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Diffstat (limited to 'community/gsoc/project_ideas/tmpfs.mdwn')
| -rw-r--r-- | community/gsoc/project_ideas/tmpfs.mdwn | 51 |
1 files changed, 0 insertions, 51 deletions
diff --git a/community/gsoc/project_ideas/tmpfs.mdwn b/community/gsoc/project_ideas/tmpfs.mdwn deleted file mode 100644 index c38c6da8..00000000 --- a/community/gsoc/project_ideas/tmpfs.mdwn +++ /dev/null @@ -1,51 +0,0 @@ -[[!meta copyright="Copyright © 2008, 2009, 2012 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 tmpfs"]] - -[!] [[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). - -A simplistic way to implement such a memory filesystem is literally creating a -ramdisk, i.e. simply allocating a big chunk of RAM (called a memory store in -Hurd terminology), and create a normal filesystem like ext2 on that. However, -this is not very efficient, and not very convenient either (the filesystem -needs to be recreated each time the ramdisk is invoked). A nicer solution is -having a real [[hurd/translator/tmpfs]], which creates all filesystem -structures directly in RAM, allocating memory on demand. - -The Hurd has had such a tmpfs for a long time. However, the existing -implementation doesn't work anymore -- it got broken by changes in other parts -of the Hurd design. - -There are several issues. The most serious known problem seems to be that for -technical reasons it receives [[microkernel/mach/RPC]]s from two different -sources on one [[microkernel/mach/port]], and gets mixed up with them. Fixing -this is non-trivial, and requires a good understanding of the involved -mechanisms. - -The goal of this project is to get a fully working, full featured tmpfs -implementation. It requires digging into some parts of the Hurd, including the -[[pager_interface|hurd/libpager]] and [[hurd/translator]] programming. This -task probably doesn't require any design work, only good debugging skills. - -Possible mentors: Carl Fredrik Hammar (cfhammar) - -Exercise: Take a look at tmpfs and try to fix one of the existing issues. Some -of them are probably not too tricky; or you might discover something else you -could improve while working on it. If you don't find anything obvious, contact -us about a different exercise task. |