add directory Linux-0.98

Linux-0.98/docs/RELNOTES-0.97

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+Changes in 0.97:
+
+ - The VESA-support was removed.  I'd be happy to put it back once it
+   works on all hardware.  Instead of the VESA-code, I finally put in
+   the automatic SVGA setup patches.  See the top-level Makefile. 
+
+ - The IRQ code has solidified, and should work on all machines.  Not
+   all of the SCSI drivers use it yet, so I expect patches for that.. 
+
+ - Serial interrupts are handled slightly differently, and performance
+   should be up.  I've sent out a few alpha-releases, and testing seems
+   to indicate that's actually true this time.  Reactions have ranged
+   from "nice" to "wonderful" :-)
+
+ - The buffer-cache and memory management code has been edited quite a
+   bit.  ps/free etc programs that reads kernel memory directly no
+   longer work, and even a recompilation won't be enough.  They actually
+   need editing before they work. 
+
+   The buffer-cache now grows and shrinks dynamically depending on how
+   much free memory there is.  Shift+PrintScreen will give some memory
+   statistics.  (Ctrl+PrSc gives task-info, ALT+PrSc gives current
+   register values). 
+
+   The mm code changes removed some race-conditions in the VM code, and
+   I also tried to make the Out-of-swapspace error less severe (better
+   thrashing-detection etc).
+
+ - The super-block code has been cleaned up.  Especially the extended fs
+   needs to be edited a bit to take advantage of the new setup, and I
+   expect Remy Card will have a patch out eventually. 
+
+ - include-files have been moved around some more: there are still some
+   names that clash with the standard headers, but not many. 
+
+ - Unswappable processes implemented: by default only 'init' is
+   unswappable.  This is a bit safer in low-memory conditions, as at
+   least init won't die due to low memory.  I also made killing init
+   impossible: if init doesn't recognize a signal, it simply won't get
+   it.  Some other changes ("while (1) fork();" won't kill the machine
+   for non-root users etc)
+
+ - The new SCSI drivers are in.  These make the kernel noticeably
+   bigger, but you can leave them out if you don't want them.
+
+ - The floppy- and hd-drivers print out more debugging-info in case of
+   errors: this might be irritating if you have hardware that works, but
+   often gives soft-errors.  On the other hand, some old debugging-info
+   was removed - notably for user-level protection errors etc. 
+
+ - Various minor fixes.  I haven't made cdiffs (and I haven't gotten any
+   requests for them, so I probably never will), but they would be
+   pretty big. 
+
+Things that I didn't have time for:
+
+ - I wanted to rewrite the tty drivers to be more "streams-like" (ie not
+   an actual streams-implementation, but some of the ideas from
+   streams).  I never got around to it: there was simply too much else
+   to do. 
+
+ - I got a lot of patches, and some went in, others didn't.  If you
+   think your patch was important, please re-send it relative to the new
+   version.
+
+I'd like comments on the new system: performance / clarity of code etc. 
+0.97 should correct all known bugs (at least the ones I know about), but
+I guess that's just wishful thinking. 
+
+Note that the dynamic buffer-code also handles differently-sized
+buffers, but that the rest of the system (block device drivers,
+filesystem code etc) cannot yet take advantage of this - there is still
+some coding needed. 
+
+		Linus