linux-kernel - [PATCH 5/6] zsmalloc: break out of loop when found perfect zspage order

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Message-Id: <20221024161213.3221725-6-senozhatsky@chromium.org>
Date:   Tue, 25 Oct 2022 01:12:12 +0900
From:   Sergey Senozhatsky <senozhatsky@...omium.org>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Minchan Kim <minchan@...nel.org>
Cc:     Nitin Gupta <ngupta@...are.org>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, Sergey Senozhatsky <senozhatsky@...omium.org>
Subject: [PATCH 5/6] zsmalloc: break out of loop when found perfect zspage order

If we found zspage configuration that gives us perfect
100% used percentage (zero wasted space) then there is
no point it trying any other configuration

Signed-off-by: Sergey Senozhatsky <senozhatsky@...omium.org>
---
 mm/zsmalloc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index fa55e0c66f8d..40a09b1f63b5 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -790,6 +790,9 @@ static int get_pages_per_zspage(struct zs_pool *pool, int class_size)
 			max_usedpc = usedpc;
 			max_usedpc_order = i;
 		}
+
+		if (usedpc == 100)
+			break;
 	}
 
 	return max_usedpc_order;
-- 
2.38.0.135.g90850a2211-goog