In recent days after Christmas and New Year, Linux 5.5 development has been accelerating. In the Linux Kernel 5.5-rc4 after, at present, Linux Kernel fifth release candidate cycle 5.5, Linux 5.5-rc5 also completed the release.
Linus Torvalds pointed out that in Linux 5.5-rc5 release, has been on the drivers (mainly network, gpu, media, sound, block), core network, a variety of architectures, and security subsystem fixes (apparmor and tomoyo) were "fully restored."
However, he summed up as these are "all over the place a few small patches." It is worth mentioning that one of Linux 5.5-rc5 fix is AppArmor fix, fix the performance is in the early benchmark of 5.5.
In addition, in the short 5.5-rc5 announcement in, Linus Torvalds also pays homage to the recently deceased Minix developer Bruce Evans. Bruce Evans i386 is responsible for most of the work, the time can be traced back to Linus on Linux before using it's become self-hosting.
details:
http://lkml.iu.edu/hypermail/linux/kernel/2001.0/02828.html
https://www.phoronix.com/scan.php?page=news_item&px=Linux-5.5-rc5-Released