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Kent Overstreet cb6055e66f bcachefs: Handle race between stripe reuse, invalidate_stripe_to_dev
When creating a new stripe, we may reuse an existing stripe that has
some empty and some nonempty blocks.

Generally, the existing stripe won't change underneath us - except for
block sector counts, which we copy to the new key in
ec_stripe_key_update.

But the device removal path can now invalidate stripe pointers to a
device, and that can race with stripe reuse.

Change ec_stripe_key_update() to check for and resolve this
inconsistency.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
History 2024-10-13 22:03:03 -04:00
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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.