More File-System Tests Of The Linux 3.18 Kernel
Written by Michael Larabel in Linux Kernel on 22 November 2014 at 09:14 AM EST. 14 Comments
Earlier this week on Phoronix I posted benchmarks indicating potential block/file-system performance regressions using the Linux 3.18 kernel. Since then I've been carrying out more tests looking for any file-system performance problems on other hardware.

The tests earlier this week showed the Flexible I/O Tester (FIO) regressing for EXT4/Btrfs/XFS/F2FS from a OCZ Vertex 3 SATA SSD with Intel Core i7 5960X Haswell-E system. I've been running a few more Linux 3.17 vs. Linux 3.18 Git comparisons looking at the disk performance for other Linux systems:

1411196-LI-LINUX318D62 - An Intel Core i7 4770K system with 120GB Intel SSD. For these tests there was minimal change in performance between Linux 3.17 and 3.18 -- if anything some of the results were a tiny bit better on Linux 3.18.

1411189-LI-FSLINUX3180 - An old Lenovo ThinkPad with Intel Core i7 720QM CPU with 160GB Fujitsu HDD. EXT4 regressed in the FIO tests for this system on the Linux 3.18 kernel compared to Linux 3.17.0 stable. However, the other file-systems were largely unchanged.

The investigation is still ongoing along with other Linux 3.18 benchmarks; stay tuned to Phoronix.
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Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter or contacted via

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