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FreeBSD: Fix memory leaks in kstats #11767

Merged
merged 1 commit into from
Mar 18, 2021
Merged

FreeBSD: Fix memory leaks in kstats #11767

merged 1 commit into from
Mar 18, 2021
+4 −7

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ghost
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@ghost ghost commented Mar 17, 2021 •
edited by ghost
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Motivation and Context

When unloading the openzfs module after some use on FreeBSD, a message like the following could be observed in dmesg:

Warning: memory type solaris leaked memory on destroy (16 allocations, 2048 bytes leaked).

The numbers varied depending on what you were doing with ZFS.

Description

Free the data allocated for non-virtual kstats when deleting the object.

While here, eliminate some incorrect and pointless handling of kmem_zalloc returning NULL.
It won't return NULL because we used KM_SLEEP.

How Has This Been Tested?

Ran a known workload (history_001) before and after the change, observing dmesg to see the leak is gone.
Ran many iterations of ZTS on FreeBSD to verify stability.

Types of changes

  • Bug fix (non-breaking change which fixes an issue)
  • New feature (non-breaking change which adds functionality)
  • Performance enhancement (non-breaking change which improves efficiency)
  • Code cleanup (non-breaking change which makes code smaller or more readable)
  • Breaking change (fix or feature that would cause existing functionality to change)
  • Library ABI change (libzfs, libzfs_core, libnvpair, libuutil and libzfsbootenv)
  • Documentation (a change to man pages or other documentation)

Checklist:

@ghost ghost added the Status: Code Review Needed Ready for review and testing label Mar 17, 2021
@ghost ghost requested a review from amotin March 17, 2021 21:27
FreeBSD: Fix memory leaks in kstats
a184921 
Don't handle (incorrectly) kmem_zalloc() failure.  With KM_SLEEP,
will never return NULL.

Free the data allocated for non-virtual kstats when deleting the object.

Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
@ghost ghost force-pushed the testing/leaky-kstat branch from 415e1b4 to a184921 Compare March 17, 2021 22:10
@ghost
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ghost commented Mar 17, 2021

  • Removed incorrect and pointless malloc failure handling

@behlendorf behlendorf added Status: Accepted Ready to integrate (reviewed, tested) and removed Status: Code Review Needed Ready for review and testing labels Mar 18, 2021
@behlendorf behlendorf merged commit ec3e4c6 into openzfs:master Mar 18, 2021
@ghost ghost deleted the testing/leaky-kstat branch March 18, 2021 10:43
jsai20 pushed a commit to jsai20/zfs that referenced this pull request Mar 30, 2021
@jsai20
FreeBSD: Fix memory leaks in kstats
8d6d202 
Don't handle (incorrectly) kmem_zalloc() failure.  With KM_SLEEP,
will never return NULL.

Free the data allocated for non-virtual kstats when deleting the object.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes openzfs#11767
adamdmoss pushed a commit to adamdmoss/zfs that referenced this pull request Apr 10, 2021
@adamdmoss
FreeBSD: Fix memory leaks in kstats
b42720a 
Don't handle (incorrectly) kmem_zalloc() failure.  With KM_SLEEP,
will never return NULL.

Free the data allocated for non-virtual kstats when deleting the object.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes openzfs#11767
ghost pushed a commit to truenas/zfs that referenced this pull request May 6, 2021
FreeBSD: Fix memory leaks in kstats
1880799 
Don't handle (incorrectly) kmem_zalloc() failure.  With KM_SLEEP,
will never return NULL.

Free the data allocated for non-virtual kstats when deleting the object.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes openzfs#11767
ghost pushed a commit to truenas/zfs that referenced this pull request May 6, 2021
FreeBSD: Fix memory leaks in kstats
15cc429 
Don't handle (incorrectly) kmem_zalloc() failure.  With KM_SLEEP,
will never return NULL.

Free the data allocated for non-virtual kstats when deleting the object.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes openzfs#11767
ghost pushed a commit to truenas/zfs that referenced this pull request May 7, 2021
FreeBSD: Fix memory leaks in kstats
1fe3892 
Don't handle (incorrectly) kmem_zalloc() failure.  With KM_SLEEP,
will never return NULL.

Free the data allocated for non-virtual kstats when deleting the object.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes openzfs#11767
ghost pushed a commit to truenas/zfs that referenced this pull request May 10, 2021
FreeBSD: Fix memory leaks in kstats
827f649 
Don't handle (incorrectly) kmem_zalloc() failure.  With KM_SLEEP,
will never return NULL.

Free the data allocated for non-virtual kstats when deleting the object.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes openzfs#11767
ghost pushed a commit to truenas/zfs that referenced this pull request May 10, 2021
FreeBSD: Fix memory leaks in kstats
534344b 
Don't handle (incorrectly) kmem_zalloc() failure.  With KM_SLEEP,
will never return NULL.

Free the data allocated for non-virtual kstats when deleting the object.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes openzfs#11767
ghost pushed a commit to truenas/zfs that referenced this pull request May 10, 2021
FreeBSD: Fix memory leaks in kstats
946734f 
Don't handle (incorrectly) kmem_zalloc() failure.  With KM_SLEEP,
will never return NULL.

Free the data allocated for non-virtual kstats when deleting the object.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes openzfs#11767
ghost pushed a commit to truenas/zfs that referenced this pull request May 13, 2021
FreeBSD: Fix memory leaks in kstats
fce7cb2 
Don't handle (incorrectly) kmem_zalloc() failure.  With KM_SLEEP,
will never return NULL.

Free the data allocated for non-virtual kstats when deleting the object.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes openzfs#11767
behlendorf pushed a commit that referenced this pull request May 20, 2021
@behlendorf
FreeBSD: Fix memory leaks in kstats
911a095 
Don't handle (incorrectly) kmem_zalloc() failure.  With KM_SLEEP,
will never return NULL.

Free the data allocated for non-virtual kstats when deleting the object.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes #11767
sempervictus pushed a commit to sempervictus/zfs that referenced this pull request May 31, 2021
FreeBSD: Fix memory leaks in kstats
9dafa3d 
Don't handle (incorrectly) kmem_zalloc() failure.  With KM_SLEEP,
will never return NULL.

Free the data allocated for non-virtual kstats when deleting the object.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes openzfs#11767
tonyhutter pushed a commit that referenced this pull request Jun 23, 2021
@tonyhutter
FreeBSD: Fix memory leaks in kstats
825d8e1 
Don't handle (incorrectly) kmem_zalloc() failure.  With KM_SLEEP,
will never return NULL.

Free the data allocated for non-virtual kstats when deleting the object.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Ryan Moeller <ryan@iXsystems.com>
Closes #11767
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@behlendorf @amotin