From f305464862ec47d4e1fbc526354f61fc1e4d9e55 Mon Sep 17 00:00:00 2001 From: SJ Park Date: Wed, 2 Sep 2026 18:07:21 -0700 Subject: [PATCH] Revert "samples/damon/mtier: error out for zero quota goal target values" This reverts commit a16fd3ad9d89b05475864da97327870464611736. The commit was made to avoid zero damos quota goal target value, because it can trigger division-by-zero. Now the core layer handles the corner case. It returns an error for any attempt setting the aero target_value. The corner case handling in DAMON_SAMPLE_MTIER is hence no more needed. Remove it. Link: https://lore.kernel.org/20260903010722.94244-4-sj@kernel.org Signed-off-by: SJ Park Signed-off-by: Andrew Morton --- samples/damon/mtier.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/samples/damon/mtier.c b/samples/damon/mtier.c index bea45c87cc9b..27dc88bdf7a0 100644 --- a/samples/damon/mtier.c +++ b/samples/damon/mtier.c @@ -161,9 +161,6 @@ static struct damon_ctx *damon_sample_mtier_build_ctx(bool promote) if (!scheme) goto free_out; damon_set_schemes(ctx, &scheme, 1); - /* zero target value causes division by zero in damos_quota_store() */ - if (!node0_mem_used_bp || !node0_mem_free_bp) - goto free_out; quota_goal = damos_new_quota_goal( promote ? DAMOS_QUOTA_NODE_MEM_USED_BP : DAMOS_QUOTA_NODE_MEM_FREE_BP,