mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-05-10 02:12:00 -04:00
0366017e09
When deciding whether a task can be migrated to a CPU, dispatch_to_local_dsq() was open-coding p->cpus_allowed and scx_rq_online() tests instead of using task_can_run_on_remote_rq(). This had two problems. - It was missing is_migration_disabled() check and thus could try to migrate a task which shouldn't leading to assertion and scheduling failures. - It was testing p->cpus_ptr directly instead of using task_allowed_on_cpu() and thus failed to consider ISA compatibility. Update dispatch_to_local_dsq() to use task_can_run_on_remote_rq(): - Move scx_ops_error() triggering into task_can_run_on_remote_rq(). - When migration isn't allowed, fall back to the global DSQ instead of the source DSQ by returning DTL_INVALID. This is both simpler and an overall better behavior. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Acked-by: David Vernet <void@manifault.com>
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.