Messages in this thread | | | Date | Sat, 4 Feb 2006 12:52:17 +0100 | From | Holger Eitzenberger <> | Subject | Re: Linux 2.6.15.2 |
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On Fri, Feb 03, 2006 at 11:14:14AM -0800, Andrew Morton wrote:
> http://www.mail-archive.com/netdev@vger.kernel.org/msg06355.html
> > A look into /proc/sys/net/ipv4/tcp_mem showed that that the values in > > there were way to high. I hope that a reduction of these values will > > help (not done yet).
> Sounds different. Please test a more recent kernel and if the problem is > still there, send a report to linux-kernel and cc netdev@vger.kernel.org. > Include the contents of /proc/meminfo and /proc/slabinfo. Thanks.
I solved the issue.
Recent kernels have alloc_large_system_hash() exactly for that, and tcp_init() uses it. It has nr_all_pages and nr_kernel_pages to determine the actual size of usable RAM, whereas 2.6.10 just uses num_physpages. That's the reason why the values in tcp_mem are way too high on machines with 3-4 Gig RAM.
Thanks. /holger
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