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由 Qu Wenruo 提交于
This is for later data checksum verification at RMW time. This patch will try to allocate the needed memory for a locked rbio if the rbio is for data exclusively (we don't want to handle mixed bg yet). The memory will be released when the rbio is finished. Signed-off-by: NQu Wenruo <wqu@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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