Re: [PATCH v2] drm/buddy: Fix the warn on's during force merge

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On 5/17/2024 7:30 PM, Matthew Auld wrote:
On 17/05/2024 14:50, Arunpravin Paneer Selvam wrote:
Move the fallback and block incompatible checks
above, so that we dont unnecessarily split the blocks
and leaving the unmerged. This resolves the unnecessary
warn on's thrown during force_merge call.

v2:(Matthew)
   - Move the fallback and block incompatible checks above
     the contains check.

Signed-off-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@xxxxxxx>
Fixes: 96950929eb23 ("drm/buddy: Implement tracking clear page feature")
Reviewed-by: Matthew Auld <matthew.auld@xxxxxxxxx>

A follow up unit test to catch this edge case would be lovely.
Yes, I will follow up on this.

Thanks,
Arun.

---
  drivers/gpu/drm/drm_buddy.c | 6 +++---
  1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/drm_buddy.c b/drivers/gpu/drm/drm_buddy.c
index 1daf778cf6fa..94f8c34fc293 100644
--- a/drivers/gpu/drm/drm_buddy.c
+++ b/drivers/gpu/drm/drm_buddy.c
@@ -524,11 +524,11 @@ __alloc_range_bias(struct drm_buddy *mm,
                  continue;
          }
  +        if (!fallback && block_incompatible(block, flags))
+            continue;
+
          if (contains(start, end, block_start, block_end) &&
              order == drm_buddy_block_order(block)) {
-            if (!fallback && block_incompatible(block, flags))
-                continue;
-
              /*
               * Find the free block within the range.
               */




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