bcache: fix using of loop variable in memory shrink

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In bch_mca_scan(), There are some confusion and logical error in the use of
loop variables. In this patch, we clarify them as:
1) nr: the number of btree nodes needs to scan, which will decrease after
we scan a btree node, and should not be less than 0;
2) i: the number of btree nodes have scanned, includes both
btree_cache_freeable and btree_cache, which should not be bigger than
btree_cache_used;
3) freed: the number of btree nodes have freed.

Signed-off-by: Tang Junhui <tang.junhui@zte.com.cn>
Reviewed-by: Michael Lyle <mlyle@lyle.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Tang Junhui 2018-03-18 17:36:22 -07:00 • committed by Jens Axboe

parent f3641c3abd

commit ca71df3166

1 changed files with 6 additions and 3 deletions

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9

drivers/md/bcache/btree.c

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