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%block_len could be checked on deciding if two em are mergeable. merge_extent_mapping() has only added the front pad if the front part of em gets truncated, but it's possible that the end part gets truncated. For both compressed extent and inline extent, em->block_len is not adjusted accordingly, and for regular extent, em->block_len always equals to em->len, hence this sets em->block_len with em->len. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Reviewed-by: Josef Bacik <jbacik@fb.com> Signed-off-by: David Sterba <dsterba@suse.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.