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