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63447b7dd4
Currently sctx->stat.last_physical only got updated in the following cases: - When the last stripe of a non-RAID56 chunk is scrubbed This implies a pitfall, if the last stripe is at the chunk boundary, and we finished the scrub of the whole chunk, we won't update last_physical at all until the next chunk. - When a P/Q stripe of a RAID56 chunk is scrubbed This leads the following two problems: - sctx->stat.last_physical is not updated for a almost full chunk This is especially bad, affecting scrub resume, as the resume would start from last_physical, causing unnecessary re-scrub. - "btrfs scrub status" will not report any progress for a long time Fix the problem by properly updating @last_physical after each stripe is scrubbed. And since we're here, for the sake of consistency, use spin lock to protect the update of @last_physical, just like all the remaining call sites touching sctx->stat. Reported-by: Michel Palleau <michel.palleau@gmail.com> Link: https://lore.kernel.org/linux-btrfs/CAMFk-+igFTv2E8svg=cQ6o3e6CrR5QwgQ3Ok9EyRaEvvthpqCQ@mail.gmail.com/ Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
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.