The patch titled
Subject: mm: vmalloc: use trace_alloc_vmap_area event
has been added to the -mm mm-unstable branch. Its filename is
mm-vmalloc-use-trace_alloc_vmap_area-event.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-vmalloc-use-trace_alloc_vmap_area-event.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: "Uladzislau Rezki (Sony)" <urezki@xxxxxxxxx>
Subject: mm: vmalloc: use trace_alloc_vmap_area event
Date: Tue, 18 Oct 2022 20:10:50 +0200
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@xxxxxxxxx
Signed-off-by: Uladzislau Rezki (Sony) <urezki@xxxxxxxxx>
Reviewed-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Nicholas Piggin <npiggin@xxxxxxxxx>
Cc: Oleksiy Avramchenko <oleksiy.avramchenko@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmalloc.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/mm/vmalloc.c~mm-vmalloc-use-trace_alloc_vmap_area-event
+++ a/mm/vmalloc.c
@@ -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 @@ retry:
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.
_
Patches currently in -mm which might be from urezki@xxxxxxxxx are
mm-vmalloc-add-alloc_vmap_area-trace-event.patch
mm-vmalloc-add-purge_vmap_area_lazy-trace-event.patch
mm-vmalloc-add-free_vmap_area_noflush-trace-event.patch
mm-vmalloc-use-trace_alloc_vmap_area-event.patch
mm-vmalloc-use-trace_purge_vmap_area_lazy-event.patch
mm-vmalloc-use-trace_free_vmap_area_noflush-event.patch
vmalloc-add-reviewers-for-vmalloc-code.patch
