Trace events take up to 5K in memory for text and meta data. I have code that will trigger a warning when it detects unused tracepoints[1]. The XFS file system contains many events that are not called. Most of them used to be called but due to code refactoring the calls were removed but the trace events stayed behind. Some events were added but never used. If they were recent, I just reported them, but if they were older, this series simply removes them. One is called only when CONFIG_COMPACT is defined, so an #ifdef was placed around it. Finally, one event is supposed to be a trace event class, but was created with the TRACE_EVENT() macro and not the DECLARE_EVENT_CLASS() macro. This works because a TRACE_EVENT() is simply a DECLARE_EVENT_CLASS() and DEFINE_EVENT() where the class and event have the same name. But as this was a mistake, the event created should not exist. [1] https://patchwork.kernel.org/project/linux-trace-kernel/cover/20250612235827.011358765@xxxxxxxxxxx/ Changes since v1: https://lore.kernel.org/linux-trace-kernel/20250612212405.877692069@xxxxxxxxxxx/ - Removed the first patch that mistakenly removed xfs_reflink_cow_found - Change subjects to start with lowercase - Removed xfs_attr events that are used in an #if 0 section instead of adding #if 0 around them - I added: Reviewed-by: Christoph Hellwig <hch@xxxxxx> to all patches but the one with the modified #if 0 as Christoph said he looked at them all. Steven Rostedt (13): xfs: remove unused trace event xfs_attr_remove_iter_return xfs: remove unused event xlog_iclog_want_sync xfs: remove unused event xfs_ioctl_clone xfs: remove unused xfs_reflink_compare_extents events xfs: remove unused trace event xfs_attr_rmtval_set xfs: remove unused xfs_attr events xfs: remove unused event xfs_attr_node_removename xfs: remove unused event xfs_alloc_near_error xfs: remove unused event xfs_alloc_near_nominleft xfs: remove unused event xfs_pagecache_inval xfs: remove usused xfs_end_io_direct events xfs: only create event xfs_file_compat_ioctl when CONFIG_COMPAT is configure xfs: change xfs_xattr_class from a TRACE_EVENT() to DECLARE_EVENT_CLASS() ---- fs/xfs/scrub/trace.h | 2 +- fs/xfs/xfs_trace.h | 68 ++-------------------------------------------------- 2 files changed, 3 insertions(+), 67 deletions(-)
