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 29008FA3744 for ; Fri, 28 Oct 2022 02:31:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236197AbiJ1CbW (ORCPT ); Thu, 27 Oct 2022 22:31:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44726 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235368AbiJ1CbU (ORCPT ); Thu, 27 Oct 2022 22:31:20 -0400 Received: from mail-pj1-x102b.google.com (mail-pj1-x102b.google.com [IPv6:2607:f8b0:4864:20::102b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 23BEBBCBAE for ; Thu, 27 Oct 2022 19:31:19 -0700 (PDT) Received: by mail-pj1-x102b.google.com with SMTP id u8-20020a17090a5e4800b002106dcdd4a0so8582496pji.1 for ; Thu, 27 Oct 2022 19:31:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=tAUHHH/m0eIDeN4f4s+iXMFmqb+KGK4/n0ZCUCCOc5I=; b=aSJM+OG1FhyemlYtNwTjw5ZV4VuGb+rqhlQAT7rtmCvgGxlpk6ZnaI2nltig9f4BbZ 0PHobX3HoAX2IxGudWVhQ6GzIsWvwD92Ad+AqVY3003VaLigfymIuruJNDEkJ2/30Xn8 dxuLieOP54d6pyehSJRWCTwwCRMwpyRQo4cNg= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=tAUHHH/m0eIDeN4f4s+iXMFmqb+KGK4/n0ZCUCCOc5I=; b=4mPElUkblCeQk9oOGqIVLazA6FMCSYa2yR9xQ/VLlA5ehXSm1+B+Bt15D8+LtwJ8qF mf98jceOPaHOwxglHj73VJzq4w3DyfejALuAVEXMt3Jq+nI0unq0gCD2rICBMw91ePuT W75R5oEJDuHTWtnQBnbfbSm5J3Va67HfTxmmteeRXxkC/J2LPoryERRf+064dQ3DPcKH g+iQ45ldeY0UaMM4fj/jmeGgBfiHR9R5Cr/bzTKG2SrEscGpoxeLC1JtMaMX08L0H5DW aoBo6s5ot/yOkelUsVvroKmspPksB+LTkN59ao9ftnQ9JHl1FNkIxThfiO7p1lEpOAdS 3vVA== X-Gm-Message-State: ACrzQf2d2yS3TDehBNoJzvBpG5lV3NCM4Dy9kM4St3nBRr8dv0H1Ig0+ 2GB1VjTCO4Mhkkc6ImkIoWeXiQ== X-Google-Smtp-Source: AMsMyM5nOKKnkWR9Ks8X1/lz1RvJR71ZgqIIeKuYxY6WVk4l1o1x/tiZwsP6ykw6vNdeD8zsm0YyYA== X-Received: by 2002:a17:90a:1946:b0:212:f926:5382 with SMTP id 6-20020a17090a194600b00212f9265382mr13460581pjh.218.1666924278543; Thu, 27 Oct 2022 19:31:18 -0700 (PDT) Received: from google.com ([240f:75:7537:3187:dd1f:6bfc:e6b3:cd8d]) by smtp.gmail.com with ESMTPSA id e5-20020a17090a818500b0020d9ac33fbbsm1623721pjn.17.2022.10.27.19.31.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Oct 2022 19:31:17 -0700 (PDT) Date: Fri, 28 Oct 2022 11:31:14 +0900 From: Sergey Senozhatsky To: Andrew Morton Cc: mm-commits@vger.kernel.org, ngupta@vflare.org, minchan@kernel.org, avromanov@sberdevices.ru, linux-kernel@vger.kernel.org Subject: Re: + zram-add-size-class-equals-check-into-recompression.patch added to mm-unstable branch Message-ID: References: <20221027200348.1BC0FC433C1@smtp.kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20221027200348.1BC0FC433C1@smtp.kernel.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On (22/10/27 13:03), Andrew Morton wrote: > The patch titled > Subject: zram: add size class equals check into recompression > has been added to the -mm mm-unstable branch. Its filename is > zram-add-size-class-equals-check-into-recompression.patch > > This patch will shortly appear at > https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/zram-add-size-class-equals-check-into-recompression.patch [..] > Patch series "zsmalloc/zram: configurable zspage size", v3. > > It makes no sense for us to recompress the object if it will be in the > same size class. We anyway don't get any memory gain. But, at the same > time, we get a CPU time overhead when inserting this object into zspage > and decompressing it afterwards. > > Link: https://lkml.kernel.org/r/20221027042651.234524-1-senozhatsky@chromium.org > Link: https://lkml.kernel.org/r/20221027042651.234524-2-senozhatsky@chromium.org > Signed-off-by: Alexey Romanov > Cc: Minchan Kim > Cc: Nitin Gupta > Signed-off-by: Andrew Morton Reviewed-by: Sergey Senozhatsky