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* 2.4.21-pre1: Memory leak in buffer code?
@ 2003-04-25  0:49 Nigel Cunningham
  0 siblings, 0 replies; only message in thread
From: Nigel Cunningham @ 2003-04-25  0:49 UTC (permalink / raw)
  To: Linux Kernel Mailing List


This script seems to reveal a memory leak of some sort in the buffer
code. I have run it on the same filesystem mounted as both ext2 and ext3
under 2.4.21-pre1, and in both cases get decreasing free memory and
increasing buffers. The line which activates the problem is the echo
which is directed to testlog.



while [ 1 ]; do
	MEMFREE=`head -2 /proc/meminfo | tail -1 | awk -F ' ' '{ print $4 }'`
	BUFFERS=`head -2 /proc/meminfo | tail -1 | awk -F ' ' '{ print $6 }'`
	echo -e -n "\rIteration $ITERATION. MemFree is $MEMFREE. Buffers is $BUFFERS"
	echo "Run $ITERATION beginning at `date`" > /testlog

I think I can also shed some light on a possible area to look at. I
originally found the problem while examining what appeared to be a
memory leak in swsusp. I set things up to bug on a page allocation where
the memory leak seemed to occur, and the page allocation was being
called from __pollwait in fs/select.c.

Hope this is helpful.


Nigel Cunningham
495 St Georges Road South, Hastings 4201, New Zealand

Be diligent to present yourself approved to God as a workman who does
not need to be ashamed, handling accurately the word of truth.
	-- 2 Timothy 2:14, NASB.

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2003-04-25  0:49 2.4.21-pre1: Memory leak in buffer code? Nigel Cunningham

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