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I have a kernel specific problem and this seemed like a suitable place to ask. I would like responces to be CC'ed to me if possible. I use a 2.6.17-ck1 kernel on an amd64 system. I have observed this problem on other/older kernels. Whenever there is serious hard drive activity (such as doing "slocate -u") ext3_inode_cache and dentry_cache grow to a combined 400-500 MiB. The amount of objects is more than half a million. This will slowly decrease to normal, but will take many hours. It does not result in any OOM, because i have 1 GiB of memory. As far as i understand hard drive cache should not be in the slab. Are these just the inode's, because the amount of memory consumption seems large for that? I have found a way to clear the memory (and unfortunately most of the cache): echo 100 > /proc/sys/vm/nr_hugepages echo 0 > /proc/sys/vm/nr_hugepages This suggest the kernel can free this memory. It's not the caching that bothers me, what bothers me is that it seems to reside in the slab. I am not a developer, so please keep that in mind when replying. I hope someone can be of help. Sincerely, Maarten Maathuis. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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