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[ Upstream commitcdb330f4b4] If MDSs aren't available while mounting a filesystem, the session state will transition from SESSION_OPENING to SESSION_CLOSING. And in that scenario check_session_state() will be called from delayed_work() and trigger this WARN. Avoid this by only WARNing after a session has already been established (i.e., the s_ttl will be different from 0). Fixes:62575e270f("ceph: check session state after bumping session->s_seq") Signed-off-by: Luis Henriques <lhenriques@suse.de> Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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.