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authorJaegeuk Kim <jaegeuk.kim@samsung.com>2013-04-25 16:05:51 +0900
committerJaegeuk Kim <jaegeuk.kim@samsung.com>2013-04-29 11:19:21 +0900
commit55008d845d233396ed374473da4613cee691aa03 (patch)
treef869d0a791bee739b31714a49b8d8e092de44bf6 /tools/testing
parentd70b4f53b950676228297f0b204f2e1512c1ff6c (diff)
f2fs: enhance alloc_nid and build_free_nids flows
In order to avoid build_free_nid lock contention, let's change the order of function calls as follows. At first, check whether there is enough free nids. - If available, just get a free nid with spin_lock without any overhead. - Otherwise, conduct build_free_nids. : scan nat pages, journal nat entries, and nat cache entries. We should consider carefullly not to serve free nids intermediately made by build_free_nids. We can get stable free nids only after build_free_nids is done. Reviewed-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
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