Running The Bcachefs DKMS Modules On Ubuntu Linux

Written by Michael Larabel in Software on 23 September 2025 at 09:46 AM EDT. Page 3 of 4. 157 Comments.

👁 Flexible IO Tester benchmark with settings of Type: Sequential Read, Engine: IO_uring, Direct: No, Block Size: 2MB, Job Count: 32, Disk Target: Default Test Directory. XFS was the fastest.

The sequential read performance also appeared slightly lower with the new DKMS modules compared to upstream Linux 6.17. But it's also worth pointing out there was a lot more run-to-run variance in the sequential read benchmark compared to all of the other file-systems tested.

👁 Flexible IO Tester benchmark with settings of Type: Sequential Write, Engine: IO_uring, Direct: No, Block Size: 2MB, Job Count: 32, Disk Target: Default Test Directory. XFS was the fastest.

👁 Flexible IO Tester benchmark with settings of Type: Sequential Write, Engine: IO_uring, Direct: Yes, Block Size: 2MB, Job Count: 32, Disk Target: Default Test Directory. EXT4 was the fastest.

The sequential write performance also appeared to regress with the newer Bcachefs code.

👁 Dbench benchmark with settings of Client Count: 12. EXT4 was the fastest.

No real change with Dbench.

👁 ClickHouse benchmark with settings of 100M Rows Hits Dataset, First Run / Cold Cache. XFS was the fastest.

👁 ClickHouse benchmark with settings of 100M Rows Hits Dataset, Second Run. XFS was the fastest.

There was also no change observed with the ClickHouse database server.

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Running The Bcachefs DKMS Modules On Ubuntu Linux