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Linux 2.6.36 introduced REQ_SECURE to indicate when discards *must* be processed, such that we cannot do optimizations like block alignment. Consequently, the discard semantics prior to 2.6.36 require us to always process unaligned discards. Previously, we would do this optimization regardless. This patch changes things to correctly restrict this optimization to situations where REQ_SECURE exists, but is not included in the flags. Signed-off-by: Richard Yao <ryao@gentoo.org> |
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