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25d8f40560
It turns out that it's currently impossible to invalidate buckets containing only cached data if they're part of a stripe. The normal bucket invalidate path can't do it because we have to be able to incerement the bucket's gen, which isn't correct becasue it's still a member of the stripe - and the bucket invalidate path makes the bucket availabel for reuse right away, which also isn't correct for buckets in stripes. What would work is invalidating cached data by following backpointers, except that cached replicas don't currently get backpointers - because they would be awkward for the existing bucket invalidate path to delete and they haven't been needed elsewhere. So for the time being, to prevent running out of space in stripes, switch the data update path to not leave cached replicas; we may revisit this in the future. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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 Restructured Text 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.