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-rw-r--r--community/gsoc/project_ideas.mdwn7
-rw-r--r--community/gsoc/project_ideas/debian_installer.mdwn7
-rw-r--r--community/gsoc/project_ideas/driver_glue_code.mdwn11
-rw-r--r--community/gsoc/project_ideas/dtrace.mdwn67
-rw-r--r--community/gsoc/project_ideas/file_locking.mdwn47
-rw-r--r--community/gsoc/project_ideas/gccgo.mdwn11
-rw-r--r--community/gsoc/project_ideas/gdb.mdwn10
-rw-r--r--community/gsoc/project_ideas/gnat.mdwn12
-rw-r--r--community/gsoc/project_ideas/libgtop.mdwn15
-rw-r--r--community/gsoc/project_ideas/namespace-based_translator_selection.mdwn12
-rw-r--r--community/gsoc/project_ideas/object_lookups.mdwn9
-rw-r--r--community/gsoc/project_ideas/physical_memory_management.mdwn58
-rw-r--r--community/gsoc/project_ideas/procfs.mdwn17
-rw-r--r--community/gsoc/project_ideas/server_overriding.mdwn11
-rw-r--r--community/gsoc/project_ideas/sound.mdwn48
-rw-r--r--community/gsoc/project_ideas/sound/discussion.mdwn47
-rw-r--r--community/gsoc/project_ideas/tcp_ip_stack.mdwn3
-rw-r--r--community/gsoc/project_ideas/tmpfs.mdwn10
-rw-r--r--community/gsoc/project_ideas/virtualization.mdwn2
-rw-r--r--community/gsoc/project_ideas/vm_tuning.mdwn10
-rw-r--r--community/gsoc/project_ideas/xattr.mdwn50
21 files changed, 416 insertions, 48 deletions
diff --git a/community/gsoc/project_ideas.mdwn b/community/gsoc/project_ideas.mdwn
index 6ab3882..86e4490 100644
--- a/community/gsoc/project_ideas.mdwn
+++ b/community/gsoc/project_ideas.mdwn
@@ -1,5 +1,5 @@
[[!meta copyright="Copyright © 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015,
-2016 Free Software Foundation, Inc."]]
+2016, 2017, 2018 Free Software Foundation, Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
id="license" text="Permission is granted to copy, distribute and/or modify this
@@ -102,10 +102,8 @@ project_ideas:
community/gsoc/project_ideas/package_manager
community/gsoc/project_ideas/driver_glue_code
community/gsoc/project_ideas/language_bindings
- community/gsoc/project_ideas/gdb
community/gsoc/project_ideas/tcp_ip_stack
community/gsoc/project_ideas/nfs
- community/gsoc/project_ideas/sound
community/gsoc/project_ideas/disk_io_performance
community/gsoc/project_ideas/gnumach_cleanup
community/gsoc/project_ideas/xmlfs
@@ -113,8 +111,6 @@ project_ideas:
community/gsoc/project_ideas/lexical_dot-dot
community/gsoc/project_ideas/download_backends
community/gsoc/project_ideas/maxpath
- community/gsoc/project_ideas/gnat
- community/gsoc/project_ideas/gccgo
community/gsoc/project_ideas/hardware_libs
community/gsoc/project_ideas/cdparanoia
community/gsoc/project_ideas/perl_python
@@ -122,7 +118,6 @@ project_ideas:
community/gsoc/project_ideas/testing_framework
community/gsoc/project_ideas/libcap
community/gsoc/project_ideas/valgrind
- community/gsoc/project_ideas/dtrace
community/gsoc/project_ideas/libdiskfs_locking"
"""]]
diff --git a/community/gsoc/project_ideas/debian_installer.mdwn b/community/gsoc/project_ideas/debian_installer.mdwn
index 37dcc72..7edc20d 100644
--- a/community/gsoc/project_ideas/debian_installer.mdwn
+++ b/community/gsoc/project_ideas/debian_installer.mdwn
@@ -10,11 +10,14 @@ is included in the section entitled
[[!meta title="Port the Debian Installer to the Hurd"]]
-[!] Jérémie Koenig has been working on this as a [[Google Summer of Code
-2010|2010]] project.
