David Miller wrote:
From: John Heffner <[EMAIL PROTECTED]>
Date: Wed, 14 Mar 2007 17:25:22 -0400
The current tcp_mem initialization gives values that are really too
small for systems with ~256-768 MB of memory, and also for systems with
larger page sizes (ia64). This patch gives an alternate method of
initialization that doesn't depend on the cache allocation functions,
but I think should still provide a nice curve that gives a smaller
fraction of total memory with small-memory systems, while maintaining
the same upper bound (pressure at 1/2, max as 3/4) on larger memory systems.
Indeed, it's really dumb for any of these calculations to be
dependant upon the page size.
Your patch looks good, and I'll review it further tomorrow and
push upstream unless I find some issues with it.
Thanks John.
The way it's coded is somewhat opaque since it has to be done with
32-bit integer arithmetic. These plots might help make the motivation
behind the code a little clearer.
Thanks,
-John
