diff options
| author | Uladzislau Rezki (Sony) <urezki@gmail.com> | 2022-10-18 21:10:49 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-11-09 04:37:17 +0300 |
| commit | fabc27f7649e070c4f6c742e436a51ff68c4a280 (patch) | |
| tree | e81d8aa320414cead730ced5ef85a1eb192879b1 /include | |
| parent | b3a5a7b099162e1b11db459f8128d4374f7d1c05 (diff) | |
| download | linux-fabc27f7649e070c4f6c742e436a51ff68c4a280.tar.xz | |
mm: vmalloc: add free_vmap_area_noflush trace event
This event is used in order to validate/debug a start address of freed VA,
number of currently outstanding and maximum allowed areas.
Link: https://lkml.kernel.org/r/20221018181053.434508-4-urezki@gmail.com
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Oleksiy Avramchenko <oleksiy.avramchenko@sony.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/trace/events/vmalloc.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/include/trace/events/vmalloc.h b/include/trace/events/vmalloc.h index afeb8003a0f2..ad4e02191f35 100644 --- a/include/trace/events/vmalloc.h +++ b/include/trace/events/vmalloc.h @@ -83,6 +83,40 @@ TRACE_EVENT(purge_vmap_area_lazy, __entry->start, __entry->end, __entry->npurged) ); +/** + * free_vmap_area_noflush - called when a vmap area is freed + * @va_start: a start address of VA + * @nr_lazy: number of current lazy pages + * @nr_lazy_max: number of maximum lazy pages + * + * This event is used for a debug purpose. It gives some + * indication about a VA that is released, number of current + * outstanding areas and a maximum allowed threshold before + * dropping all of them. + */ +TRACE_EVENT(free_vmap_area_noflush, + + TP_PROTO(unsigned long va_start, unsigned long nr_lazy, + unsigned long nr_lazy_max), + + TP_ARGS(va_start, nr_lazy, nr_lazy_max), + + TP_STRUCT__entry( + __field(unsigned long, va_start) + __field(unsigned long, nr_lazy) + __field(unsigned long, nr_lazy_max) + ), + + TP_fast_assign( + __entry->va_start = va_start; + __entry->nr_lazy = nr_lazy; + __entry->nr_lazy_max = nr_lazy_max; + ), + + TP_printk("va_start=0x%lx nr_lazy=%lu nr_lazy_max=%lu", + __entry->va_start, __entry->nr_lazy, __entry->nr_lazy_max) +); + #endif /* _TRACE_VMALLOC_H */ /* This part must be outside protection */ |