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- From: rhealey@ub.d.umn.edu (Rob Healey)
- Newsgroups: comp.unix.amiga
- Subject: Re: Current Amiga Unix release
- Date: 17 Nov 1992 14:19:28 -0600
- Organization: University of Minnesota, Duluth
- Lines: 41
- Message-ID: <1ebk4gINN7ut@ub.d.umn.edu>
- References: <1992Nov17.165120.63997@watson.ibm.com> <1992Nov17.190416.5920@news.acns.nwu.edu>
- NNTP-Posting-Host: ub.d.umn.edu
-
- In article <1992Nov17.190416.5920@news.acns.nwu.edu> skrenta@casbah.acns.nwu.edu (Rich Skrenta) writes:
- =sck@watson.ibm.com (Scott C. Kennedy) writes:
- => For those who did not know. Amix 2.03 was the last version the Rich Skrenta
- => (the original poster) worked on before he "left" Commodore.
- =
- =2.03 was the last Amiga Unix release put out before the number of
- =people in the Amiga Unix group dropped to zero. I was technically
- =the last one, and I did leave, no quotes.
- =
-
- Just a short addition. An individual not directly in the UNIX
- group did work on the kernel and utilities that resulted in
- the 2.1 release. I will let that person identify themselves if
- they wish to. Jan Carlson spent many long hours, along with the
- beta testers that were left, testing the resulting code. The
- big change from 2.03->2.1 is the protection of data structures
- involved with buffer operations at properl spl() levels
- so the data structures won't be corrupted.
-
- This corruption showed up mainly as ufs "caused" panics, the real
- problem being ufs chows buffers like their going out of style, i.e.
- fast and furrious, and so when doing stuff like news unbatching alot
- of buffers would be created and destroyed, when the chains weren't
- protected properly,. i.e. use of spl() to prevent interruption in
- critical regions, they would get corrupted and BOOM! Panic time.
- The buffer routines were also used by many other sections of the kernel
- so it wasn't just UFS that was effected but UFS placed the most stress
- on the code.
-
- For this reason, I suggest anybody with 2.03 try to get 2.1 as soon
- as possible since it is only a matter of time, or if you use ufs,
- before panics will occur.
-
- 2.1 also has tweeks to the uucp subsystem so it doesn't count as a user,
- tweeks to the console login so the console devices only count as 1
- user, some sysadm cleanup, newer revs of the PD code most
- notably mtools has been adapted to 1.44M IBM format and the
- format command can handle 720k, 880k and 1.44M if you have the HD
- floppy.
-
- -Rob
-