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bf0fdb4d89
It doesn't make much sense to be erasure coding cached pointers, we should be erasure coding one of the dirty pointers in an extent. This patch makes sure we're passing BCH_WRITE_CACHED when we expect the new pointer to be a cached pointer, and tweaks the write path to not allocate from a stripe when BCH_WRITE_CACHED is set - and fixes an assertion we were hitting in the ec path where when adding the stripe to an extent and deleting the other pointers the pointer to the stripe didn't exist (because dropping all dirty pointers from an extent turns it into a KEY_TYPE_error key). Signed-off-by: Kent Overstreet <kent.overstreet@gmail.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 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.