
Not all services involved in block I/O go through VM to access the blocks they need. As a result, the blocks in VM may become stale, possibly causing corruption when the stale copy is restored by a service that does go through VM later on. This patch restores support for forgetting cached blocks that belong to a particular device, and makes the relevant file systems use this functionality 1) when requested by VFS through REQ_FLUSH, and 2) upon unmount. Change-Id: I0758c5ed8fe4b5ba81d432595d2113175776aff8
Description
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