Dag-Erling Smørgrav 0abd21bdb8 Implement BIO_DELETE for vnode devices by simply overwriting the deleted ... sectors with all-zeroes. The zeroes come from a static buffer; null(4) uses a dynamic buffer for the same purpose (for /dev/zero). It might be a good idea to have a static, shared, read-only all-zeroes page somewhere in the kernel that md(4), null(4) and any other code that needs zeroes could use. Reviewed by: kib MFC after: 3 weeks		2011-04-29 21:18:41 +00:00
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md.c	Implement BIO_DELETE for vnode devices by simply overwriting the deleted	2011-04-29 21:18:41 +00:00