For those just joining in, this series adds a new top-level "ref_tracker" debugfs directory, and has each ref_tracker_dir register a file in there as part of its initialization. It also adds the ability to register a symlink with a more human-usable name that points to the file, and does some general cleanup of how the ref_tracker object names are handled.
Jakub pointed out that I hadn't gotten the xarray locking correct on the last set [1]. This version should fix that: [1]: https://lore.kernel.org/netdev/[email protected]/ Signed-off-by: Jeff Layton <[email protected]> --- Changes in v15: - fix xa_lock handling to be IRQ safe - Link to v14: https://lore.kernel.org/r/[email protected] Changes in v14: - Clean up dentries asynchronously after ref_tracker_dir_exit() - Link to v13: https://lore.kernel.org/r/[email protected] Changes in v13: - drop i915 patch - Link to v12: https://lore.kernel.org/r/[email protected] Changes in v12: - drop redundant pr_warn() calls. Debugfs already warns when these ops fail - Link to v11: https://lore.kernel.org/r/[email protected] Changes in v11: - don't call ref_tracker_dir_init() more than once for same i915 objects - use %llx in format for net_cookie in symlink name - Link to v10: https://lore.kernel.org/r/[email protected] Changes in v10: - drop the i915 symlink patch - Link to v9: https://lore.kernel.org/r/[email protected] Changes in v9: - fix typo in ref_tracker_dir_init() kerneldoc header - Link to v8: https://lore.kernel.org/r/[email protected] Changes in v8: - fix up compiler warnings that the KTR warned about - ensure builds with CONFIG_DEBUG_FS=n and CONFIG_REF_TRACKER=y work - Link to v7: https://lore.kernel.org/r/[email protected] Changes in v7: - include net->net_cookie in netns symlink name - add __ostream_printf to ref_tracker_dir_symlink() stub function - remove unneeded #include of seq_file.h - Link to v6: https://lore.kernel.org/r/[email protected] Changes in v6: - clean up kerneldoc comment for ref_tracker_dir_debugfs() - add missing stub function for ref_tracker_dir_symlink() - temporary __maybe_unused on ref_tracker_dir_seq_print() to silence compiler warning - Link to v5: https://lore.kernel.org/r/[email protected] Changes in v5: - add class string to each ref_tracker_dir - auto-register debugfs file for every tracker in ref_tracker_dir_init - add function to allow adding a symlink for each tracker - add patches to create symlinks for netns's and i915 entries - change output format to print class@%p instead of name@%p - eliminate the name field in ref_tracker_dir - fix off-by-one bug when NULL terminating name string - Link to v4: https://lore.kernel.org/r/[email protected] Changes in v4: - Drop patch to widen ref_tracker_dir_.name, use NAME_MAX+1 (256) instead since this only affects dentry name - Link to v3: https://lore.kernel.org/r/[email protected] Changes in v3: - don't overwrite dir->name in ref_tracker_dir_debugfs - define REF_TRACKER_NAMESZ and use it when setting name - Link to v2: https://lore.kernel.org/r/[email protected] Changes in v2: - Add patch to do %pK -> %p conversion in ref_tracker.c - Pass in output function to pr_ostream() instead of if statement - Widen ref_tracker_dir.name to 64 bytes to accomodate unique names - Eliminate error handling with debugfs manipulation - Incorporate pointer value into netdev name - Link to v1: https://lore.kernel.org/r/[email protected] --- Jeff Layton (9): ref_tracker: don't use %pK in pr_ostream() output ref_tracker: add a top level debugfs directory for ref_tracker ref_tracker: have callers pass output function to pr_ostream() ref_tracker: add a static classname string to each ref_tracker_dir ref_tracker: allow pr_ostream() to print directly to a seq_file ref_tracker: automatically register a file in debugfs for a ref_tracker_dir ref_tracker: add a way to create a symlink to the ref_tracker_dir debugfs file net: add symlinks to ref_tracker_dir for netns ref_tracker: eliminate the ref_tracker_dir name field drivers/gpu/drm/display/drm_dp_tunnel.c | 2 +- drivers/gpu/drm/i915/intel_runtime_pm.c | 4 +- drivers/gpu/drm/i915/intel_wakeref.c | 3 +- include/linux/ref_tracker.h | 50 +++++- lib/ref_tracker.c | 283 ++++++++++++++++++++++++++++++-- net/core/dev.c | 2 +- net/core/net_namespace.c | 34 +++- 7 files changed, 352 insertions(+), 26 deletions(-) --- base-commit: 8630c59e99363c4b655788fd01134aef9bcd9264 change-id: 20250413-reftrack-dbgfs-3767b303e2fa Best regards, -- Jeff Layton <[email protected]>