+[[!template id=highlight text="""/!\ Obsolete /!\
---
+Jérémie Koenig has been working on this as a [[Google Summer of Code
+2010|2010]] project."""]]
+
+
The primary means of distributing the Hurd is through Debian GNU/Hurd.
However, the installation CDs presently use an ancient, non-native installer.
The situation could be much improved by making sure that the newer *Debian
diff --git a/community/gsoc/project_ideas/driver_glue_code.mdwn b/community/gsoc/project_ideas/driver_glue_code.mdwn
index c1850d2..1771756 100644
--- a/community/gsoc/project_ideas/driver_glue_code.mdwn
+++ b/community/gsoc/project_ideas/driver_glue_code.mdwn
@@ -1,5 +1,5 @@
-[[!meta copyright="Copyright © 2008, 2009, 2010, 2011, 2016 Free Software
-Foundation, Inc."]]
+[[!meta copyright="Copyright © 2008, 2009, 2010, 2011, 2016, 2017, 2018 Free
+Software Foundation, Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
id="license" text="Permission is granted to copy, distribute and/or modify this
@@ -27,7 +27,7 @@ This is [[!GNU_Savannah_task 5488]].
[[open issues/user-space device drivers]].
[[open issues/device drivers and io systems]].
-The most promising approach for getting newer drivers seems to be the Rump kernel:
+The most promising approach for getting newer drivers seems to be the [[Rump_Kernel]]:
it already does the hard work of providing an environment
where the foreign drivers can run,
and offers the additional benefit of being externally maintained.
@@ -69,8 +69,3 @@ such as memory management for example.
Possible mentors: Justus Winter (teythoon), Samuel Thibault (youpi)
Exercise: Install and run the current rumpkernel library (librump0) and the corresponding mplayer, get it to run.
-
----
-
-
-# 2016-02-14, Justus Winter
diff --git a/community/gsoc/project_ideas/dtrace.mdwn b/community/gsoc/project_ideas/dtrace.mdwn
new file mode 100644
index 0000000..f7aeb6e
--- /dev/null
+++ b/community/gsoc/project_ideas/dtrace.mdwn
@@ -0,0 +1,67 @@
+[[!meta copyright="Copyright © 2008, 2009, 2011, 2018 Free Software Foundation,
+Inc."]]
+
+[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
+id="license" text="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]]."]]"""]]
+
+[[!meta title="Kernel Instrumentation"]]
+
+[[!tag open_issue_gnumach]]
+
+[[!template id=highlight text="""/!\ Obsolete /!\
+
+---
+
+This is no longer valid as a Google Summer of Code project."""]]
+
+
+One of the main problems of the current Hurd implementation is very poor
+[[open_issues/performance]]. While we have a bunch of ideas what could cause the performance
+problems, these are mostly just guesses. Better understanding what really
+causes bad performance is necessary to improve the situation.
+
+For that, we need tools for performance measurements. While all kinds of more
+or less specific [[open_issues/profiling]] tools could be conceived, the most promising and
+generic approach seems to be a framework for logging certain events in the
+running system (both in the microkernel and in the Hurd servers). This would
+allow checking how much time is spent in certain modules, how often certain
+situations occur, how things interact, etc. It could also prove helpful in
+debugging some issues that are otherwise hard to find because of complex
+interactions.
+
+The most popular kernel instrumentation framework is Sun's dtrace,
+originally written for Solaris,
+but also adopted by some other systems.
+However, the GPL-incompatible license means it can't be used in Linux,
+and thus Linux developers created their own frameworks instead:
+first [[SystemTap]], and now [[LTTng]].
+
+In 2008, Andrei Barbu did initial work on kernel probes for the Hurd.
+However, not all of his patches got merged,
+because some turned out not to be fully functional.
+Also, he didn't get around to work on userspace probes,
+nor on a nice frontend for writing test scripts employing the probes.
+
+The goal of this project is to make the instrumentation framework
+more usable and complete,
+and to better integrate it in the Hurd.
+For that, the student will have to work
+on some real profiling and/or debugging tasks,
+and fix any shortcomings he encounters in the framework.
+
+This is a pretty involved task.
+Previous experience with low-level programming is a must;
+and it also requires a good grasp on interactions in complex systems.
