mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/
synced 2026-11-10 20:48:12 +00:00
No description
- C 96.8%
- Assembly 0.9%
- Rust 0.7%
- Shell 0.6%
- Python 0.5%
- Other 0.3%
81fbc5f930
These patches fix a few problems that I noticed in the code that deals with old btree blocks after a successful repair. First, I observed that it is possible for repair to incorrectly invalidate and delete old btree blocks if they were crosslinked. The solution here is to consult the reverse mappings for each block in the extent -- singly owned blocks are invalidated and freed, whereas for crosslinked blocks, we merely drop the incorrect reverse mapping. A largeish change in this patchset is moving the reaping code to a separate file, because the code are mostly interrelated static functions. For now this also drops the ability to reap file blocks, which will return when we add the bmbt repair functions. Second, we convert the reap function to use EFIs so that we can commit to freeing as many blocks in as few transactions as we dare. We would like to free as many old blocks as we can in the same transaction that commits the new structure to the ondisk filesystem to minimize the number of blocks that leak if the system crashes before the repair fully completes. The third change made in this series is to avoid tripping buffer cache assertions if we're merely scanning the buffer cache for buffers to invalidate, and find a non-stale buffer of the wrong length. This is primarily cosmetic, but makes my life easier. The fourth change restructures the reaping code to try to process as many blocks in one go as possible, to reduce logging traffic. The last change switches the reaping mechanism to use per-AG bitmaps defined in a previous patchset. This should reduce type confusion when reading the source code. This has been running on the djcloud for years with no problems. Enjoy! Signed-off-by: Darrick J. Wong <djwong@kernel.org> -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQQ2qTKExjcn+O1o2YRKO3ySh0YRpgUCZNT+WAAKCRBKO3ySh0YR pt1nAQDn4pjj8ugmH3mcbwE6pqOde52xvApWD6HM2gz7CJa17gEAyGNQu2tw8I15 MJ15sGUq6LaNWBF5kZjLt3qpWykoLgk= =sVzo -----END PGP SIGNATURE----- Merge tag 'repair-reap-fixes-6.6_2023-08-10' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux into xfs-6.6-mergeA xfs: fix online repair block reaping These patches fix a few problems that I noticed in the code that deals with old btree blocks after a successful repair. First, I observed that it is possible for repair to incorrectly invalidate and delete old btree blocks if they were crosslinked. The solution here is to consult the reverse mappings for each block in the extent -- singly owned blocks are invalidated and freed, whereas for crosslinked blocks, we merely drop the incorrect reverse mapping. A largeish change in this patchset is moving the reaping code to a separate file, because the code are mostly interrelated static functions. For now this also drops the ability to reap file blocks, which will return when we add the bmbt repair functions. Second, we convert the reap function to use EFIs so that we can commit to freeing as many blocks in as few transactions as we dare. We would like to free as many old blocks as we can in the same transaction that commits the new structure to the ondisk filesystem to minimize the number of blocks that leak if the system crashes before the repair fully completes. The third change made in this series is to avoid tripping buffer cache assertions if we're merely scanning the buffer cache for buffers to invalidate, and find a non-stale buffer of the wrong length. This is primarily cosmetic, but makes my life easier. The fourth change restructures the reaping code to try to process as many blocks in one go as possible, to reduce logging traffic. The last change switches the reaping mechanism to use per-AG bitmaps defined in a previous patchset. This should reduce type confusion when reading the source code. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Chandan Babu R <chandan.babu@oracle.com> * tag 'repair-reap-fixes-6.6_2023-08-10' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux: xfs: use per-AG bitmaps to reap unused AG metadata blocks during repair xfs: reap large AG metadata extents when possible xfs: allow scanning ranges of the buffer cache for live buffers xfs: rearrange xrep_reap_block to make future code flow easier xfs: use deferred frees to reap old btree blocks xfs: only allow reaping of per-AG blocks in xrep_reap_extents xfs: only invalidate blocks if we're going to free them xfs: move the post-repair block reaping code to a separate file xfs: cull repair code that will never get used |
History
|
|
|---|---|---|
| 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.