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There are a number of callers of nfs_pageio_complete() that want to continue using the nfs_pageio_descriptor without needing to call nfs_pageio_init() again. Examples include nfs_pageio_resend() and nfs_pageio_cond_complete(). The problem is that nfs_pageio_complete() also calls nfs_pageio_cleanup_mirroring(), which frees up the array of mirrors. This can lead to writeback errors, in the next call to nfs_pageio_setup_mirroring(). Fix by simply moving the allocation of the mirrors to nfs_pageio_setup_mirroring(). Link: https://bugzilla.kernel.org/show_bug.cgi?id=196709 Reported-by: JianhongYin <yin-jianhong@163.com> Cc: stable@vger.kernel.org # 4.0+ Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.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.