From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f177.google.com (mail-pg1-f177.google.com [209.85.215.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 04ED623EAB2 for ; Wed, 11 Mar 2026 01:25:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.177 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773192314; cv=none; b=Z1ib4/3TBoMUJQfn1Bh3Xp6bNllLDq/3Jp5NfdDFKBKO3H39a47s4WaU8Zn3zRc18GhC04nzcIrtMsQe2JwwN9TA5HWBq3NhfWwzpwC8wrTc+/Hdo2Jry8j1d78mUka52ADhAJF+16bOsiWeP0ZjK29YHDW1Syu2wCeLFlhlPd8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773192314; c=relaxed/simple; bh=s7vvQBUsvhQDKZR1yzVSBXRRnAb/ClEMIBAxhtwxY3U=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=cZ1feSltMI2Gxl2SzVee/miOAu0OSOecnaAVrpPP7PsASCA7hgMvPUaEsitRvr011aEDO7roHGkQAsI1dsgUPrVO49/zsgb+yKh9IjlLa/KwtjCiCd5gzEbLsKi9NNUhRfN769Z60p7zkztfsSbTGgEgOYkNNYQxOJ+4D5wsRoc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org; spf=pass smtp.mailfrom=chromium.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b=ktz2jFC9; arc=none smtp.client-ip=209.85.215.177 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=chromium.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="ktz2jFC9" Received: by mail-pg1-f177.google.com with SMTP id 41be03b00d2f7-c738d327336so3720532a12.0 for ; Tue, 10 Mar 2026 18:25:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1773192312; x=1773797112; darn=vger.kernel.org; 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=bBQTuANcApuDFazoxltcoqNmYct2WzFF44sVelc7tdU=; b=ktz2jFC9xJMwkuuSYa0UXZR+CaWMJQKSqIzCO85q1D2lg1TTr9QcYkFeEA4yupKXy7 zyPIbZgKfU17uMmvXkRrwW6moww0uYNYwPhu8XDoBp2K0DHdOnNGcWrvadrE4A/tW2m2 IDvpH1dQtZLi/45cziBd2TAwGXcjj0r+gMwd8= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1773192312; x=1773797112; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-gg:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=bBQTuANcApuDFazoxltcoqNmYct2WzFF44sVelc7tdU=; b=tnQmAMuHeKGQHamaxyuJ0Mgjkx3I/KEEhWKQ5igDfIuP8nD7enhn74K1oE/r0ToRes /RYTCuxMXdT5zQcdQEEm/wc0PWeeKpNneHVAkpVKdIBHoQIhZFmFwmRKHP5/fx7r4UfK o9qrRT2Bz+aHS6GMNeDHyE68HsRTwdUrQgcmMxSnMVR+fnykntRE27dPqsIx9PBB/VnZ /MKLAH0C5V/AYv2DvlPSpZiUNDYAWWciIsmMPJ0Xjs2YYPgCKT2LnhMe1DauAE5lfQH0 294AYB/bG/tmlPhBt8eE0DboxkJJXxTqqDMLocQ2+r8BTWAwhtWQHXQ78CZqoQ+isayl XgMQ== X-Forwarded-Encrypted: i=1; AJvYcCXiSPT3MhibQpTRZPsTpWt0LhiSPAUC2O2qJdMhDuggg/f1AscOier5FrP20CcPS+Q00zd9WEWav/M+rU0=@vger.kernel.org X-Gm-Message-State: AOJu0YwBgTpukH37j5DPWz8WpfLRBxPdUGNFg1jTUaZRWQmjU/gt7JED uQa9fQHL0wNH/Xk1AeyqzruDHuEv75ruRLtzOd73UbxkMIDTMjRYy2MwW052tyr+BQ== X-Gm-Gg: ATEYQzz9ted0D/Ktk4Arb15mVJJ/DgX+x8HTzMDHI4EyumXgrivdQbDBWd06Gvps4Bj TlUTeA1MgrB+Jus+I50Rpbo97M5LTfMyQYq/GqK6YHFwGFZdiaFVeIu874Vgvs6eJCY+DEZvh28 rS/eadz64/y7lPQCsHC9mylPobDlub1jAGHv+o9RDwUiOe2z7XGmJEna9o1cIFy3y62J7GIHEjl 85r6o2z6a62g5soVWMbrTw4HFk07vB3eUT7q769sXnDBcEhz1f7ZUawAPeH+wSR7tTBdqDeNLfy LIhHafBVLc4VtsgAOhio4l9h1RGrP56fIAT44wyrzW2AeOt7WWPBKLqnOY2P4pLRHweNsHX5lA6 c0xEBvfJ/retHhcpromvlGzWfNlb8YYeV/my9a4ugAi1D6c6PBoPu2BB07adHzsvC5CfkOd2o6y 8vOM1FXagqjRQPZhmdYdYljeCp6kb2BfMJALSbvYdQUjwLoe5/+I+VOpHTP6II8uM= X-Received: by 2002:a05:6a21:a393:b0:398:6fd3:7696 with SMTP id adf61e73a8af0-398c612d5f2mr542619637.59.1773192312444; Tue, 10 Mar 2026 18:25:12 -0700 (PDT) Received: from google.com ([2a00:79e0:2031:6:93a4:8281:fe98:426a]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-c73cdf9f037sm416557a12.23.2026.03.10.18.25.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 10 Mar 2026 18:25:11 -0700 (PDT) Date: Wed, 11 Mar 2026 10:25:08 +0900 From: Sergey Senozhatsky To: gao xu Cc: Sergey Senozhatsky , Minchan Kim , Jens Axboe , "linux-block@vger.kernel.org" , "linux-kernel@vger.kernel.org" , Andrew Morton , "surenb@google.com" , zhouxiaolong Subject: Re: zram: Optimize LZ4 dictionary compression performance Message-ID: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On (26/03/10 02:54), gao xu wrote: > > This optimization improves LZ4 dictionary compression performance by > over 50% in Zram I/O tests. Can you also add a little more details here? What type of a test, actual IO numbers maybe, etc.