Messages in this thread | ![/](/images/icornerl.gif) | | Date | Fri, 25 Apr 2003 12:49:04 +1200 | From | Nigel Cunningham <> | Subject | 2.4.21-pre1: Memory leak in buffer code? |
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Hi.
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.
#!/bin/bash
RUN=1
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 $ITERATION beginning at `date`" > /testlog ITERATION=$(($ITERATION+1)) done
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
-- 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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