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    Btrfs: fix our overcommit math · a80c8dcf
    Josef Bacik 提交于
    I noticed I was seeing large lags when running my torrent test in a vm on my
    laptop.  While trying to make it lag less I noticed that our overcommit math
    was taking into account the number of bytes we wanted to reclaim, not the
    number of bytes we actually wanted to allocate, which means we wouldn't
    overcommit as often.  This patch fixes the overcommit math and makes
    shrink_delalloc() use that logic so that it will stop looping faster.  We
    still have pretty high spikes of latency, but the test now takes 3 minutes
    less time (about 5% faster).  Thanks,
    Signed-off-by: NJosef Bacik <jbacik@fusionio.com>
    a80c8dcf
extent-tree.c 215.8 KB