Commit cf243da6 authored by Uladzislau Rezki (Sony)'s avatar Uladzislau Rezki (Sony) Committed by Andrew Morton
Browse files

mm: vmalloc: use trace_alloc_vmap_area event 

This is for debug purpose and is called when an allocation attempt occurs.
This event gives some information about:

- start address of allocated area;
- size that is requested;
- alignment that is required;
- vstart/vend restriction;
- if an allocation fails.

Link: https://lkml.kernel.org/r/20221018181053.434508-5-urezki@gmail.com


Signed-off-by: default avatarUladzislau Rezki (Sony) <urezki@gmail.com>
Reviewed-by: default avatarSteven Rostedt (Google) <rostedt@goodmis.org>
Reviewed-by: default avatarChristoph 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: default avatarAndrew Morton <akpm@linux-foundation.org>
parent fabc27f7

mm/vmalloc.c

+5 −0
Original line number Diff line number Diff line
@@ -43,6 +43,9 @@ 
#include <asm/tlbflush.h>

#include <asm/shmparam.h>



#define CREATE_TRACE_POINTS

#include <trace/events/vmalloc.h>



#include "internal.h"

#include "pgalloc-track.h"
@@ -1620,6 +1623,8 @@ static struct vmap_area *alloc_vmap_area(unsigned long size, 
		size, align, vstart, vend);

	spin_unlock(&free_vmap_area_lock);



	trace_alloc_vmap_area(addr, size, align, vstart, vend, addr == vend);



	/*

	 * If an allocation fails, the "vend" address is

	 * returned. Therefore trigger the overflow path.