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1a783057b7
alloc_trial_cpuset missed allocation of the alloc_trial_cpuset
field which caused it to be shared from the base cs provided.
Once update_cpumask parsed buf into cpus_requested and updated
cpus_allowed, the result were never written to cs because
cs and trialcs shared the same pointer to cpus_requested and
cpus_requested always matched to itself and no updates were
written. This caused cpus_requested to be non-empty and
cpus_allowed empty.
This issue occurs only with CONFIG_CPUMASK_OFFSTACK enabled
(e.g. via CONFIG_MAXSMP).
Bug: 134051784
Bug: 120444281
Fixes: 4803def4e0b2 ("ANDROID: cpuset: Make cpusets restore on hotplug")
Test: enable CONFIG_CPUSETS, boot and check logcat that
Test: libprocessgroup does not fail with something similar to
Test: AddTidToCgroup failed to write '2354'; fd=93: No space left on device
Signed-off-by: Roman Kiryanov <rkir@google.com>
Change-Id: I866836b5c0acfde8349c250a510ee89d8d37cb8e
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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.