+
+To work on this project,
+the student will have to get familiar with GNU Mach.
+(The microkernel employed by the Hurd.)
+Some understanding of other aspects of the Hurd will also be required,
+depending on the exact nature of the profiling/debugging performed.
+
+Exercise: Use the existing probes to perform some simple measurement.
diff --git a/community/gsoc/project_ideas/file_locking.mdwn b/community/gsoc/project_ideas/file_locking.mdwn
new file mode 100644
index 0000000..a368a7a
--- /dev/null
+++ b/community/gsoc/project_ideas/file_locking.mdwn
@@ -0,0 +1,47 @@
+[[!meta copyright="Copyright © 2008, 2009, 2012, 2014, 2018 Free Software
+Foundation, Inc."]]
+
+[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
+id="license" text="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]]."]]"""]]
+
+[[!meta title="Fix and Complete File Locking Support"]]
+
+[[!template id=highlight text="""/!\ Obsolete /!\
+
+---
+
+This is no longer valid as a Google Summer of Code project."""]]
+
+
+Over the years, [[UNIX]] has acquired a host of different file locking mechanisms.
+Some of them work on the Hurd, while others are buggy or only partially
+implemented. This breaks many applications.
+
+The goal is to make all file locking mechanisms work properly. This requires
+finding all existing shortcomings (through systematic testing and/or checking
+for known issues in the bug tracker and mailing list archives), and fixing
+them. The biggest missing feature is record locking, i.e. the lockf variant,
+which needs a complete implementation.
+
+This task will require digging into parts of the code to understand how file
+locking works on the Hurd. Only general programming skills are required.
+
+A preliminary patch is [[!GNU_Savannah_patch 332 desc="available"]].
+
+Exercise: Find one of the existing issues, either by looking at the task/bug
+filed on [[open_issues/file_locking]], on
+trackers on savannah, or by trying things out yourself; and take a go at it.
+Note though that most of these issues are probably not trivial -- it's quite
+likely that you won't be able to actually fix any of them in the time available
+during the application process. However, you might be able to spot something
+else that could be improved while looking into this.
+
+If after trying for a while you haven't found anything easy enough to improve
+in the locking-related code, talk to us about some alternative exercise task.
+Perhaps you actually find something you could do while looking through the bug
+tracker or trying stuff yourself in search of locking issues :-)
diff --git a/community/gsoc/project_ideas/gccgo.mdwn b/community/gsoc/project_ideas/gccgo.mdwn
index 54b2075..3d9f544 100644
--- a/community/gsoc/project_ideas/gccgo.mdwn
+++ b/community/gsoc/project_ideas/gccgo.mdwn
@@ -1,4 +1,5 @@
-[[!meta copyright="Copyright © 2011, 2012 Free Software Foundation, Inc."]]
+[[!meta copyright="Copyright © 2011, 2012, 2018 Free Software Foundation,
+Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
id="license" text="Permission is granted to copy, distribute and/or modify this
@@ -10,6 +11,14 @@ License|/fdl]]."]]"""]]
[[!meta title="Porting Google Go (GCC: gccgo)"]]
+[[!template id=highlight text="""/!\ Obsolete /!\
+
+---
+
+This is no longer valid as a Google Summer of Code project; existing work needs
+to be integrated first."""]]
+
+
The goal of this project is to make the [Google Go programming
language](http://golang.org/) available on GNU/Hurd in its [[GCC]] *gccgo*
implementation.
diff --git a/community/gsoc/project_ideas/gdb.mdwn b/community/gsoc/project_ideas/gdb.mdwn
index 255ac23..e5c279b 100644
--- a/community/gsoc/project_ideas/gdb.mdwn
+++ b/community/gsoc/project_ideas/gdb.mdwn
@@ -1,4 +1,4 @@
-[[!meta copyright="Copyright © 2013 Free Software Foundation, Inc."]]
+[[!meta copyright="Copyright © 2013, 2018 Free Software Foundation, Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
id="license" text="Permission is granted to copy, distribute and/or modify this
@@ -12,6 +12,14 @@ License|/fdl]]."]]"""]]
