I fear a kernel memory leak

Sat Jan 11 20:08:06 2003

I recently installed YDL-2.3 on a PBG3 (Pismo) and am loving it.

However, even with 640MB of ram, it looks like I'm running out of memory!
When watching /proc/meminfo, just sleeping and waking the machine
repeatedly seems to permanently use up some memory.  [and large chunks of
memory disappear at other times too]

On my first boot, /proc/meminfo claims that I'm using about 100MB.  After a
day of light usage, it says 400MB!

As a double-check, I ran ps, got the rsize column, and added it all up.
The net result shows about 64MB used, whereas /proc/meminfo now claims
410MB used.  I've included the output below.

I don't see any mention in the ps output for memory allocated by the
kernel, so obviously I can expect some discrepancy... but not 350MB worth!
Is there some way to find out what the kernel has allocated to where?

Jonathan

[Note 1: I'm not entirely confident of the rsize output.  The ps man page
claims vsize is in units of bytes, and vsize/rsize are roughly the same
outputs...  but it has to be kB!  I also don't know how it counts shared
pages and the like.  But in any case, that's what I see.]

[Note 2: I've definitely installed some nonstandard/newer versions of some
things, so there's a chance this is due to some mods I've done to the stock
system... but even so I'd love help in trying to figure out what and why.]

    $ cat memusage
	cat /proc/meminfo

	echo "0" > /tmp/calc
	ps -A -orsz --no-headers | sed -e "s~\(.*\)~\1 + ~" >> /tmp/calc
	echo "p" >> /tmp/calc
	dc /tmp/calc
	rm /tmp/calc

    $ ./memusage 
		total:    used:    free:  shared: buffers:  cached:
	Mem:  656564224 410882048 245682176        0 18911232 240668672
	Swap: 67100672        0 67100672
	MemTotal:       641176 kB
	MemFree:        239924 kB
	MemShared:           0 kB
	Buffers:         18468 kB
	Cached:         235028 kB
	SwapCached:          0 kB
	Active:         193592 kB
	Inactive:        88804 kB
	HighTotal:           0 kB
	HighFree:            0 kB
	LowTotal:       641176 kB
	LowFree:        239924 kB
	SwapTotal:       65528 kB
	SwapFree:        65528 kB
	63216