Bug 1287133 - Abysmal SSD performance on SSD and all 4.2 kernels
Abysmal SSD performance on SSD and all 4.2 kernels
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
i686 Linux
unspecified Severity medium
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Assigned To: Kernel Maintainer List
Fedora Extras Quality Assurance
Depends On:
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Reported: 2015-12-01 10:03 EST by Frank Sweetser
Modified: 2016-07-19 15:59 EDT (History)
6 users (show)

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Doc Type: Bug Fix
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Last Closed: 2016-07-19 15:59:43 EDT
Type: Bug
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Description Frank Sweetser 2015-12-01 10:03:18 EST
Description of problem:

I'm running a Dell Optiplex 9010, with dual Samsung 840 Pro SSDs in software RAID 1.  When I first boot up, everything is running as normal.  However, within 15 to 20 minutes, all read and write performance to my drives drops to barely functioning levels.  My IO monitors (I have kgrellm running) initially show throughput typically maxing out around 280MB/s, but they eventually drop to no more than 5MB/s.

I haven't been able to wait long enough for a bonnie++ run to complete and get hard data.

Version-Release number of selected component (if applicable):

Extreme slowdown is reliably observed on my system in all 4.2 kernels.

How reproducible:


Steps to Reproduce:

Just boot a 4.2 kernel, and wait.

I'll be more than happy to try any troubleshooting steps that might either fix a problem with my setup, or shed more light on what the underlying cause might be.

Comment 1 Fedora End Of Life 2016-07-19 15:59:43 EDT
Fedora 22 changed to end-of-life (EOL) status on 2016-07-19. Fedora 22 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of
Fedora please feel free to reopen this bug against that version. If you
are unable to reopen this bug, please file a new report against the
current release. If you experience problems, please add a comment to this

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