[[!tag open_issue_gdb]]
+[[!template id=highlight text="""/!\ Obsolete /!\
+
+---
+
+This is no longer valid as a Google Summer of Code project; existing work needs
+to be integrated first."""]]
+
+
[[/GDB]] is available and working on GNU Hurd. However, there are some bugs
and there is missing functionality compared to a port targeting the Linux
kernel ([[tag/Open_Issue_GDB]], [diff of
diff --git a/community/gsoc/project_ideas/gnat.mdwn b/community/gsoc/project_ideas/gnat.mdwn
index ee6afa2..17d016c 100644
--- a/community/gsoc/project_ideas/gnat.mdwn
+++ b/community/gsoc/project_ideas/gnat.mdwn
@@ -1,5 +1,5 @@
-[[!meta copyright="Copyright © 2009, 2011, 2012, 2013 Free Software Foundation,
-Inc."]]
+[[!meta copyright="Copyright © 2009, 2011, 2012, 2013, 2018 Free Software
+Foundation, Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
id="license" text="Permission is granted to copy, distribute and/or modify this
@@ -11,6 +11,14 @@ License|/fdl]]."]]"""]]
[[!meta title="Porting GNAT (GCC)"]]
+[[!template id=highlight text="""/!\ Obsolete /!\
+
+---
+
+This is no longer valid as a Google Summer of Code project; existing work needs
+to be integrated first."""]]
+
+
An initial port of the GNU Ada Translator (GNAT) is available for the Hurd.
The goal of this project is to continue improving and polishing that port and
diff --git a/community/gsoc/project_ideas/libgtop.mdwn b/community/gsoc/project_ideas/libgtop.mdwn
index 41897a1..42a3fe6 100644
--- a/community/gsoc/project_ideas/libgtop.mdwn
+++ b/community/gsoc/project_ideas/libgtop.mdwn
@@ -1,4 +1,4 @@
-[[!meta copyright="Copyright © 2009, 2010, 2012 Free Software Foundation,
+[[!meta copyright="Copyright © 2009, 2010, 2012, 2018 Free Software Foundation,
Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
@@ -11,9 +11,12 @@ is included in the section entitled
[[!meta title="Porting libgtop"]]
-/!\ On 2012-05-05 Andjos reported (commit
-web.git:8061106f2d1f15fa9a54947bc45d4cba68d89bba) that this task has already
-been completed.
+[[!template id=highlight text="""/!\ Obsolete /!\
+
+---
+
+This is no longer valid as a Google Summer of Code project; it's done."""]]
+
libgtop is a library used by many applications (especially GNOME applications)
to abstract the system-specific methods for obtaining information about the
@@ -33,7 +36,3 @@ This task doesn't require any specific previous knowledge (besides of general
C/UNIX programming skills of course); but during the course of the project,
some knowledge about Hurd internals will have to be obtained, along with a bit
of Debian stuff.
-
-Possible mentors: Samuel Thibault (youpi)
-
-Exercise: Fix one of the shortcomings in the existing procfs implementation.
diff --git a/community/gsoc/project_ideas/namespace-based_translator_selection.mdwn b/community/gsoc/project_ideas/namespace-based_translator_selection.mdwn
index f668b6f..e41059b 100644
--- a/community/gsoc/project_ideas/namespace-based_translator_selection.mdwn
+++ b/community/gsoc/project_ideas/namespace-based_translator_selection.mdwn
@@ -1,4 +1,4 @@
-[[!meta copyright="Copyright © 2008, 2009, 2012 Free Software Foundation,
+[[!meta copyright="Copyright © 2008, 2009, 2012, 2018 Free Software Foundation,
Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
@@ -11,12 +11,16 @@ License|/fdl]]."]]"""]]
[[!meta title="Namespace-based Translator Selection"]]
-[!] [[Sergiu Ivanov|scolobb]] has been working *voluntarily* on this task an
-inofficial GSoC 2008 participant. Not all the desired functionality is in
-place yet, though.
+[[!template id=highlight text="""/!\ Obsolete? /!\
---
+This is probably no longer valid as a Google Summer of Code project.
+[[Sergiu Ivanov|scolobb]] has been working *voluntarily* on this task an
+inofficial GSoC 2008 participant. Not all the desired functionality is in
+place yet, though, but the status needs to be evaluated."""]]
