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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7E4AAC3ABC9 for ; Thu, 15 May 2025 03:19:34 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 55AA16B00BE; Wed, 14 May 2025 23:19:33 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 4E1046B00EA; Wed, 14 May 2025 23:19:33 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 333AA6B00EE; Wed, 14 May 2025 23:19:33 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id 0A3416B00BE for ; Wed, 14 May 2025 23:19:33 -0400 (EDT) Received: from smtpin09.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id 665F9141426 for ; Thu, 15 May 2025 03:19:33 +0000 (UTC) X-FDA: 83443687026.09.7463493 Received: from mail-pl1-f178.google.com (mail-pl1-f178.google.com [209.85.214.178]) by imf18.hostedemail.com (Postfix) with ESMTP id 0DF111C000A for ; Thu, 15 May 2025 03:19:30 +0000 (UTC) Authentication-Results: imf18.hostedemail.com; dkim=pass header.d=chromium.org header.s=google header.b="KnW/vXpW"; spf=pass (imf18.hostedemail.com: domain of senozhatsky@chromium.org designates 209.85.214.178 as permitted sender) smtp.mailfrom=senozhatsky@chromium.org; dmarc=pass (policy=none) header.from=chromium.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1747279171; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=NfMiph1RSohe0S02imOGJtgpN9S3gS74RbgzBkoa5vI=; b=qIehNC6bDy3dJTv74ef7NDBtc+P6jVUCLAgOSIuAzMBp4vGzIqPQwKlIQqh96CiAPySzNe EsFN8+/+jpU7EGLRnCtDrqIRs0Mo3qp5gElqVi9oSIfKorXp1dRbdKx8+CIhWH1+oHjiR5 wGkx3Kfh1s+lppOuE/LIhAR00pflbVE= ARC-Authentication-Results: i=1; imf18.hostedemail.com; dkim=pass header.d=chromium.org header.s=google header.b="KnW/vXpW"; spf=pass (imf18.hostedemail.com: domain of senozhatsky@chromium.org designates 209.85.214.178 as permitted sender) smtp.mailfrom=senozhatsky@chromium.org; dmarc=pass (policy=none) header.from=chromium.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1747279171; a=rsa-sha256; cv=none; b=NyQbQMWRVJzT4HzUpBn1FMl0GMUC0SsuwhbknRW2AHDLp1yYp/G7/8YRCoPpexPS1CzInF WBUc53P5d6/M37DoihutX9ASKUexcrT9to1+at0qpKUAzgCHjoXc3B4Pam02Edyal2z7kB TpRQ7l9Qtl1ehlb2NsJDlFs7QcVu9H8= Received: by mail-pl1-f178.google.com with SMTP id d9443c01a7336-22e76850b80so3101545ad.1 for ; Wed, 14 May 2025 20:19:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1747279170; x=1747883970; darn=kvack.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=NfMiph1RSohe0S02imOGJtgpN9S3gS74RbgzBkoa5vI=; b=KnW/vXpW6M9R+QxDgtOj4GG19ubPOCoDTYqYY5zxpXQ1g0+K4KGEXsaXliNySAHN7A 6xEjG9vH734ov5/p6matz82BCeQot6r2QonR3e2uJ0dwbcxR0RalEkmObI8frlHbOSZd gIVQXBhRxKdtbbUcomZ7KAb8OKvC7LsUZKnTY= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1747279170; x=1747883970; 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=NfMiph1RSohe0S02imOGJtgpN9S3gS74RbgzBkoa5vI=; b=tbDQyZp47hEy4G2niINF4P4/YfR/75iydHX3liopBrAWFQDhReAi/GxTZyoQ+30K+Y