[SLUG] 2.4 VM is broken

From: Derek Glidden (dglidden@illusionary.com)
Date: Wed Jun 06 2001 - 12:23:02 EDT


I've kicked up a bit of an ant's nest on LKML about the state of VM/swap
under 2.4. If you were at the dinner with Maddog, I ranted about this
for a bit and you might remember some of the problems. I finally sat
down to do some actual tests against the 2.4 VM subsystem and came up
with some really ridiculous results. You might find this interesting
reading. (and then again, you may not...)

http://marc.theaimsgroup.com/?t=99178003800001&w=2&r=1

This is the only LKML archive I've been able to get to the past couple
of days, probably because of the PSI depeering by C&W. Unfortunately,
it lists the thread in reverse-chronological order so it's not very
intuitive the way it's presented as you'll have to start on the "Next"
page to get the beginning of the thread...

-- 
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
#!/usr/bin/perl -w
$_='while(read+STDIN,$_,2048){$a=29;$b=73;$c=142;$t=255;@t=map
{$_%16or$t^=$c^=($m=(11,10,116,100,11,122,20,100)[$_/16%8])&110;
$t^=(72,@z=(64,72,$a^=12*($_%16-2?0:$m&17)),$b^=$_%64?12:0,@z)
[$_%8]}(16..271);if((@a=unx"C*",$_)[20]&48){$h=5;$_=unxb24,join
"",@b=map{xB8,unxb8,chr($_^$a[--$h+84])}@ARGV;s/...$/1$&/;$d=
unxV,xb25,$_;$e=256|(ord$b[4])<<9|ord$b[3];$d=$d>>8^($f=$t&($d
>>12^$d>>4^$d^$d/8))<<17,$e=$e>>8^($t&($g=($q=$e>>14&7^$e)^$q*
8^$q<<6))<<9,$_=$t[$_]^(($h>>=8)+=$f+(~$g&$t))for@a[128..$#a]}
print+x"C*",@a}';s/x/pack+/g;eval 

usage: qrpff 153 2 8 105 225 < /mnt/dvd/VOB_FILENAME \ | extract_mpeg2 | mpeg2dec -

http://www.eff.org/ http://www.opendvd.org/ http://www.cs.cmu.edu/~dst/DeCSS/Gallery/



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