6963) openzfs#6591 openzfs#6963
- Remove vn_rename and vn_remove dependency openzfs/spl#648 openzfs#6753
- Add support for "--enable-code-coverage" option openzfs#6670
- Make "-fno-inline" compile option more accessible openzfs#6605
- Add configure option to enable gcov analysis openzfs#6642
- Implement --enable-debuginfo to force debuginfo openzfs#2734
- Make --enable-debug fail when given bogus args openzfs#2734

Signed-off-by: Tony Hutter <[email protected]>
Requires-spl: refs/pull/690/head
tonyhutter pushed a commit to tonyhutter/zfs that referenced this issue Mar 13, 2018
@loli10K @tonyhutter
ZTS: Fix create-o_ashift test case
8b01141 
The function that fills the uberblock ring buffer on every device label
has been reworked to avoid occasional failures caused by a race
condition that prevents 'zpool sync' from writing some uberblock
sequentially: this happens when the pool sync ioctl dispatch code calls
txg_wait_synced() while we're already waiting for a TXG to sync.

Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: loli10K <[email protected]>
Closes openzfs#6924 
Closes openzfs#6977
tonyhutter pushed a commit to tonyhutter/zfs that referenced this issue Mar 13, 2018
@ryao @tonyhutter
zfs-0.7.7 squashed patchset
fe5d27a 
This is a squashed patchset for zfs-0.7.7.  The individual commits are
in the tonyhutter:zfs-0.7.7-hutter branch.  I squashed the commits so
that buildbot wouldn't have to run against each one, and because
github/builbot seem to have a maximum limit of 30 commits they can
test from a PR.

- Fix MMP write frequency for large pools openzfs#7205 openzfs#7289
- Handle zio_resume and mmp => off openzfs#7286
- Fix zfs-kmod builds when using rpm >= 4.14 openzfs#7284
- zdb and inuse tests don't pass with real disks openzfs#6939 openzfs#7261
- Take user namespaces into account in policy checks openzfs#6800 openzfs#7270
- Detect long config lock acquisition in mmp openzfs#7212
- Linux 4.16 compat: get_disk_and_module() openzfs#7264
- Change checksum & IO delay ratelimit values openzfs#7252
- Increment zil_itx_needcopy_bytes properly openzfs#6988 openzfs#7176
- Fix some typos openzfs#7237
- Fix zpool(8) list example to match actual format openzfs#7244
- Add SMART self-test results to zpool status -c openzfs#7178
- Add scrub after resilver zed script openzfs#4662 openzfs#7086
- Fix free memory calculation on v3.14+ openzfs#7170
- Report duration and error in mmp_history entries openzfs#7190
- Do not initiate MMP writes while pool is suspended openzfs#7182
- Linux 4.16 compat: use correct *_dec_and_test()
- Allow modprobe to fail when called within systemd openzfs#7174
- Add SMART attributes for SSD and NVMe openzfs#7183 openzfs#7193
- Correct count_uberblocks in mmp.kshlib openzfs#7191
- Fix config issues: frame size and headers openzfs#7169
- Clarify zinject(8) explanation of -e openzfs#7172
- OpenZFS 8857 - zio_remove_child() panic due to already destroyed
  parent zio openzfs#7168
- 'zfs receive' fails with "dataset is busy" openzfs#7129 openzfs#7154
- contrib/initramfs: add missing conf.d/zfs openzfs#7158
- mmp should use a fixed tag for spa_config locks openzfs#6530 openzfs#7155
- Handle zap_add() failures in mixed case mode openzfs#7011 openzfs#7054
- Fix zdb -ed on objset for exported pool openzfs#7099 openzfs#6464
- Fix zdb -E segfault openzfs#7099
- Fix zdb -R decompression openzfs#7099 openzfs#4984
- Fix racy assignment of zcb.zcb_haderrors openzfs#7099
- Fix zle_decompress out of bound access openzfs#7099
- Fix zdb -c traverse stop on damaged objset root openzfs#7099
- Linux 4.11 compat: avoid refcount_t name conflict openzfs#7148
- Linux 4.16 compat: inode_set_iversion() openzfs#7148
- OpenZFS 8966 - Source file zfs_acl.c, function zfs_aclset_common
  contains a use after end of the lifetime of a local variable openzfs#7141
- Remove deprecated zfs_arc_p_aggressive_disable openzfs#7135
- Fix default libdir for Debian/Ubuntu openzfs#7083 openzfs#7101
- Bug fix in qat_compress.c for vmalloc addr check openzfs#7125
- Fix systemd_ RPM macros usage on Debian-based distributions openzfs#7074
  openzfs#7100
- Emit an error message before MMP suspends pool openzfs#7048
- ZTS: Fix create-o_ashift test case openzfs#6924 openzfs#6977
- Fix --with-systemd on Debian-based distributions (openzfs#6963) openzfs#6591 openzfs#6963
- Remove vn_rename and vn_remove dependency openzfs/spl#648 openzfs#6753
- Fix "--enable-code-coverage" debug build openzfs#6674
- Update codecov.yml openzfs#6669
- Add support for "--enable-code-coverage" option openzfs#6670
- Make "-fno-inline" compile option more accessible openzfs#6605
- Add configure option to enable gcov analysis openzfs#6642
- Implement --enable-debuginfo to force debuginfo openzfs#2734
- Make --enable-debug fail when given bogus args openzfs#2734

Signed-off-by: Tony Hutter <[email protected]>
Requires-spl: refs/pull/690/head
tonyhutter pushed a commit that referenced this issue Mar 19, 2018
@loli10K @tonyhutter
ZTS: Fix create-o_ashift test case
6c891ad 
The function that fills the uberblock ring buffer on every device label
has been reworked to avoid occasional failures caused by a race
condition that prevents 'zpool sync' from writing some uberblock
sequentially: this happens when the pool sync ioctl dispatch code calls
txg_wait_synced() while we're already waiting for a TXG to sync.

Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: loli10K <[email protected]>
Closes #6924
Closes #6977
FransUrbo pushed a commit to FransUrbo/zfs that referenced this issue Apr 28, 2019
@behlendorf @FransUrbo
Disable create-o_ashift
ce5d872 
Occasionally observed failure of create-o_ashift due to the test
case not being 100% reliable.  In order to prevent false positives
disable this test case until it can be made reliable.

Reviewed-by: George Melikov <[email protected]>
Reviewed-by: Giuseppe Di Natale <[email protected]>
Reviewed-by: loli10K <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Issue openzfs#6924
Closes openzfs#6925
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ZTS: Fix create-o_ashift test case loli10K/zfs
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@behlendorf @loli10K