From: Andy Grover <andy.grover@oracle.com>
Date: Tue, 25 May 2010 03:12:41 +0000 (-0700)
Subject: RDS: Use page_remainder_alloc() for recv bufs
X-Git-Tag: v2.6.37-rc1~147^2~499^2~35
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0b088e003ccf316a76c51be5dec2d70b93be3be8;p=pandora-kernel.git

RDS: Use page_remainder_alloc() for recv bufs

Instead of splitting up a page into RDS_FRAG_SIZE chunks
ourselves, ask rds_page_remainder_alloc() to do it. While it
is possible PAGE_SIZE > FRAG_SIZE, on x86en it isn't, so having
duplicate "carve up a page into buffers" code seems excessive.

The other modification this spawns is the use of a single
struct scatterlist in rds_page_frag instead of a bare page ptr.
This causes verbosity to increase in some places, and decrease
in others.

Finally, I decided to unify the lifetimes and alloc/free of
rds_page_frag and its page. This is a nice simplification in itself,
but will be extra-nice once we come to adding cmason's recycling
patch.

Signed-off-by: Andy Grover <andy.grover@oracle.com>
---

Reading git-diff-tree failed