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182c7bbfbf
- With BCH_WRITE_SYNC, we no longer need the completion in struct dio_write - Pull out bch2_dio_write_copy_iov() into a separate non-inline function, it's code that doesn't run in the common case - Copy mapping and inode pointers into dio_write, avoiding pointer chasing at the start of bch2_dio_write_loop() - kthread_use_mm() is not needed in the common case; move it into bch2_dio_write_loop_async() - factor out various helpers from bch2_dio_write_loop() and rework control flow for better icache utilization Other small optimizations: - bch2_keylist_free() is only used in one place, at the end of the bch2_write() path - drop the reinit - in bch2_disk_reservation_put(), check if res->sectors is nonzero before touching c->online_reserved, since that will likely be a cache miss Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> bcachefs: More DIO write path optimization Better code prefetching (?) Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> |
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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 | ||
| .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.