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Before rbio_orig_end_io() goes to free rbio, rbio may get merged with more bios from other rbios and rbio->bio_list becomes non-empty, in that case, these newly merged bios don't end properly. Once unlock_stripe() is done, rbio->bio_list will not be updated any more and we can call bio_endio() on all queued bios. It should only happen in error-out cases, the normal path of recover and full stripe write have already set RBIO_RMW_LOCKED_BIT to disable merge before doing IO, so rbio_orig_end_io() called by them doesn't have the above issue. Reported-by: Jérôme Carretero <cJ-ko@zougloub.eu> Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: David Sterba <dsterba@suse.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.