lkml.org 
[lkml]   [2003]   [Sep]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    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
    >
    > -
    > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    > the body of a message to majordomo@vger.kernel.org
    > More majordomo info at http://vger.kernel.org/majordomo-info.html
    > Please read the FAQ at http://www.tux.org/lkml/

    --
    ---------------------------------------------------------
    Victor Yodaiken
    Finite State Machine Labs: The RTLinux Company.
    www.fsmlabs.com www.rtlinux.com
    1+ 505 838 9109

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 13:48    [W:0.030 / U:0.008 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site