Linux 4.1

As you may have already known the headline features in this release include support for encrypted ext4 filesystems, the persistent memory block driver and the ACPI support for the ARM64 architecture.
This 4.1 release will also be a LTS release, but there is more…
If you are an owner of certain classes of Intel hardware (Intel Core i7 5960X Haswell-E CPU and Iris Graphics) you could notice better performance under this new kernel and in some cases, better battery life.
The newly-published patches for ext4 encryption support are coming out of Google and intended to land in the next major release of Android.
The block core improvements were focused on improving the multi-queue block layer (blk-mq). This code was added to Linux 3.13 and can lead to better disk performance with lower latencies by balancing the I/O workload across multiple CPU cores and also supporting multiple hardware queues. Since Linux 3.13, blk-mq has got into great shape and is delivering great performance.
After months of work the Intel-developed PMEM, the simple persistent-memory driver, has been merged improving the kernel’s support for large, non-volatile RAM devices. PMEM is a new block device driver for persistent non-volatile memory space that is mapped to the system’s physical memory space as large physical memory regions.
The ACPI work on ARM64 architecture allows for initializing CPUs, interrupt controller, and timers via ACPI tables while the memory information and rest are passed via EFI.
There has been a lot of other improvements and for more details have a look at the full changelog.

This entry was posted on Sunday, June 28th, 2015 at 10:10 PM and is filed under linux.

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