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由 Martin K. Petersen 提交于
Introduce a BLKZEROOUT ioctl which can be used to clear block ranges by way of blkdev_issue_zeroout(). Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com> Acked-by: NMike Snitzer <snitzer@redhat.com> Signed-off-by: NJens Axboe <axboe@kernel.dk>
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