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The bio structure consumes a substantial part of dm_buffer. The bio structure is only needed when doing I/O on the buffer, thus we don't have to embed it in the buffer. Allocate the bio structure only when doing I/O. We don't need to create a bio_set because, in case of allocation failure, dm-bufio falls back to using dm-io (which keeps its own bio_set). Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.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.