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* [RESEND 0/1] drm/buddy: release free_trees array on buddy mm teardown
@ 2025-12-08 10:27 Michał Grzelak
  2025-12-08 10:27 ` [RESEND 1/1] " Michał Grzelak
                   ` (3 more replies)
  0 siblings, 4 replies; 13+ messages in thread
From: Michał Grzelak @ 2025-12-08 10:27 UTC (permalink / raw)
  To: intel-xe, dri-devel
  Cc: Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann,
	Michał Grzelak

Rebase and resend of [1]. Fixes: tag has been corrected to point at the
valid commit. Previous CI issues were inspected with a delay, hence
the resend to re-trigger CI run.

BR,
Michał

[1] https://lore.kernel.org/intel-xe/20251129214740.3305249-1-michal.grzelak@intel.com

Michał Grzelak (1):
  drm/buddy: release free_trees array on buddy mm teardown

 drivers/gpu/drm/drm_buddy.c | 1 +
 1 file changed, 1 insertion(+)

-- 
2.45.2


^ permalink raw reply	[flat|nested] 13+ messages in thread
* [RESEND 1/1] drm/buddy: release free_trees array on buddy mm teardown
@ 2025-12-19 19:32 Michał Grzelak
  2025-12-19 20:38 ` Lin, Shuicheng
  2026-01-19 16:25 ` Matthew Auld
  0 siblings, 2 replies; 13+ messages in thread
From: Michał Grzelak @ 2025-12-19 19:32 UTC (permalink / raw)
  To: intel-xe, dri-devel
  Cc: matthew.brost, thomas.hellstrom, rodrigo.vivi,
	Michał Grzelak, Lucas De Marchi, Matthew Auld

During initialization of DRM buddy memory manager at drm_buddy_init,
mm->free_trees array is allocated for both clear and dirty RB trees.
During cleanup happening at drm_buddy_fini it is never freed, leading to
following memory leaks observed on xe module load & unload cycles:

    kmemleak_alloc+0x4a/0x90
    __kmalloc_cache_noprof+0x488/0x800
    drm_buddy_init+0xc2/0x330 [drm_buddy]
    __xe_ttm_vram_mgr_init+0xc3/0x190 [xe]
    xe_ttm_stolen_mgr_init+0xf5/0x9d0 [xe]
    xe_device_probe+0x326/0x9e0 [xe]
    xe_pci_probe+0x39a/0x610 [xe]
    local_pci_probe+0x47/0xb0
    pci_device_probe+0xf3/0x260
    really_probe+0xf1/0x3c0
    __driver_probe_device+0x8c/0x180
    driver_probe_device+0x24/0xd0
    __driver_attach+0x10f/0x220
    bus_for_each_dev+0x7f/0xe0
    driver_attach+0x1e/0x30
    bus_add_driver+0x151/0x290

Deallocate array for free trees when cleaning up buddy memory manager
in the same way as if going through out_free_tree label.

Fixes: d4cd665c98c1 ("drm/buddy: Separate clear and dirty free block trees")
Signed-off-by: Michał Grzelak <michal.grzelak@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
---
 drivers/gpu/drm/drm_buddy.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/drm_buddy.c b/drivers/gpu/drm/drm_buddy.c
index 2f279b46bd2c..8308116058cc 100644
--- a/drivers/gpu/drm/drm_buddy.c
+++ b/drivers/gpu/drm/drm_buddy.c
@@ -420,6 +420,7 @@ void drm_buddy_fini(struct drm_buddy *mm)
 
 	for_each_free_tree(i)
 		kfree(mm->free_trees[i]);
+	kfree(mm->free_trees);
 	kfree(mm->roots);
 }
 EXPORT_SYMBOL(drm_buddy_fini);
-- 
2.45.2


^ permalink raw reply related	[flat|nested] 13+ messages in thread

end of thread, other threads:[~2026-01-20 10:40 UTC | newest]

Thread overview: 13+ messages (download: mbox.gz follow: Atom feed
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2025-12-08 10:27 [RESEND 0/1] drm/buddy: release free_trees array on buddy mm teardown Michał Grzelak
2025-12-08 10:27 ` [RESEND 1/1] " Michał Grzelak
2025-12-08 14:16 ` ✓ CI.KUnit: success for drm/buddy: release free_trees array on buddy mm teardown (rev3) Patchwork
2025-12-08 15:17 ` ✓ Xe.CI.BAT: " Patchwork
2025-12-08 20:09 ` ✗ Xe.CI.Full: failure " Patchwork
2025-12-09 22:07   ` Michał Grzelak
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2025-12-19 19:32 [RESEND 1/1] drm/buddy: release free_trees array on buddy mm teardown Michał Grzelak
2025-12-19 20:38 ` Lin, Shuicheng
2025-12-23  7:35   ` Michał Grzelak
2025-12-23 17:14     ` Lin, Shuicheng
2026-01-19 16:25 ` Matthew Auld
2026-01-20  5:27   ` Arunpravin Paneer Selvam
2026-01-20 10:40     ` Matthew Auld

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