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It is possible to eliminate contention between subsystems when updating/flushing stats by using subsystem-specific locks. Let the existing rstat locks be dedicated to the cgroup base stats and rename them to reflect that. Add similar locks to the cgroup_subsys struct for use with individual subsystems. Lock initialization is done in the new function ss_rstat_init(ss) which replaces cgroup_rstat_boot(void). If NULL is passed to this function, the global base stat locks will be initialized. Otherwise, the subsystem locks will be initialized. Change the existing lock helper functions to accept a reference to a css. Then within these functions, conditionally select the appropriate locks based on the subsystem affiliation of the given css. Add helper functions for this selection routine to avoid repeated code. Signed-off-by: JP Kobryn <inwardvessel@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org> |
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| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
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| lib | ||
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| 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 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.