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authorUladzislau Rezki (Sony) <urezki@gmail.com>2022-10-18 21:10:52 +0300
committerAndrew Morton <akpm@linux-foundation.org>2022-11-09 04:37:17 +0300
commit8c4196fe810a6717a8f9e528083911703f6a5a51 (patch)
tree4508ad77427bd60790437c9b5ca73c430bd4a701 /mm/vmalloc.c
parent6030fd5fd1f7baaac3661a5301cc7838d4e3b7f6 (diff)
downloadlinux-8c4196fe810a6717a8f9e528083911703f6a5a51.tar.xz
mm: vmalloc: use trace_free_vmap_area_noflush event
It is for debug purposes and is called when a vmap area gets freed. This event gives some indication about: - a start address of released area; - a current number of outstanding pages; - a maximum number of allowed outstanding pages. Link: https://lkml.kernel.org/r/20221018181053.434508-7-urezki@gmail.com Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com> Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org> Reviewed-by: Christoph 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: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/vmalloc.c')
-rw-r--r--mm/vmalloc.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 1b1205ade1cf..ca71de7c9d77 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1821,6 +1821,8 @@ static void drain_vmap_area_work(struct work_struct *work)
*/
static void free_vmap_area_noflush(struct vmap_area *va)
{
+ unsigned long nr_lazy_max = lazy_max_pages();
+ unsigned long va_start = va->va_start;
unsigned long nr_lazy;
spin_lock(&vmap_area_lock);
@@ -1838,8 +1840,10 @@ static void free_vmap_area_noflush(struct vmap_area *va)
&purge_vmap_area_root, &purge_vmap_area_list);
spin_unlock(&purge_vmap_area_lock);
+ trace_free_vmap_area_noflush(va_start, nr_lazy, nr_lazy_max);
+
/* After this point, we may free va at any time */
- if (unlikely(nr_lazy > lazy_max_pages()))
+ if (unlikely(nr_lazy > nr_lazy_max))
schedule_work(&drain_vmap_work);
}