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c65c13f0ea
The btree key cache maintains lists of items that have been freed, but can't yet be reclaimed because a bch2_trans_relock() call might find them - we're waiting for SRCU readers to release. Previously, we wouldn't count these items against the number we're attempting to scan for, which would mean we'd evict more live key cache entries - doing quite a bit of potentially unecessary work. With recent work to make sure we don't hold SRCU locks for too long, it should be safe to count all the items on the freelists against number to scan - even if we can't reclaim them yet, we will be able to soon. 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.