200e340f21
sure preemption is disabled in start_dir_add()/ end_dir_add() sections (on non-RT it's automatic, on RT it needs to to be done explicitly) and moving wakeups from __d_lookup_done() inside of such to the end of those sections. Wakeups can be safely delayed for as long as ->d_lock on in-lookup dentry is held; proving that has caught a bug in d_add_ci() that allows memory corruption when sufficiently bogus ntfs (or case-insensitive xfs) image is mounted. Easily fixed, fortunately. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQQqUNBr3gm4hGXdBJlZ7Krx/gZQ6wUCYurAlAAKCRBZ7Krx/gZQ 6x0mAP9JI80PC/lkYLda+AJ7NmweorBDwrOxzB34biXtyhYDDQEAvdrV07LUkETM FDN0+jgSpUikcs/kz5NxVBPRRN+RRAY= =qpTA -----END PGP SIGNATURE----- Merge tag 'pull-work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs dcache updates from Al Viro: "The main part here is making parallel lookups safe for RT - making sure preemption is disabled in start_dir_add()/ end_dir_add() sections (on non-RT it's automatic, on RT it needs to to be done explicitly) and moving wakeups from __d_lookup_done() inside of such to the end of those sections. Wakeups can be safely delayed for as long as ->d_lock on in-lookup dentry is held; proving that has caught a bug in d_add_ci() that allows memory corruption when sufficiently bogus ntfs (or case-insensitive xfs) image is mounted. Easily fixed, fortunately" * tag 'pull-work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: fs/dcache: Move wakeup out of i_seq_dir write held region. fs/dcache: Move the wakeup from __d_lookup_done() to the caller. fs/dcache: Disable preemption on i_dir_seq write side on PREEMPT_RT d_add_ci(): make sure we don't miss d_lookup_done() |
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| 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.