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Linux kernel source tree
105c8c4214
The values of level are bounded and fit into a byte so let's use it for
the structure to reduce size from 88 to 80 bytes on a release build,
which increases number of objects in the default 8K slab from 93 to 102.
struct prelim_ref {
struct rb_node rbnode __attribute__((__aligned__(8))); /* 0 24 */
u64 root_id; /* 24 8 */
struct btrfs_key key_for_search; /* 32 17 */
u8 level; /* 49 1 */
/* XXX 2 bytes hole, try to pack */
int count; /* 52 4 */
struct extent_inode_elem * inode_list; /* 56 8 */
/* --- cacheline 1 boundary (64 bytes) --- */
u64 parent; /* 64 8 */
u64 wanted_disk_byte; /* 72 8 */
/* size: 80, cachelines: 2, members: 8 */
/* sum members: 78, holes: 1, sum holes: 2 */
/* forced alignments: 1 */
/* last cacheline: 16 bytes */
} __attribute__((__aligned__(8)));
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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| arch | ||
| 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 | ||
| .cocciconfig | ||
| .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 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.