f3d73b877a
[ Upstream commit 2a1b02bcba78f8498ab00d6142e1238d85b01591 ] Currently, worker ID formatting is open coded in create_worker(), init_rescuer() and worker_thread() (for %WORKER_DIE case). The formatted ID is saved into task->comm and wq_worker_comm() uses it as the base name to append extra information to when generating the name to be shown to userspace. However, TASK_COMM_LEN is only 16 leading to badly truncated names for rescuers. For example, the rescuer for the inet_frag_wq workqueue becomes: $ ps -ef | grep '[k]worker/R-inet' root 483 2 0 Apr26 ? 00:00:00 [kworker/R-inet_] Even for non-rescue workers, it's easy to run over 15 characters on moderately large machines. Fit it by consolidating worker ID formatting into a new helper format_worker_id() and calling it from wq_worker_comm() to obtain the untruncated worker ID string. $ ps -ef | grep '[k]worker/R-inet' root 60 2 0 12:10 ? 00:00:00 [kworker/R-inet_frag_wq] Signed-off-by: Tejun Heo <tj@kernel.org> Reported-and-tested-by: Jan Engelhardt <jengelh@inai.de> Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> 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 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.