+
+
The main idea behind the Hurd is to make (almost) all system functionality
user-modifiable ([[extensible_system|extensibility]]). This includes a
user-modifiable filesystem: the whole filesystem is implemented decentrally, by
diff --git a/community/gsoc/project_ideas/object_lookups.mdwn b/community/gsoc/project_ideas/object_lookups.mdwn
index d7a5831..0bbd419 100644
--- a/community/gsoc/project_ideas/object_lookups.mdwn
+++ b/community/gsoc/project_ideas/object_lookups.mdwn
@@ -1,4 +1,4 @@
-[[!meta copyright="Copyright © 2013, 2014, 2016 Free Software Foundation,
+[[!meta copyright="Copyright © 2013, 2014, 2016, 2018 Free Software Foundation,
Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
@@ -11,6 +11,13 @@ License|/fdl]]."]]"""]]
[[!meta title="Improved System Object Lookups"]]
+[[!template id=highlight text="""/!\ Obsolete /!\
+
+---
+
+This is no longer valid as a Google Summer of Code project."""]]
+
+
The Hurd currently uses its ihash library ([[hurd/libihash]]) as a generic
container for various objects. While it does its job, it has been reported
to suffer from high collision rates. In addition, the "one size fits all"
diff --git a/community/gsoc/project_ideas/physical_memory_management.mdwn b/community/gsoc/project_ideas/physical_memory_management.mdwn
new file mode 100644
index 0000000..af36050
--- /dev/null
+++ b/community/gsoc/project_ideas/physical_memory_management.mdwn
@@ -0,0 +1,58 @@
+[[!meta copyright="Copyright © 2015, 2016, 2018 Free Software Foundation,
+Inc."]]
+
+[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
+id="license" text="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]]."]]"""]]
+
+[[!meta title="Physical memory management"]]
+
+[[!template id=highlight text="""/!\ Obsolete /!\
+
+---
+
+This is no longer valid as a Google Summer of Code project; it was basically
+done by Richard."""]]
+
+
+GNU Mach is currently suffering from severe limitations caused by the way
+it manages physical memory. For example, since it requires pages to be mapped
+in kernel space in order to be used, the maximum amount of usable physical
+memory is currently around 800MB (or 1.8GB if a 2/2 split is set). And
+because the page allocator is unable to easily return blocks of contiguous
+pages, the kernel has to use virtual memory to provide contiguity.
+But the kernel virtual space is separate from the direct mapping of
+physical memory, so the larger it is, the less physical pages available.
+The size of the kernel space is currently around 200MB, with around 100MB
+for kernel objects. This small size prevents the system from achieving
+scalability, since a panic occurs when the kernel is unable to allocate
+a kernel object such as a port. In addition, the kernel uses mainly tables
+to store IPC rights. When a table is full, it is enlarged through a kernel
+specific version of realloc(). When a file system starts managing many
+files (e.g. because some of their content is cached in physical memory),
+these tables can get big enough to make realloc() fail because of
+fragmentation.
+
+The goal of this project is to make as much physical memory available as
+possible for both the kernel and applications, by rewriting the page
+allocator into a buddy allocator to support contiguous block allocations,
+using it directly instead of virtual memory as the backend of the slab
+allocator for kernel objects, and, if time allows it, transform IPC right
+tables (e.g. into radix trees) and get rid of realloc().
+
+This project requires a good understanding of virtual memory (both physical
+mappings at the MMU level and virtual mappings at the VM level), and strong
+skills in C programming. Note that some work has already been done in the
+X15 project about this, and can be reused as a reference.
+
+Useful links :
+
+ * <https://www.sceen.net/mapping-physical-memory-directly/>
+
+ * <http://git.sceen.net/rbraun/x15.git/>
+
+ * <https://git.sceen.net/rbraun/librbraun.git/plain/rdxtree.h>
diff --git a/community/gsoc/project_ideas/procfs.mdwn b/community/gsoc/project_ideas/procfs.mdwn
index ac5fa6d..00479d7 100644
--- a/community/gsoc/project_ideas/procfs.mdwn
+++ b/community/gsoc/project_ideas/procfs.mdwn
@@ -1,5 +1,5 @@
-[[!meta copyright="Copyright © 2008, 2009, 2011, 2012 Free Software Foundation,
-Inc."]]
