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Alexander Aring 2776635edc dlm: fix remove member after close call 
The idea of commit 63e711b081 ("fs: dlm: create midcomms nodes when
configure") is to set the midcomms node lifetime when a node joins or
leaves the cluster. Currently we can hit the following warning:

[10844.611495] ------------[ cut here ]------------
[10844.615913] WARNING: CPU: 4 PID: 84304 at fs/dlm/midcomms.c:1263
dlm_midcomms_remove_member+0x13f/0x180 [dlm]

or running in a state where we hit a midcomms node usage count in a
negative value:

[  260.830782] node 2 users dec count -1

The first warning happens when the a specific node does not exists and
it was probably removed but dlm_midcomms_close() which is called when a
node leaves the cluster. The second kernel log message is probably in a
case when dlm_midcomms_addr() is called when a joined the cluster but
due fencing a node leaved the cluster without getting removed from the
lockspace. If the node joins the cluster and it was removed from the
cluster due fencing the first call is to remove the node from lockspaces
triggered by the user space. In both cases if the node wasn't found or
the user count is zero, we should ignore any additional midcomms handling
of dlm_midcomms_remove_member().

Fixes: 63e711b081 ("fs: dlm: create midcomms nodes when configure")
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
2023-10-12 15:20:37 -05:00
arch Misc fixes: 2023-10-08 09:27:20 -07:00
block
certs
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Documentation Devicetree fixes for v6.6, part 2: 2023-10-07 10:05:16 -07:00
drivers - Fix memory leak when freeing dm zoned target device 2023-10-07 10:17:48 -07:00
fs dlm: fix remove member after close call 2023-10-12 15:20:37 -05:00
include arm64 fixes for -rc5 2023-10-06 07:46:25 -07:00
init
io_uring io-wq: fully initialize wqe before calling cpuhp_state_add_instance_nocalls() 2023-10-05 14:11:18 -06:00
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kernel Misc fixes: 2023-10-08 09:57:59 -07:00
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MAINTAINERS - Fix memory leak when freeing dm zoned target device 2023-10-07 10:17:48 -07:00
Makefile Linux 6.6-rc5 2023-10-08 13:49:43 -07:00
README

README 

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.