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The current allocation scheme tries to allocate from the per CPU pool first. If that fails it allocates one object from the global pool and then refills the per CPU pool from the global pool. That is in the way of switching the pool management to batch mode as the global pool needs to be a strict stack of batches, which does not allow to allocate single objects. Rework the code to refill the per CPU pool first and then allocate the object from the refilled batch. Also try to allocate from the to free pool first to avoid freeing and reallocating objects. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Zhen Lei <thunder.leizhen@huawei.com> Link: https://lore.kernel.org/all/20241007164913.893554162@linutronix.de
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.