+[[!meta copyright="Copyright © 2008, 2009, 2011, 2012, 2018 Free Software
+Foundation, Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
id="license" text="Permission is granted to copy, distribute and/or modify this
@@ -11,14 +11,17 @@ License|/fdl]]."]]"""]]
[[!meta title="procfs"]]
-[!] Madhusudan.C.S has implemented a new, fully functional
-[[procfs|madhusudancs]] as a [[GSoC 2008 project|2008]].
+[[!template id=highlight text="""/!\ Obsolete /!\
+
+---
-[!] This was not the end of the story: [[jkoenig's
+This is no longer valid as a Google Summer of Code project.
+Madhusudan.C.S has implemented a new, fully functional
+[[procfs|madhusudancs]] as a [[GSoC 2008 project|2008]].
+This was not the end of the story: [[jkoenig's
`procfs`|hurd/translator/procfs]] is yet another re-written and
-improved version.
+improved version."""]]
----
Although there is no standard (POSIX or other) for the layout of the `/proc`
pseudo-filesystem, it turned out a very useful facility in GNU/Linux and other
diff --git a/community/gsoc/project_ideas/server_overriding.mdwn b/community/gsoc/project_ideas/server_overriding.mdwn
index 6e3d5e1..50996b8 100644
--- a/community/gsoc/project_ideas/server_overriding.mdwn
+++ b/community/gsoc/project_ideas/server_overriding.mdwn
@@ -1,5 +1,5 @@
-[[!meta copyright="Copyright © 2008, 2009, 2013, 2014 Free Software Foundation,
-Inc."]]
+[[!meta copyright="Copyright © 2008, 2009, 2013, 2014, 2018 Free Software
+Foundation, Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
id="license" text="Permission is granted to copy, distribute and/or modify this
@@ -11,6 +11,13 @@ License|/fdl]]."]]"""]]
[[!meta title="Server Overriding Mechanism"]]
+[[!template id=highlight text="""/!\ Obsolete /!\
+
+---
+
+This is no longer valid as a Google Summer of Code project."""]]
+
+
/!\ [[!tag open_issue_documentation]] Is this completely resolved by
[[open_issues/virtualization/remap_root_translator]]?
diff --git a/community/gsoc/project_ideas/sound.mdwn b/community/gsoc/project_ideas/sound.mdwn
new file mode 100644
index 0000000..1a33ae2
--- /dev/null
+++ b/community/gsoc/project_ideas/sound.mdwn
@@ -0,0 +1,48 @@
+[[!meta copyright="Copyright © 2008, 2009, 2018 Free Software Foundation,
+Inc."]]
+
+[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
+id="license" text="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]]."]]"""]]
+
+[[!meta title="Sound Support"]]
+
+[[!template id=highlight text="""/!\ Obsolete /!\
+
+---
+
+This is no longer valid as a Google Summer of Code project."""]]
+
+
+The Hurd presently has no sound support. Fixing this, [[!GNU_Savannah_task
+5485]], requires two steps: the first is to port some other kernel's drivers to
+[[GNU_Mach|microkernel/mach/gnumach]] so we can get access to actual sound
+hardware. The second is to implement a userspace server ([[hurd/translator]]),
+that implements an interface on top of the kernel device that can be used by
+applications -- probably OSS or maybe ALSA.
+
+Completing this task requires porting at least one driver (e.g. from Linux) for
+a popular piece of sound hardware, and the basic userspace server. For the
+driver part, previous experience with programming kernel drivers is strongly
+advisable. The userspace part requires some knowledge about programming Hurd
+translators, but shouldn't be too hard.
+
+Once the basic support is working, it's up to the student to use the remaining
+time for porting more drivers, or implementing a more sophisticated userspace
+infrastructure. The latter requires good understanding of the Hurd philosophy,
+to come up with an appropriate design.
