dentry_cache using up all my zone normal memory

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I'm running 2.6.10 on a pentium-M system with 3 gig of RAM. I'm running with NFS root, no swap.

Normally at idle I use about 20MB of memory.

When I run LTP everything is fine until it hits the rename14 test. Invariably during that test the OOM killer kicks in.

With a bit of digging the culprit appears to be the dentry_cache. The last log I have shows it using 817MB of memory. Right after that the oom killer kicked me off the system. When I logged back in, the cache usage was back down to normal and everything was fine.

Anyone have any suggestions?

Chris
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