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e9bed72e88
Btrfs uses btrfs_bio to handle read/write of logical address, for the incoming bs > ps support, btrfs has extra requirements: - One folio must contain at least one fs block - No fs block can cross folio boundaries This requirement is not hard to maintain, thanks to the address space's minimal folio order. But not all btrfs bios are generated through address space, e.g. compression and scrub. To catch possible unaligned bios, introduce a helper, assert_bbio_alginment(), for each btrfs_bio in btrfs_submit_bbio(). This will check the following things: - bv_offset is aligned to block size - bv_len is aligned to block size With a btrfs bio passing above checks, unless it's empty it will ensure the requirements for bs > ps support. Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
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.