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18b8144a1b
Now the tg->[bytes/io]_disp type is signed, and calculate_bytes/io_allowed return type is unsigned. Even if the bps/iops limit is not set to max, the return value of the function may still exceed INT_MAX or LLONG_MAX, which can cause overflow in outer variables. In such cases, we can add additional checks accordingly. And in throtl_trim_slice(), if the BPS/IOPS limit is set to max, there's no need to call calculate_bytes/io_allowed(). Introduces the helper functions throtl_trim_bps/iops to simplifies the process. For cases when the calculated trim value exceeds INT_MAX (causing an overflow), we reset tg->[bytes/io]_disp to zero, so return original tg->[bytes/io]_disp because it is the size that is actually trimmed. Signed-off-by: Zizhi Wo <wozizhi@huawei.com> Reviewed-by: Yu Kuai <yukuai3@huawei.com> Link: https://lore.kernel.org/r/20250417132054.2866409-4-wozizhi@huaweicloud.com Signed-off-by: Jens Axboe <axboe@kernel.dk> |
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| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .clippy.toml | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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.