From: Roland Dreier <rolandd@cisco.com>
Date: Tue, 6 May 2008 22:03:38 +0000 (-0700)
Subject: RDMA/cxgb3: Don't add PBL memory to gen_pool in chunks
X-Git-Tag: v2.6.26-rc2~31^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0e9913362a967377eb886bbdf305ec58aa07a878;p=pandora-kernel.git

RDMA/cxgb3: Don't add PBL memory to gen_pool in chunks

Current iw_cxgb3 code adds PBL memory to the driver's gen_pool in 2 MB
chunks.  This limits the largest single allocation that can be done to
the same size, which means that with 4 KB pages, each of which takes 8
bytes of PBL memory, the largest memory region that can be allocated
is 1 GB (256K PBL entries * 4 KB/entry).

Remove this limit by adding all the PBL memory in a single gen_pool
chunk, if possible.  Add code that falls back to smaller chunks if
gen_pool_add() fails, which can happen if there is not sufficient
contiguous lowmem for the internal gen_pool bitmap.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
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