tSeUv6BJu4cpMvM+rtk4fPgr86VXsTN1/iQA5mQ6ds30qr6z5LdOZpLw3llRr9312nzz huu0qsh3dKNfzqfdzL2NC1+Cvfem53SeCt907ez83sZEOxx5tU4iBihqlIP0ee/reqSg oNhS/nJW99KIkEM7mP8SH0IV77957+e9bIGFametsNtNNxvpKoCk5S7ouCbJeaPJWYv+ sRizuwOQvgkvtwrfOPZsnYhqvUKcDfEUNYzrUOgE2Dwsc/dbdrOY65XQE/X86gbncW9G kUMQ== X-Forwarded-Encrypted: i=1; AJvYcCWLJ6XHKP752BQqhq7SUyWXhEOm0eevk+jTbA0eEBGqjNJOAPHtaIiZyhc9bEVODlmKQo1bjCR9ag==@kvack.org X-Gm-Message-State: AOJu0Yw824R/Gm15hReuf3GTeEu/CKmczNsvvX9/PuhrkChWQIr9pAlT bRJ7hQ8d5Lsun80KQeV6pCTu+cEm1maEQ6c2X3tVzwxuh2LS1zOwTYdWTh31ng== X-Gm-Gg: ASbGncuPFIQTicE+qjjByAHRRnslSllhuuJzxTSMB2Dzu500zI3x8n/1Vg8sf6EGuWm 8S0uaM1lPLzfLOkfkuYyFRd8kjZTMIq+MjMbwx6sEXrnp38UucBBhwqNLVSYoaBYDnRlfvaqtmy 1xqsf4B+Dv5idyy168EjaQdkgKwAvOH81Wd/43Bce6rdVSaPJ22TE/wiZxcRK4pKlwC+/UCqgyQ rnshhBTKWCJfCcDNDjOKlzz869Vq+oSEXFhBIsKpDjjZb0sY7ux1uLXcu0zxzsq8tE5kD5gHk/Y MFNzoG+89dPoyn87K0rja0/U5Padd7D48SgBYuF/FWmj+TLuJmYxROM= X-Google-Smtp-Source: AGHT+IGvBDkjV4xRFAQFnM2nOHWCd9M5YhCblzNXzaPx80ufn2YWCWTUk/8FrScqDLEdru3/StH3lg== X-Received: by 2002:a17:903:1c8:b0:215:b75f:a1cb with SMTP id d9443c01a7336-231980cb1admr80598445ad.9.1747279169920; Wed, 14 May 2025 20:19:29 -0700 (PDT) Received: from google.com ([2401:fa00:8f:203:291c:c511:a135:fe23]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-22fc8271c01sm106523515ad.140.2025.05.14.20.19.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 May 2025 20:19:29 -0700 (PDT) Date: Thu, 15 May 2025 12:19:25 +0900 From: Sergey Senozhatsky To: Herbert Xu Cc: Sergey Senozhatsky , Zaslonko Mikhail , Andrew Morton , Minchan Kim , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Heiko Carstens , Ilya Leoshkevich Subject: Re: [PATCH 2/2] zram: support deflate-specific params Message-ID: <2bnnkkwhqor73ls7dvsxlt57tp2u3xf2o27opkveuqwgh3xf2j@5kzgq4eej3cw> References: <20250514024825.1745489-1-senozhatsky@chromium.org> <20250514024825.1745489-3-senozhatsky@chromium.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Server: rspam10 X-Stat-Signature: 4cm9xowuqcueaeanda8bebgndhhp94dw X-Rspamd-Queue-Id: 0DF111C000A X-Rspam-User: X-HE-Tag: 1747279170-98483 X-HE-Meta: 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 I+m+XtkD mlcyAtXo13wWrObo= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On (25/05/15 11:17), Herbert Xu wrote: > On Thu, May 15, 2025 at 12:14:38PM +0900, Sergey Senozhatsky wrote: > > > > Yeah, so in zram we can use only raw deflate (we decompress only what we > > have compressed earlier and the data never leaves the device.) But in case > > of Crypto API I actually don't know, added Herbert to the Cc. > > The Crypto API has only ever used the raw deflate format. OK, so do we want to limit user-space and permit only "raw deflate" winbits values. that is only negative ones (either explicitly or implicitly (by negating the value before zlib API calls))?