aleph/lkl_linux
1
0
Fork 0
mirror of https://github.com/lkl/linux.git synced 2025-12-19 16:13:19 +09:00
Code Issues Packages Projects Releases Wiki Activity

mm: vmalloc: add free_vmap_area_noflush trace event

Browse Source 
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>
This commit is contained in:
Uladzislau Rezki (Sony)
2022-10-18 20:10:49 +02:00
committed by Andrew Morton
parent b3a5a7b099
commit fabc27f764
1 changed files with 34 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

34
include/trace/events/vmalloc.h
View File

@@ -83,6 +83,40 @@ TRACE_EVENT(purge_vmap_area_lazy,
__entry->start, __entry->end, __entry->npurged) __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 */ #endif /* _TRACE_VMALLOC_H */
/* This part must be outside protection */ /* This part must be outside protection */