#pragma section-numbers on
#pragma keywords Linux, kernel, operating system, changes, changelog, file system, Linus Torvalds, open source, device drivers
#pragma description Summary of the changes and new features merged in the Linux kernel during the 3.15 development cycle

Linux 3.15 [https://lkml.org/lkml/2014/6/8/70 has been released] on Sun, 8 Jun

/!\ /!\ This page is not complete /!\ /!\

While the page is completed, you can read about Linux 3.15 in the following sites:
 * LWN Merge window, [http://lwn.net/Articles/592989/ part 1] and [http://lwn.net/Articles/594864/ part 2]


= Prominent features =
== Faster resume from power suspend in systems with hard disks ==

Resuming a system from suspend used to take a long time in systems with traditional hard disks, because the system blocks the resume process until the hard disk finish powering up. In this release, commands are sent to the hard disk asynchronously, so the entire resuming process isn't paused by the hard disk. The end result is that systems with hard disks will resume several seconds faster with this Linux release.

For more details, see this [https://01.org/suspendresume/blogs/tebrandt/2013/hard-disk-resume-optimization-simpler-approach blog entry]

Code:  [http://git.kernel.org/linus/;a=commit;h=200421a80f6e0a9e39d698944cc35cba103eb6ce commit 1], [http://git.kernel.org/linus/;a=commit;h=3c31b52f96f7b559d950b16113c0f68c72a1985e 2]

== EFI 64 bit kernels can be booted from 32 bit firmware ==
Most modern x86 CPUs are 64bit, but many modern systems ship with a 32 bit EFI implementation. This didn't allow to boot a Linux 64 bit EFI kernel from these 32 bit EFI systems. This limitation has been removed, a 64-bit kernel can be booted on 32-bit firmware that runs on 64 bit CPUs (note that it is not possible to boot a mixed-mode enabled kernel via the EFI boot stub - a bootloader that supports the EFI handover protocol must be used)

[http://git.kernel.org/linus/0154416a71c2a84c3746c8dd8ed25287e36934d3 commit 1], [http://git.kernel.org/linus/4f9dbcfc40299ddaa780fe8c1cd74998c1be3af5 2], [http://git.kernel.org/linus/54b52d87268034859191d671505bb1cfce6bd74d 3], [http://git.kernel.org/linus/099240ac111aac454962e6399c0cc51d1511504a 4], [http://git.kernel.org/linus/b8ff87a6158886771677e6dc8139bac6e3cba717 5], [http://git.kernel.org/linus/e10848a26a962e404ac00c897dfe54f14290806d 6], [http://git.kernel.org/linus/18c46461d9e42d398536055f31f58cdcd2c6347e 7], [http://git.kernel.org/linus/9a11040ff962304c1838aa9a9f33be78784eae47 8], [http://git.kernel.org/linus/3f4a7836e33134d4ac34fa7c99788f0c6a79fa1c 9], [http://git.kernel.org/linus/c116e8d60adabfd545a269fccab85e77febc1643 10], [http://git.kernel.org/linus/7d453eee36ae4cf30fc2f2faae54f634c4f863b7 11]