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| Filename | Latest commit message | Latest commit date |
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845b9e229f
Use resize_stripes() instead of raid5_reset_stripe_cache() to allocate or free sh->ppl_page at runtime for all stripes in the stripe cache. raid5_reset_stripe_cache() required suspending the mddev and could deadlock because of GFP_KERNEL allocations. Move the 'newsize' check to check_reshape() to allow reallocating the stripes with the same number of disks. Allocate sh->ppl_page in alloc_stripe() instead of grow_buffers(). Pass 'struct r5conf *conf' as a parameter to alloc_stripe() because it is needed to check whether to allocate ppl_page. Add free_stripe() and use it to free stripes rather than directly call kmem_cache_free(). Also free sh->ppl_page in free_stripe(). Set MD_HAS_PPL at the end of ppl_init_log() instead of explicitly setting it in advance and add another parameter to log_init() to allow calling ppl_init_log() without the bit set. Don't try to calculate partial parity or add a stripe to log if it does not have ppl_page set. Enabling ppl can now be performed without suspending the mddev, because the log won't be used until new stripes are allocated with ppl_page. Calling mddev_suspend/resume is still necessary when disabling ppl, because we want all stripes to finish before stopping the log, but resize_stripes() can be called after mddev_resume() when ppl is no longer active. Suggested-by: NeilBrown <neilb@suse.com> Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com> Signed-off-by: Shaohua Li <shli@fb.com> |
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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.