Re: Memory leak in 2.6.11-rc1?

[Parag Warudkar]

I am running 2.6.11-rc2+ fix for the pipe related leak by Linus. I am 
currently running a QT+KDE compile with distcc on two machines.  I am 
running these machines for around 11 hours now and  swap seems to be 
growing steadily on the -rc2 box - it went to ~260kb after 10hrs, after 
which I ran swapoff.  Now after couple hours it is at 40kb. The other 
machine is Knoppix 2.4.26 kernel with lesser memory and it hasn't run 
into swap at all.

On the -rc2 machine, however, I don't feel anything is sluggish yet. But 
I think if I leave it running long enough it might run out of memory.

I don't know if this is perfectly normal given the differences between 
2.4.x and 2.6.x VM. I will  keep it running and under load for a while 
and report any interesting stuff.

Here is /proc/meminfo on the rc2 box as of now -
root@localhost paragw]# cat /proc/meminfo
MemTotal:       775012 kB
MemFree:         55260 kB
Buffers:         72732 kB
Cached:         371956 kB
SwapCached:         40 kB
Active:         489508 kB
Inactive:       182360 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:       775012 kB
LowFree:         55260 kB
SwapTotal:      787176 kB
SwapFree:       787136 kB
Dirty:            2936 kB
Writeback:           0 kB
Mapped:         259024 kB
Slab:            32288 kB
CommitLimit:   1174680 kB
Committed_AS:   450692 kB
PageTables:       3072 kB
VmallocTotal:   253876 kB
VmallocUsed:     25996 kB
VmallocChunk:   226736 kB
HugePages_Total:     0
HugePages_Free:      0
Hugepagesize:     4096 kB

Parag
Andrew Morton wrote:

> Jens Axboe <axboe@xxxxxxx> wrote:
>  
>
> > This is my current situtation:
> >
> > ...
> > axboe@wiggum:/home/axboe $ cat /proc/meminfo 
> > MemTotal:      1024992 kB
> > MemFree:          9768 kB
> > Buffers:         76664 kB
> > Cached:         328024 kB
> > SwapCached:          0 kB
> > Active:         534956 kB
> > Inactive:       224060 kB
> > HighTotal:           0 kB
> > HighFree:            0 kB
> > LowTotal:      1024992 kB
> > LowFree:          9768 kB
> > SwapTotal:           0 kB
> > SwapFree:            0 kB
> > Dirty:            1400 kB
> > Writeback:           0 kB
> > Mapped:         464232 kB
> > Slab:           225864 kB
> > CommitLimit:    512496 kB
> > Committed_AS:   773844 kB
> > PageTables:       8004 kB
> > VmallocTotal: 34359738367 kB
> > VmallocUsed:       644 kB
> > VmallocChunk: 34359737167 kB
> > HugePages_Total:     0
> > HugePages_Free:      0
> > Hugepagesize:     2048 kB
> >    
>
> OK.  There's rather a lot of anonymous memory there - 700M on the LRU, 300M
> pageache, 400M anon, 200M of slab.  You need some swapspace ;)
>
> What are the symptoms?  Slow to load applications?  Lots of paging?  Poor
> I/O speeds?
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