Make txg_wait_synced conditional in zfsvfs_teardown #9115
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ahrens
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Status: Code Review Needed
ahrens
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Aug 5, 2019
| for (int t = 0; t < TXG_SIZE; t++) { | ||
| os_dirty = dmu_objset_is_dirty(os, t); | ||
| if (os_dirty) | ||
| break; |
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[nit] I think this would be slightly easier to read as:
if (dmu_objset_is_dirty(...)) {
os_dirty = B_TRUE;
break;
}
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Thanks Matt I made that change.
The call to txg_wait_synced in zfsvfs_teardown should be made conditional on the objset having dirty data. This can prevent unnecessary txg_wait_synced during some unmount operations. Signed-off-by: Paul Zuchowski <pzuchowski@datto.com>
Codecov Report
@@ Coverage Diff @@
## master #9115 +/- ##
==========================================
+ Coverage 79.18% 79.21% +0.02%
==========================================
Files 400 400
Lines 121692 121656 -36
==========================================
+ Hits 96360 96367 +7
+ Misses 25332 25289 -43
Continue to review full report at Codecov.
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behlendorf
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Aug 12, 2019
behlendorf
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Status: Accepted
tonyhutter
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Dec 24, 2019
The call to txg_wait_synced in zfsvfs_teardown should be made conditional on the objset having dirty data. This can prevent unnecessary txg_wait_synced during some unmount operations. Reviewed-by: Matt Ahrens <matt@delphix.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Paul Zuchowski <pzuchowski@datto.com> Closes openzfs#9115
tonyhutter
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Dec 27, 2019
The call to txg_wait_synced in zfsvfs_teardown should be made conditional on the objset having dirty data. This can prevent unnecessary txg_wait_synced during some unmount operations. Reviewed-by: Matt Ahrens <matt@delphix.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Paul Zuchowski <pzuchowski@datto.com> Closes openzfs#9115
tonyhutter
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Jan 23, 2020
The call to txg_wait_synced in zfsvfs_teardown should be made conditional on the objset having dirty data. This can prevent unnecessary txg_wait_synced during some unmount operations. Reviewed-by: Matt Ahrens <matt@delphix.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Paul Zuchowski <pzuchowski@datto.com> Closes #9115
allanjude
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Apr 28, 2020
The call to txg_wait_synced in zfsvfs_teardown should be made conditional on the objset having dirty data. This can prevent unnecessary txg_wait_synced during some unmount operations. Reviewed-by: Matt Ahrens <matt@delphix.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Paul Zuchowski <pzuchowski@datto.com> Closes openzfs#9115 Signed-off-by: Bryant G. Ly <bly@catalogicsoftware.com> Conflicts: module/zfs/zfs_vfsops.c
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The call to txg_wait_synced in zfsvfs_teardown should
be made conditional on the objset having dirty data.
This can prevent unnecessary txg_wait_synced during
some unmount operations.
Signed-off-by: Paul Zuchowski pzuchowski@datto.com
The function zfsvfs_teardown only skips txg_wait_synced if the objset is read-only. We can also avoid txg_wait_synced if the objset has no dirty data. Detect if the objset is dirty and don't call txg_wait_synced if it is not.
Motivation and Context
Applications that perform lots of sync tasks are already forcing txg_wait_synced. If the application also limits ZFS mounts by unmounting datasets after use, it could be helpful to performance to avoid txg_wait_synced during unmount when we can.
Description
Add to the conditional test for txg_wait_synced in zfsvfs_teardown.
How Has This Been Tested?
Ran the zfs test suite.
Types of changes
Checklist:
Signed-off-by.