+
+Another option would be to evaluate whether a driver that is completely running
+in user-space is feasible. <!-- TODO. Elaborate. -->
+
+Exercise: This project requires kernel (driver framework) hacking as well as
+some Hurd server hacking; so the exercise should involve either of these, or
+even both. You could for example port some newer driver to run in the existing
+framework (see the [[device_driver|driver_glue_code]] project description), or
+try to make some fix(es) to the [unfinished random device
+implementation](http://savannah.gnu.org/patch/?6088) created by Michael
+Casadevall.
diff --git a/community/gsoc/project_ideas/sound/discussion.mdwn b/community/gsoc/project_ideas/sound/discussion.mdwn
new file mode 100644
index 0000000..4a95eb6
--- /dev/null
+++ b/community/gsoc/project_ideas/sound/discussion.mdwn
@@ -0,0 +1,47 @@
+[[!meta copyright="Copyright © 2013 Free Software Foundation, Inc."]]
+
+[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
+id="license" text="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]]."]]"""]]
+
+[[!taglink open_issue_documentation]]: update [[sound]] page.
+
+
+# IRC, freenode, #hurd, 2013-09-01
+
+ <rekado> I'm new to the hurd but I'd love to learn enough to work on sound
+ support.
+ <rekado>
+ http://darnassus.sceen.net/~hurd-web/community/gsoc/project_ideas/sound/
+ says drivers should be ported to GNU Mach as a first step.
+ <rekado> Is this information still current or should the existing Linux
+ driver be wrapped with DDE instead?
+ <auronandace> if i recall correctly dde is currently only being used for
+ network drivers. i'm not sure how much work would be involved for sound
+ or usb
+
+
+## IRC, freenode, #hurd, 2013-09-02
+
+ <rekado> The sound support proposal
+ (http://darnassus.sceen.net/~hurd-web/community/gsoc/project_ideas/sound/)
+ recommends porting some other kernel's sound driver to GNU Mach. Is this
+ still current or should DDE be used instead?
+ <pinotree> rekado: dde or anything userspace-based is generally preferred
+ <braunr> rekado: both are about porting some other kernel's sound driver
+ <braunr> dde is preferred yes
+ <rekado> This email says that sound drivers are already partly working with
+ DDE: http://os.inf.tu-dresden.de/pipermail/l4-hackers/2009/004291.html
+ <rekado> So, should I just try to get some ALSA kernel parts to compile
+ with DDE?
+ <pinotree> well, what is missing is also the dde←→hurd glue
+ <braunr> rekado: there is also a problem with pci arbitration
+ <rekado> pinotree: I assumed DDEKit works with the hurd and we could use
+ any DDE/<other kernel> glue code with it
+ * rekado looks up pci arbitration
+ <pinotree> only for networking atm
+ <rekado> ah, I see.
diff --git a/community/gsoc/project_ideas/tcp_ip_stack.mdwn b/community/gsoc/project_ideas/tcp_ip_stack.mdwn
index 6410dee..f86dcf7 100644
--- a/community/gsoc/project_ideas/tcp_ip_stack.mdwn
+++ b/community/gsoc/project_ideas/tcp_ip_stack.mdwn
@@ -1,4 +1,5 @@
-[[!meta copyright="Copyright © 2008, 2009 Free Software Foundation, Inc."]]
+[[!meta copyright="Copyright © 2008, 2009, 2017 Free Software Foundation,
+Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
id="license" text="Permission is granted to copy, distribute and/or modify this
diff --git a/community/gsoc/project_ideas/tmpfs.mdwn b/community/gsoc/project_ideas/tmpfs.mdwn
index c38c6da..394ec5a 100644
--- a/community/gsoc/project_ideas/tmpfs.mdwn
+++ b/community/gsoc/project_ideas/tmpfs.mdwn
@@ -1,4 +1,4 @@
-[[!meta copyright="Copyright © 2008, 2009, 2012 Free Software Foundation,
+[[!meta copyright="Copyright © 2008, 2009, 2012, 2018 Free Software Foundation,
Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
@@ -11,11 +11,15 @@ License|/fdl]]."]]"""]]
[[!meta title="Fix tmpfs"]]
-[!] [[Maksym_Planeta]] has been making good progress here; status is tracked at
-[[here|hurd/translator/tmpfs/discussion]].
