Reiser4 File-System SSD "Discard" Support Gets Revised
Written by Michael Larabel in Free Software on 19 June 2014 at 03:47 AM EDT. Add A Comment
Ivan Shapovalov is back on track with his Reiser4 file-system contributions.

Shapovalov has been working on Reiser4 support for TRIM/Discard on SSDs. It's been some weeks since the last revision but the fourth version of the patches are now out there for this common file-system feature of being able to discard blocks by informing the solid-state drive about blocks that are no longer in use by the file-system. Most mainline Linux file-systems already support SSD discard, which is generally exposed via the discard mount option -- which is also the case for Reiser4.

The new Reiser4 discard patches can be found on the ReiserFS mailing list and hopefully will make it into the next Reiser4 file-system revision when the out-of-tree code is update for the Linux 3.15/3.16 kernel compatibility.

My most recent Reiser4 Linux benchmarks are from last summer so within the next major kernel revision or two I'll try to get out a fresh file-system comparison incorporating ZFS, Reiser4, and the usual mainline candidates we frequently cover on Phoronix.

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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 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 OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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