Messages in this thread | | | Date | Thu, 23 Oct 2003 10:47:13 -0200 (BRST) | From | Marcelo Tosatti <> | Subject | Re: High Utilization kswapd and kupdated in Large memory system |
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On Thu, 23 Oct 2003, vwake wrote:
> Hi, > On large memory machine ( 32 GB RAM) any continuous disk activity puts kswapd and kupdated to 99% utilization and eventually ( in about 10 mins) brings down the whole machine. > > The machine works well when the memory was set at 4GB using the 'mem=" > entry on grub.conf. The same disk operations succeed when kept in this > config. > > > The kernel is version 2.4.22 stable downloaded from kernel.org, and compiled with 64GB option enabled. The machine is installed with Redhat Linux 9.0. > > No errors gets logged anywhere and also there are no console error > messages. The machine eventually gets locked up, and only a hard reset > will bring it back into shape. I do not suspect the hardware because it > is reproduceable in a different machine with similar hardware config. > > > The hardware config as below: > > Dell PE 6650 / 4* Xeon 2GHz / 32 GB RAM / 500 GB Raid 5 on PERC 3DC ( AMI megaraid driver) 6 DISCS / 2* Broadcom 100/1000 NIC ( bcm5700 driver) > > The system has / and /boot in ext3 and rest in ReiserFS. The 500 GB data partition is in ReiserFS. > > The problem is reproducible by just copying some large data ( 3-5 GB ) to any of the filesystems. > One observation ( may not be useful) is that the symptoms starts after the cached memory in /proc/meminfo goes beyond 16GB ! > > > I had tried changing the "elvtune" parameters to " -r 4096 -w 8192" as adviced in some of the archived maillist mails. But this didnt help ! > > Please let me know if any further information is needed from the machine.
Hi,
Can you please try 2.4.23-pre?
There have been significant highmem balancing changes.
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