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06d7a56fe0
There's an unavoidable issue with btree lookups when we're overlaying journal keys and the journal has many deletions for keys present in the btree - peek operations will have to iterate over all those deletions to find the next live key to return. This is mainly a problem for lookups in interior nodes, if we have to traverse to a leaf. Looking up an insert position in a leaf (for journal replay) doesn't have to find the next live key, but walking down the btree does. So to ameloriate this, change journal key sort ordering so that we replay keys from roots and interior nodes first. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> |
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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.