diff options
| author | Uladzislau Rezki (Sony) <urezki@gmail.com> | 2022-10-18 20:10:52 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-11-08 17:37:17 -0800 |
| commit | 8c4196fe810a6717a8f9e528083911703f6a5a51 (patch) | |
| tree | 4508ad77427bd60790437c9b5ca73c430bd4a701 /mm/vmalloc.c | |
| parent | 6030fd5fd1f7baaac3661a5301cc7838d4e3b7f6 (diff) | |
| download | linux-8c4196fe810a6717a8f9e528083911703f6a5a51.tar.bz2 | |
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.c | 6 |
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); } |