From: Haicheng Li <haicheng.li@linux.intel.com>
Date: Mon, 6 May 2013 15:15:41 +0000 (+0800)
Subject: f2fs: bugfix for alloc_nid_failed()
X-Git-Tag: v3.10-rc1~45^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=95630cbadc3588abff24a4b1989b72c943b27512;p=pandora-kernel.git

f2fs: bugfix for alloc_nid_failed()

Directly drop the free_nid cache when nm_i->fcnt > 2 * MAX_FREE_NIDS

Since there is NOT nmi->free_nid_list_lock spinlock protection between
a sequential calling of alloc_nid() and alloc_nid_failed(), some other
threads may already add new free_nid to the free_nid_list during this
period.

We need to make sure nmi->fcnt is never > 2 * MAX_FREE_NIDS.

Signed-off-by: Haicheng Li <haicheng.li@linux.intel.com>
[Jaegeuk Kim: fit the coding style]
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
---

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