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f82b735936
Compression code path has only flaged bios with REQ_OP_WRITE no matter where the bios come from, but it could be a sync write if fsync starts this writeback or a normal writeback write if wb kthread starts a periodic writeback. It breaks the rule that sync writes and writeback writes need to be differentiated from each other, because from the POV of block layer, all bios need to be recognized by these flags in order to do some management, e.g. throttlling. This passes writeback_control to compression write path so that it can send bios with proper flags to block layer. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com> |
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| README | ||
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.