From 5e5745dcaf73c5860a16c09572d59383ecee6d28 Mon Sep 17 00:00:00 2001
From: Yan <yanzheng@21cn.com>
Date: Fri, 16 Nov 2007 14:57:09 -0500
Subject: [PATCH] Btrfs: Add full_scan parameter to find_search_start

This patch adds a new parameter 'full_scan' to 'find_search_start',
thereby 'find_search_start' can know whether 'find_free_extent' is in
full scan phrase. I feel that 'find_search_start' should skip calling
'btrfs_find_block_group' when 'find_free_extent' is in full scan
phrase. In my test on a 2GB volume, Oops occurs when space usage is
about 76%. After apply the patch,  Oops occurs when space usage is
near 100%.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
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