Commit 3c0c9bc9 authored by Uladzislau Rezki (Sony)'s avatar Uladzislau Rezki (Sony) Committed by Andrew Morton
Browse files

mm: vmalloc: add alloc_vmap_area trace event 

Patch series "Add basic trace events for vmap/vmalloc (v2)", v2.

This small series add some basic trace events for the vmap/vmalloc code. 
Since currently we lack any, sometimes it is hard to start debuging vmap
code if an issue is reported or occured.

For example https://lore.kernel.org/linux-mm/Y0p8BZIiDXLQbde%2F@pc636/T/

The final patch adds two reviewers for vmalloc code.


This patch (of 7):

It is for debug purposes and for validation of passed parameters.

Link: https://lkml.kernel.org/r/20221018181053.434508-1-urezki@gmail.com
Link: https://lkml.kernel.org/r/20221018181053.434508-2-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 1eeaa4fd

include/trace/events/vmalloc.h

0 → 100644
+56 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */

#undef TRACE_SYSTEM

#define TRACE_SYSTEM vmalloc



#if !defined(_TRACE_VMALLOC_H) || defined(TRACE_HEADER_MULTI_READ)

#define _TRACE_VMALLOC_H



#include <linux/tracepoint.h>



/**

 * alloc_vmap_area - called when a new vmap allocation occurs

 * @addr:	an allocated address

 * @size:	a requested size

 * @align:	a requested alignment

 * @vstart:	a requested start range

 * @vend:	a requested end range

 * @failed:	an allocation failed or not

 *

 * This event is used for a debug purpose, it can give an extra

 * information for a developer about how often it occurs and which

 * parameters are passed for further validation.

 */

TRACE_EVENT(alloc_vmap_area,



	TP_PROTO(unsigned long addr, unsigned long size, unsigned long align,

		unsigned long vstart, unsigned long vend, int failed),



	TP_ARGS(addr, size, align, vstart, vend, failed),



	TP_STRUCT__entry(

		__field(unsigned long, addr)

		__field(unsigned long, size)

		__field(unsigned long, align)

		__field(unsigned long, vstart)

		__field(unsigned long, vend)

		__field(int, failed)

	),



	TP_fast_assign(

		__entry->addr = addr;

		__entry->size = size;

		__entry->align = align;

		__entry->vstart = vstart;

		__entry->vend = vend;

		__entry->failed = failed;

	),



	TP_printk("va_start: %lu size=%lu align=%lu vstart=0x%lx vend=0x%lx failed=%d",

		__entry->addr, __entry->size, __entry->align,

		__entry->vstart, __entry->vend, __entry->failed)

);



#endif /*  _TRACE_VMALLOC_H */



/* This part must be outside protection */

#include <trace/define_trace.h>