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Christian Brauner <brauner@kernel.org> says: I've recently looked for some free space in struct inode again because of some exec kerfuffle we had and while my idea didn't turn into anything I noticed that we often waste bytes when using wait bit operations. So I set out to switch that to another mechanism that would allow us to free up bytes. So this is an attempt to turn i_state from an unsigned long into an u32 using the individual bytes of i_state as addresses for the wait var event mechanism (Thanks to Linus for that idea.). This survives LTP, xfstests on various filesystems, and will-it-scale. * patches from https://lore.kernel.org/r/20240823-work-i_state-v3-1-5cd5fd207a57@kernel.org: inode: make i_state a u32 inode: port __I_LRU_ISOLATING to var event inode: port __I_NEW to var event inode: port __I_SYNC to var event fs: reorder i_state bits fs: add i_state helpers Link: https://lore.kernel.org/r/20240823-work-i_state-v3-1-5cd5fd207a57@kernel.org Signed-off-by: Christian Brauner <brauner@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 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.