Messages in this thread | | | Date | Sat, 12 Aug 2006 21:11:16 -0400 | From | Rik van Riel <> | Subject | Re: [RFC][PATCH 0/9] Network receive deadlock prevention for NBD |
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David Miller wrote: > From: Peter Zijlstra <a.p.zijlstra@chello.nl> > Date: Sat, 12 Aug 2006 12:18:07 +0200 > >> 65535 sockets * 128 packets * 16384 bytes/packet = >> 1^16 * 1^7 * 1^14 = 1^(16+7+14) = 1^37 = 128G of memory per IP >> >> And systems with a lot of IP numbers are not unthinkable. > > TCP restricts the amount of global memory that may be consumed > by all TCP sockets via the tcp_mem[] sysctl.
This is exactly why we need to be careful which sockets we allocate memory for, when the system is about to run out of memory.
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