Konstantin Belousov 4a13a769dc Add support for BIO_DELETE on swap-backed md(4). In the case of BIO_DELETE ... covering the whole page, free the page. Otherwise, clear the region and mark it clean. Not marking the page dirty could reinstantiate cleared data, but it is allowed by BIO_DELETE specification and saves unneeded write to swap. Reviewed by: alc Tested by: pho MFC after: 2 weeks		2011-01-27 16:10:25 +00:00
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md.c	Add support for BIO_DELETE on swap-backed md(4). In the case of BIO_DELETE	2011-01-27 16:10:25 +00:00