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[[meta copyright="Copyright © 2005, 2006, 2007
Free Software Foundation, Inc."]]
[[meta license="Permission is granted to copy, distribute and/or modify this
document under the terms of the GNU Free Documentation License, Version 1.2 or
any later version published by the Free Software Foundation; with no Invariant
Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
is included in the section entitled
[[GNU_Free_Documentation_License|/fdl]]."]]
This page is a place to keep track of ideas about things that may be improved
in GNU Mach, so that it'll evolve to a reliable microkernel for The Hurd, both
in terms of stability and performance. If you find anything missing here,
please feel free to add a entry with a short description.
If you want to help with any of the task (thanks!), please send a mail to
*[[mailing_lists/bug-hurd]]* stating what task you wish to work on,
so that no duplicate efforts end up.
# Task List
* [[Clean_up_the_code]]
* Update the core architecture and drivers
* Check what NetBSD, FreeBSD and Linux do with their host specific code
(i486, PPC, Sparc, ...). And if it might be wise to take that and use it
in GNU Mach. There is no need to worry about purely internal API's, but
the external ones shouldn't require any major changes.
* Write a list of all functions provided by the host dependant code in GNU
Mach that gets used in the non-host specific code (kernel, IPC and VM).
* Once we have decided what the new internal API should look like, make a
list of the new API and the old one, and try to make things as compatible
as possible, but not at the expense of anything.
* Implement Migrating Threads
* Migrating Threads (MT) could improve IPC performance and making easier the
work of the scheduler. For more information, check
<http://www.usenix.org/publications/library/proceedings/sf94/ford.html>
* Improve the external pagers interface
* Making this interface synchronous should improve I/O performance
significantly, without (almost) any drawbacks (we also get some advantage
from MT's).
* Implement more paging eviction policies, so they fit better with usual
behaviour of the pagers.
* Implement resource accounting for external pagers.
* VM
* Put it on user level (?)
* Clean up the mess.
* Provide a fast way to read/write from/to a memory object.
* Simplify/normalise the code.
* Simplify the IPC Semantics
* There are a lot of things in GNU Mach's IPC that we don't need. Track down
those things, and get rid of them without requiring many changes in the
Hurd (the changes will affect MiG, but that is OK).
* Temporary mappings for Client-Server memory transfers
* Extend Mach's IPC to provide some kind of object which can represent a
range of memory that can temporarily be mapped into the servers address
space for sending/receiving data. This would allow us to avoid excessive
memory copies.
* Find a new way to work with unaligned memory.
* GDB remote debugging support
* Implement support for GDB debugging via serial line and/or network. Maybe
this can be done together with the host-specific work above.
# Wish List
* Interface for userspace non-critical drivers.
* Sound Support
* WLAN support (ipw2200) with WEP/WPA
* ACPI support
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