 |
 |
 |
 |
 |
 |
Linux User-Mode Port |
|||||
Status Information
Releases
The current release of Fiasco is version 1.2, released 26 Sep 2005. It includes Fiasco-UX as a sub-architecture.The newest version is available from SVN.
Functionality
| Supported Linux Kernels | 2.2.x up to 2.6.x (earlier kernels untested) |
| Supported Processor Architectures | x86 only (Intel, AMD, other x86 compatibles) |
| Supported L4 ABIs | V.2 and X.0 |
- Port I/O and I/O flexpages (not planned)
- Small address spaces (not planned)
- Support for fast ring transitions using sysenter/sysexit
Performance
Because Fiasco-UX emulates a µ-kernel in user-mode, there is a performance penalty of a factor of about 50 to 100 for context switches compared to the native Fiasco kernel. This is comparable to the performance loss of User-Mode-Linux compared to native Linux.Fiasco-UX doesn't have the real-time properties of the native Fiasco kernel.
Agenda
What's up next:- Virtual devices and adapter spaces
