From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 367DDC636CC for ; Fri, 3 Feb 2023 06:42:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232559AbjBCGmm (ORCPT ); Fri, 3 Feb 2023 01:42:42 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39630 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232503AbjBCGlH (ORCPT ); Fri, 3 Feb 2023 01:41:07 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D13AC8FB77 for ; Thu, 2 Feb 2023 22:37:54 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 78848B828B2 for ; Fri, 3 Feb 2023 06:37:53 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 19639C4339B; Fri, 3 Feb 2023 06:37:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1675406272; bh=ZLUNsdaG47LFnXgiEEvU+jvnWQwCpS2AERrHqDs6vdA=; h=Date:To:From:Subject:From; b=CK5I5u3a1ZNkhb+rhMJZXt0R3G/4wFQ4V1Op9ipZs/IAPY7UjhjvpnphO/5YF2tBc koAI8EmD6ARtRvWr1on63wQ/d95Jr3chuJDz7UcuwToQfxwhMiic5g9vicIy6B5oHD 9iU2h561ZJ7Aes445+7ZUMPi0aG2Hoy5v2fM6ffY= Date: Thu, 02 Feb 2023 22:37:51 -0800 To: mm-commits@vger.kernel.org, minchan@kernel.org, mike.kravetz@oracle.com, senozhatsky@chromium.org, akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-stable] zsmalloc-skip-chain-size-calculation-for-pow_of_2-classes.patch removed from -mm tree Message-Id: <20230203063752.19639C4339B@smtp.kernel.org> Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org The quilt patch titled Subject: zsmalloc: skip chain size calculation for pow_of_2 classes has been removed from the -mm tree. Its filename was zsmalloc-skip-chain-size-calculation-for-pow_of_2-classes.patch This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: Sergey Senozhatsky Subject: zsmalloc: skip chain size calculation for pow_of_2 classes Date: Wed, 18 Jan 2023 09:52:08 +0900 If a class size is power of 2 then it wastes no memory and the best configuration is 1 physical page per-zspage. Link: https://lkml.kernel.org/r/20230118005210.2814763-3-senozhatsky@chromium.org Signed-off-by: Sergey Senozhatsky Acked-by: Minchan Kim Cc: Mike Kravetz Signed-off-by: Andrew Morton --- --- a/mm/zsmalloc.c~zsmalloc-skip-chain-size-calculation-for-pow_of_2-classes +++ a/mm/zsmalloc.c @@ -2370,6 +2370,9 @@ static int calculate_zspage_chain_size(i int i, min_waste = INT_MAX; int chain_size = 1; + if (is_power_of_2(class_size)) + return chain_size; + for (i = 1; i <= ZS_MAX_PAGES_PER_ZSPAGE; i++) { int waste; _ Patches currently in -mm which might be from senozhatsky@chromium.org are