mirror of https://gitee.com/openkylin/linux.git
a47666eb76
There are some problems with the connections_lock. During my experiements I saw sometimes circular dependencies with sock_lock. The reason here might be code parts which runs nodeid2con() before or after sock_lock is acquired. Another issue are missing locks in for_conn() iteration. Maybe this works fine because for_conn() is running in a context where connection_hash cannot be manipulated by others anymore. However this patch changes the connection_hash to be protected by sleepable rcu. The hotpath function __find_con() is implemented lockless as it is only a reader of connection_hash and this hopefully fixes the circular locking dependencies. The iteration for_conn() will still call some sleepable functionality, that's why we use sleepable rcu in this case. This patch removes the kmemcache functionality as I think I need to make some free() functionality via call_rcu(). However allocation time isn't here an issue. The dlm_allow_con will not be protected by a lock anymore as I think it's enough to just set and flush workqueues afterwards. Signed-off-by: Alexander Aring <aahringo@redhat.com> Signed-off-by: David Teigland <teigland@redhat.com> |
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| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| 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.