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SubjectRe: log-buf-len dynamic
If people would just wake up to the lossy memory compression algorithms that
Steve Tweedie invented, the whole problem could be solved in a moment.

On Wed, Sep 24, 2003 at 12:12:51AM -0400, Rik van Riel wrote:
> On Tue, 23 Sep 2003, Linus Torvalds wrote:
>
> > Yeah, SunOS was nice. But I really think it's the access patterns that
> > changed.
>
> Absolutely. Garbage collection and object orientation have
> obsoleted LRU and related algorithms.
>
> Huge memory sizes also have done their share to obsolete
> recency based replacement algorithms.
>
> I suspect we'll want something closer to a frequency based
> replacement scheme in the future. Possibly something like
> LIRS or ARC, but adapted to work in a general purpose OS in
> a very light weight way.
>
> The argument that because we have more memory replacement
> is no longer as important doesn't quite hold because the
> cost of page replacement, measured in cpu cycles, has gone
> completely through the roof in the last decades.
>
> Then there's the whole different bag of cookies that is the
> caching of filesystem metadata, like our inode and dentry
> caches. I'm not sure what would be a good replacement
> strategy for those, but I do know that we'll want a good
> algorithm here because hard disks (and the number of files
> on them) are growing so much faster than anything else in
> our computers...
>
> --
> "Debugging is twice as hard as writing the code in the first place.
> Therefore, if you write the code as cleverly as possible, you are,
> by definition, not smart enough to debug it." - Brian W. Kernighan
>
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