diff options
Diffstat (limited to 'include/trace/events/kmem.h')
| -rw-r--r-- | include/trace/events/kmem.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/include/trace/events/kmem.h b/include/trace/events/kmem.h index 69e8bb8963db..ad7e642bd497 100644 --- a/include/trace/events/kmem.h +++ b/include/trace/events/kmem.h @@ -316,6 +316,53 @@ TRACE_EVENT(mm_page_alloc_extfrag, __entry->change_ownership) ); +/* + * Required for uniquely and securely identifying mm in rss_stat tracepoint. + */ +#ifndef __PTR_TO_HASHVAL +static unsigned int __maybe_unused mm_ptr_to_hash(const void *ptr) +{ + int ret; + unsigned long hashval; + + ret = ptr_to_hashval(ptr, &hashval); + if (ret) + return 0; + + /* The hashed value is only 32-bit */ + return (unsigned int)hashval; +} +#define __PTR_TO_HASHVAL +#endif + +TRACE_EVENT(rss_stat, + + TP_PROTO(struct mm_struct *mm, + int member, + long count), + + TP_ARGS(mm, member, count), + + TP_STRUCT__entry( + __field(unsigned int, mm_id) + __field(unsigned int, curr) + __field(int, member) + __field(long, size) + ), + + TP_fast_assign( + __entry->mm_id = mm_ptr_to_hash(mm); + __entry->curr = !!(current->mm == mm); + __entry->member = member; + __entry->size = (count << PAGE_SHIFT); + ), + + TP_printk("mm_id=%u curr=%d member=%d size=%ldB", + __entry->mm_id, + __entry->curr, + __entry->member, + __entry->size) + ); #endif /* _TRACE_KMEM_H */ /* This part must be outside protection */ |