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module/sched: Make SchedModule probing more accurate

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Right now, this module won't be loaded if the sched_domain procfs
entries are not present on the target. However, other pieces of
information may be present in which case it would make sense to load
the module.

For instance, mainline kernels compiled without SCHED_DEBUG can still
expose the cpu_capacity sysfs entry. As such, try to get a better idea
of what's available and only disable the loading of the module if it
can provide absolutely nothing.
This commit is contained in:
Valentin Schneider 2019-07-09 14:56:57 +01:00 committed by Marc Bonnici
parent 03a469fc38
commit 984556bc8e
1 changed files with 15 additions and 1 deletions
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16
devlib/module/sched.py
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@ -259,7 +259,21 @@ class SchedModule(Module):
logger = logging.getLogger(SchedModule.name)
SchedDomainFlag.check_version(target, logger)
return SchedProcFSData.available(target)
# It makes sense to load this module if at least one of those
# functionalities is enabled
schedproc = SchedProcFSData.available(target)
debug = SchedModule.target_has_debug(target)
dmips = any([target.file_exists(SchedModule.cpu_dmips_capacity_path(target, cpu))
for cpu in target.list_online_cpus()])
logger.info("Scheduler sched_domain procfs entries %s",
"found" if schedproc else "not found")
logger.info("Detected kernel compiled with SCHED_DEBUG=%s",
"y" if debug else "n")
logger.info("CPU capacity sysfs entries %s",
"found" if dmips else "not found")
return schedproc or debug or dmips
def get_kernel_attributes(self, matching=None, check_exit_code=True):
"""