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This allocation is really spurious. The size of the bitmap is 'tot_ids' and it is used as such in the driver. So we could expect something like: table->id_bmap = devm_kcalloc(rvu->dev, BITS_TO_LONGS(table->tot_ids), sizeof(long), GFP_KERNEL); However, when the bitmap is allocated, we allocate: BITS_TO_LONGS(table->tot_ids) * table->tot_ids ~= table->tot_ids / 32 * table->tot_ids ~= table->tot_ids^2 / 32 It is proportional to the square of 'table->tot_ids' which seems to potentially be big. Allocate the expected amount of memory, and switch to the bitmap API to have it more straightforward. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Link: https://lore.kernel.org/r/ce2710771939065d68f95d86a27cf7cea7966365.1669378798.git.christophe.jaillet@wanadoo.fr Signed-off-by: Jakub Kicinski <kuba@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 Restructured Text 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.