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由 Kevin Corry 提交于
Record basic I/O statistics for mapped devices. Signed-off-by: NKevin Corry <kevcorry@us.ibm.com> Signed-off-by: NAlasdair G Kergon <agk@redhat.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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