+ mm-cma-add-available-count-and-total-count-to-trace_cma_alloc_start.patch added to mm-new branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: mm/cma: add 'available count' and 'total count' to trace_cma_alloc_start
has been added to the -mm mm-new branch.  Its filename is
     mm-cma-add-available-count-and-total-count-to-trace_cma_alloc_start.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-cma-add-available-count-and-total-count-to-trace_cma_alloc_start.patch

This patch will later appear in the mm-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews.  Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.

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------------------------------------------------------
From: Xiang Gao <gxxa03070307@gmail.com>
Subject: mm/cma: add 'available count' and 'total count' to trace_cma_alloc_start
Date: Thu, 21 Aug 2025 06:38:55 +0800


This makes cma info more intuitive during debugging.

Show up in the trace as:

	279.814717: cma_alloc_start: name=reserved request_count=4 available_count=8096 total_count=8192 align=0
	309.790580: cma_alloc_start: name=reserved request_count=4 available_count=8092 total_count=8192 align=0
	317.046609: cma_alloc_start: name=reserved request_count=4 available_count=8088 total_count=8192 align=0

Link: https://lkml.kernel.org/r/8a79284879c529f467478552825154b018076e95.1755729178.git.gaoxiang17@xiaomi.com
Signed-off-by: gaoxiang17 <gaoxiang17@xiaomi.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/trace/events/cma.h |   19 +++++++++++++------
 mm/cma.c                   |    2 +-
 2 files changed, 14 insertions(+), 7 deletions(-)

--- a/include/trace/events/cma.h~mm-cma-add-available-count-and-total-count-to-trace_cma_alloc_start
+++ a/include/trace/events/cma.h
@@ -38,25 +38,32 @@ TRACE_EVENT(cma_release,
 
 TRACE_EVENT(cma_alloc_start,
 
-	TP_PROTO(const char *name, unsigned long count, unsigned int align),
+	TP_PROTO(const char *name, unsigned long request_count, unsigned long available_count,
+		unsigned long total_count, unsigned int align),
 
-	TP_ARGS(name, count, align),
+	TP_ARGS(name, request_count, available_count, total_count, align),
 
 	TP_STRUCT__entry(
 		__string(name, name)
-		__field(unsigned long, count)
+		__field(unsigned long, request_count)
+		__field(unsigned long, available_count)
+		__field(unsigned long, total_count)
 		__field(unsigned int, align)
 	),
 
 	TP_fast_assign(
 		__assign_str(name);
-		__entry->count = count;
+		__entry->request_count = request_count;
+		__entry->available_count = available_count;
+		__entry->total_count = total_count;
 		__entry->align = align;
 	),
 
-	TP_printk("name=%s count=%lu align=%u",
+	TP_printk("name=%s request_count=%lu available_count=%lu total_count=%lu align=%u",
 		  __get_str(name),
-		  __entry->count,
+		  __entry->request_count,
+		  __entry->available_count,
+		  __entry->total_count,
 		  __entry->align)
 );
 
--- a/mm/cma.c~mm-cma-add-available-count-and-total-count-to-trace_cma_alloc_start
+++ a/mm/cma.c
@@ -864,7 +864,7 @@ static struct page *__cma_alloc(struct c
 	if (!count)
 		return page;
 
-	trace_cma_alloc_start(name, count, align);
+	trace_cma_alloc_start(name, count, cma->available_count, cma->count, align);
 
 	for (r = 0; r < cma->nranges; r++) {
 		page = NULL;
_

Patches currently in -mm which might be from gxxa03070307@gmail.com are

mm-cma-add-available-count-and-total-count-to-trace_cma_alloc_start.patch