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EXT4 File-System Updated For Linux 3.11 Kernel

Linux Kernel

Published on 02 July 2013 10:38 PM EDT
Written by Michael Larabel in Linux Kernel
8 Comments

Ted Ts'o has already sent in his pull request for EXT4 file-system changes targeting the Linux 3.11 kernel.

There isn't too much fun about the Linux 3.11 EXT4 changes for this mature and widely-used Linux file-system, but there is some performance tuning. Ts'o notes, "In the optimizations category, two major optimizations deserve mention. The first is that ext4_writepages() is now used for nodelalloc and ext3 compatibility mode. This allows writes to be submitted much more efficiently as a single bio request, instead of being sent as individual 4k writes into the block layer (which then relied on the elevator code to coalesce the requests in the block queue). Secondly, the extent cache shrink mechanism, which was introduce in 3.9, no longer has a scalability bottleneck caused by the i_es_lru spinlock. Other optimizations include some changes to reduce CPU usage and to avoid issuing empty commits unnecessarily."

Other work includes bug-fixes and code clean-ups for the EXT4 file-system in Linux 3.11 The pull request can be viewed on the mailing list.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
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