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SubjectRe: Gigantic memory leak in linux-2.6.[789]!
Gene Heskett wrote:

> Stable, yes. But only after about 3 or 4 iterations. The first 3
> rather handily used 500+ megs of memory that I did not get back when
> I stopped it and cleaned up the mess.

Did you run a memory hog to put memory pressure on the system?

The following is with 2.6.9-rc4

-bash-2.05b$ while true ; do tar -xjf linux-2.6.7.tar.bz2 ; rm -rf linux-2.6.7 ;
vmstat ; done
procs memory swap io system cpu
r b swpd free buff cache si so bi bo in cs us sy wa id
1 0 0 1675768 104004 112576 0 0 0 1 11 2 0 0 0 10
procs memory swap io system cpu
r b swpd free buff cache si so bi bo in cs us sy wa id
1 1 0 1649032 110792 112724 0 0 0 1 11 3 0 0 0 10
procs memory swap io system cpu
r b swpd free buff cache si so bi bo in cs us sy wa id
1 0 0 1630472 118580 112620 0 0 0 2 11 3 0 0 0 10
procs memory swap io system cpu
r b swpd free buff cache si so bi bo in cs us sy wa id
1 0 0 1607560 125500 112636 0 0 0 2 11 3 0 0 0 10

After running a memory hog,

-bash-2.05b$ vmstat
procs memory swap io system cpu
r b swpd free buff cache si so bi bo in cs us sy wa id
0 0 0 1890248 672 4836 0 0 0 3 11 3 0 0 0 10


Looks like the cached memory all got freed, which is exactly as expected.

Chris
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