2a4c32edd3
Pull MD updates from Shaohua Li: - a raid5 writeback cache feature. The goal is to aggregate writes to make full stripe write and reduce read-modify-write. It's helpful for workload which does sequential write and follows fsync for example. This feature is experimental and off by default right now. - FAILFAST support. This fails IOs to broken raid disks quickly, so can improve latency. It's mainly for DASD storage, but some patches help normal raid array too. - support bad block for raid array with external metadata - AVX2 instruction support for raid6 parity calculation - normalize MD info output - add missing blktrace - other bug fixes * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md: (66 commits) md: separate flags for superblock changes md: MD_RECOVERY_NEEDED is set for mddev->recovery md: takeover should clear unrelated bits md/r5cache: after recovery, increase journal seq by 10000 md/raid5-cache: fix crc in rewrite_data_only_stripes() md/raid5-cache: no recovery is required when create super-block md: fix refcount problem on mddev when stopping array. md/r5cache: do r5c_update_log_state after log recovery md/raid5-cache: adjust the write position of the empty block if no data blocks md/r5cache: run_no_space_stripes() when R5C_LOG_CRITICAL == 0 md/raid5: limit request size according to implementation limits md/raid5-cache: do not need to set STRIPE_PREREAD_ACTIVE repeatedly md/raid5-cache: remove the unnecessary next_cp_seq field from the r5l_log md/raid5-cache: release the stripe_head at the appropriate location md/raid5-cache: use ring add to prevent overflow md/raid5-cache: remove unnecessary function parameters raid5-cache: don't set STRIPE_R5C_PARTIAL_STRIPE flag while load stripe into cache raid5-cache: add another check conditon before replaying one stripe md/r5cache: enable IRQs on error path md/r5cache: handle alloc_page failure ...
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.