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68d20eb60e
The zram_table_entry::flags member is of type long and uses 8 bytes on a 64bit architecture. With a PAGE_SIZE of 256KiB we have PAGE_SHIFT of 18 which in turn leads to __NR_ZRAM_PAGEFLAGS = 27. This still fits in an ordinary integer. By reducing the size of `flags' to four bytes, the size of the struct goes back to 16 bytes. The padding between the lock and ac_time (if enabled) is also gone. Make zram_table_entry::flags an unsigned int and update the build test to reflect the change. Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Reviewed-by: Jens Axboe <axboe@kernel.dk> Link: https://lore.kernel.org/r/20240906141520.730009-4-bigeasy@linutronix.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
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.