I noticed that the first lines of dumping the pack file show the size of
the pack which is pretty close to the size of the missing memory:
Fri Jan 22 10:22:38 CST 2010
total used free shared buffers cached
Mem: 1021768 444560 577208 0 22568 106268
-/+ buffers/cache: 315724 706044
Swap: 329292 0 329292
-----------------
Fri Jan 22 10:58:27 CST 2010
total used free shared buffers cached
Mem: 1021768 344036 677732 0 37752 119860
-/+ buffers/cache: 186424 835344
Swap: 329292 0 329292
/var/lib/ureadahead/pack: created Fri, 22 Jan 2010 16:23:23 +0000 for hdd 8:1
16 inode groups, 1819 files, 1793 blocks (114844 kB)
315724-186424=129300
I am not getting anymore segfaults in X when I remove the pack file.
(this is a lucid test machine so there were many updates since then.)
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ureadahead doesn't free memory after profile
https://bugs.launchpad.net/bugs/501715
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