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| author | Christian Brauner <brauner@kernel.org> | 2025-04-02 16:07:34 +0200 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2025-05-09 12:41:23 +0200 |
| commit | ef2ed04eba999b13096ace4fafc2e7ed04176950 (patch) | |
| tree | b5a76542ad235152d8f2a55f2932aceff7c4436b /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | eacfbf74196f91e4c26d9f8c78e1576c1225cd8c (diff) | |
kernfs: add warning about implementing freeze/thaw
Sysfs is built on top of kernfs and sysfs provides the power management
infrastructure to support suspend/hibernate by writing to various files
in /sys/power/. As filesystems may be automatically frozen during
suspend/hibernate implementing freeze/thaw support for kernfs
generically will cause deadlocks as the suspending/hibernation
initiating task will hold a VFS lock that it will then wait upon to be
released. If freeze/thaw for kernfs is needed talk to the VFS.
Link: https://lore.kernel.org/r/20250402-work-freeze-v2-4-6719a97b52ac@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions