diff options
Diffstat (limited to 'include/trace/events/kmem.h')
| -rw-r--r-- | include/trace/events/kmem.h | 32 |
1 files changed, 29 insertions, 3 deletions
diff --git a/include/trace/events/kmem.h b/include/trace/events/kmem.h index 5a0666bfcf85..ad7e642bd497 100644 --- a/include/trace/events/kmem.h +++ b/include/trace/events/kmem.h @@ -316,24 +316,50 @@ 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(int member, + TP_PROTO(struct mm_struct *mm, + int member, long count), - TP_ARGS(member, 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("member=%d size=%ldB", + TP_printk("mm_id=%u curr=%d member=%d size=%ldB", + __entry->mm_id, + __entry->curr, __entry->member, __entry->size) ); |