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Nothing checks its return value. Is it safe to skip checking return value of btrfs_wait_tree_block_writeback? Liu Bo: I think yes, it's used in walk_log_tree which is called in two places, free_log_tree and log replay. For free_log_tree, it waits for any running writeback of the extent buffer under freeing to finish in case we need to access the eb pointer from page->private, and it's OK to not check the return value, while for log replay, it's doesn't wait because wc->wait is not set. So neither cares about the writeback error. Signed-off-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Liu Bo <bo.li.liu@oracle.com> [ added more explanation to changelog, from Liu Bo ] Signed-off-by: David Sterba <dsterba@suse.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.