--- Gnu-Mach/NEWS 2020/09/02 04:45:00 1.1.1.4 +++ Gnu-Mach/NEWS 2020/09/02 04:51:44 1.1.1.7 @@ -1,5 +1,70 @@ -2013-09-27 -Version 1.4 +Version 1.7 (2016-05-18) + +The code has been updated to work with newer versions of GCC, and numerous bugs +have been fixed throughout the code, including a pageout deadlock. The code +uses integer types from now instead of the old Mach types. + +The VM cache policy change has been merged. The kernel now caches +unreferenced VM objects unconditionally instead of using a fixed +limit. + +The physical page allocator of the X15 kernel has been integrated, and +is now used directly by the slab allocator. This increases the kernel +heap addressing important scalability issues. + +The gsync synchronization mechanism was added, similar to the Linux kernel's +futexes, to allow efficient and powerful userland synchronization. + +Support for profiling kernel code from userland through sampling was added. + +Version 1.6 (2015-10-31) + +The code has been updated to work with newer versions of the compiler, +and numerous bugs have been fixed throughout the code. + +The lock debugging infrastructure has been revived and improved, and +many locking issues have been fixed. + +The IPC tables and the hash table mapping objects to IPC entries have +been replaced by radix trees. This addresses a scalability issue, as +IPC tables required huge amounts of continuous virtual kernel memory. + +The kernel now allows non-privileged users to wire a small amount of +memory. + +A bug hindering the eviction of inactive pages by the pageout daemon +has been identified and fixed. + +The kernel now keeps timestamps relative to the system boot time. +Among other things this fixes bogus uptime readings if the system time +is altered. + +A reference leak in the exception handling mechanism has been +identified and fixed. + +ANSI escape sequences are now handled when using `printf'. This fixes +the formatting of messages printed by various Linux drivers. + +Version 1.5 (2015-04-10) + +Numerous cleanups and stylistic fixes of the code base. Several +problems have been identified using static analysis tools and +subsequently been fixed. + +A protected payload can now be associated with capabilities. This +payload is attached by the kernel to delivered messages and can be +used to speed up the object lookup in the receiving task. + +The kernel debugger can now parse ELF symbol tables, can be invoked +over serial lines, gained two new commands and has received usability +improvements. + +The vm pageout policy has been tuned to accommodate modern hardware. + +The kernel gained partial ACPI support on x86, enough to power down +the system. + +Version 1.4 (2013-09-27) Really too many to list them individually. Highlight include numerous bug and stability fixes, a Xen port for 32-bit x86 including basic support for Physical