+[[!template id=highlight text="""/!\ Obsolete /!\
---
+This is no longer valid as a Google Summer of Code project.
+[[Maksym_Planeta]] has been making good progress here; status is tracked at
+[[here|hurd/translator/tmpfs/discussion]]."""]]
+
+
In some situations it is desirable to have a file system that is not backed by
actual disk storage, but only by anonymous memory, i.e. lives in the RAM (and
possibly swap space).
diff --git a/community/gsoc/project_ideas/virtualization.mdwn b/community/gsoc/project_ideas/virtualization.mdwn
index f1a6f40..6f9853e 100644
--- a/community/gsoc/project_ideas/virtualization.mdwn
+++ b/community/gsoc/project_ideas/virtualization.mdwn
@@ -1,4 +1,4 @@
-[[!meta copyright="Copyright © 2008, 2009, 2016 Free Software Foundation,
+[[!meta copyright="Copyright © 2008, 2009, 2016, 2017 Free Software Foundation,
Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
diff --git a/community/gsoc/project_ideas/vm_tuning.mdwn b/community/gsoc/project_ideas/vm_tuning.mdwn
index ecc5f9f..c243d8e 100644
--- a/community/gsoc/project_ideas/vm_tuning.mdwn
+++ b/community/gsoc/project_ideas/vm_tuning.mdwn
@@ -1,4 +1,5 @@
-[[!meta copyright="Copyright © 2008, 2009 Free Software Foundation, Inc."]]
+[[!meta copyright="Copyright © 2008, 2009, 2018 Free Software Foundation,
+Inc."]]
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
id="license" text="Permission is granted to copy, distribute and/or modify this
@@ -10,6 +11,13 @@ is included in the section entitled
[[!meta title="VM Tuning"]]
+[[!template id=highlight text="""/!\ Obsolete /!\
+
+---
+
+This is no longer valid as a Google Summer of Code project."""]]
+
+
Hurd/[[microkernel/Mach]] presently make very bad use of the available physical memory in the
system. Some of the problems are inherent to the system design (the kernel
can't distinguish between important application data and discardable disk
diff --git a/community/gsoc/project_ideas/xattr.mdwn b/community/gsoc/project_ideas/xattr.mdwn
new file mode 100644
index 0000000..f35498f
--- /dev/null
+++ b/community/gsoc/project_ideas/xattr.mdwn
@@ -0,0 +1,50 @@
+[[!meta copyright="Copyright © 2009, 2016, 2018 Free Software Foundation,
+Inc."]]
+
+[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
+id="license" text="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]]."]]"""]]
+
+[[!meta title="Implement xattr Support"]]
+
+[[!template id=highlight text="""/!\ Obsolete /!\
+
+---
+
+This is no longer valid as a Google Summer of Code project; it's done."""]]
+
+
+Extended attributes (xattr) are a standardized, generic method for storing
+additional metadata along with a file (inode). Most modern UNIX filesystems
+support xattrs.
+
+In general, xattrs should be used sparingly, as they are less transparent than
+data stored as explicit file contents; however, there are some cases where they
+really make sense. The Hurd's variant of ext2 presently uses some additional
+fields in the inode to store Hurd-specific metadata: most notable passive
+translator settings. As these fields are Hurd-specific, they can't be accessed
+by the standard methods from Linux for example, so it's not possible to fully
+work with a Hurd filesystem on GNU/Linux (copy, backup etc.); and also, even
+when on Hurd, only tools that explicitly support the Hurd-specific information
+can handle them.
+
+Using extended attributes instead of custom fields for the Hurd-specific
+information would be very helpful.
+
+The most important goal of this project thus is to make the Hurd ext2fs server
+able to store and read the Hurd-specific information with extended attributes
+instead of the custom fields, so it become accessible from other systems. Being
+able to access the information through the standard xattr API instead of
+Hurd-specific calls is also desirable. (And in turn requires implementing the
+generic xattr API first, which can be useful for other purposes as well.)
+
+Completing this project will require digging into some parts of the Hurd, but
+it should be quite doable without previous Hurd experience. Some experience
+with xattrs might help a bit, but shouldn't be really necessary either.
+
+Some previous work on xattr support is [[available|open_issues/xattr]], and
+might serve as a starting point.