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When loading metadata make sure to set/clear the dirty bits in the cache core's dirty_bitset as well as the policy. Otherwise the cache core is unaware that any blocks were dirty when the cache was last shutdown. A very serious side-effect being that the cleaner policy would therefore never be tasked with writing back dirty data from a cache that was in writeback mode (e.g. when switching from smq policy to cleaner policy when decommissioning a writeback cache). This fixes a serious data corruption bug associated with writeback mode. Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.