From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f174.google.com (mail-pf1-f174.google.com [209.85.210.174]) (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 5CDCA184D for ; Sun, 5 May 2024 05:13:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.174 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714885992; cv=none; b=pq1tU0aPKaz7P3/LmNFeBGdAGSUCk/iAd+xL9sNRNbVUifKz2tQ7RHijdNKHry9LDPlpIujlLXGSBgBzgU3/ThFcPYNRxrceal3w5TDjYSAvwoInle1So8qP9USAt0wlz06LDhxsVaqcA7Xqz1oeAhdRqBBcHUyKBL8R9fp49hY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714885992; c=relaxed/simple; bh=lehZe/7AZUPc+TY69M7+JDOOMjWhzo3PGggFRdj3IxU=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=ueOIYktWdD436K+XIiVVHDfzWGktBQJ953XJKFub965y1a75KAsOk8KI/TbBknApTLyrbHCO0/i4KGsz9YwhAPLrs5l5ZAp8QnrysOHKWX1hTmZs85VsBwQYoUMKrMEN3stOY7EZm2tsHd6XFZn+aSoUdBD6siW0b+i1JoZ/liw= 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=lQ0S6AeN; arc=none smtp.client-ip=209.85.210.174 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="lQ0S6AeN" Received: by mail-pf1-f174.google.com with SMTP id d2e1a72fcca58-6f44a2d1e3dso765129b3a.3 for ; Sat, 04 May 2024 22:13:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1714885991; x=1715490791; 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=NsfIaMjECuvVC7Z9W0Sqg9Q69W+YCDdoNBcIXl2QIwk=; b=lQ0S6AeNmPbdX7bWqd7XTfvrp/l74zHlBTfz/rJwAsGHSd0i6sJQEshSHlEHNqxuxH pkjf4mgpmtag+PI7mPu0VFRNj4OGf/ZHINipTjIPSIMhtp1dQ2lhs5qpphTlq2dnTFHp swWICkzSZ2OKAPGhfHctiOlEsmHZN6wfbz0pc= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1714885991; x=1715490791; 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=NsfIaMjECuvVC7Z9W0Sqg9Q69W+YCDdoNBcIXl2QIwk=; b=LTktZGltpLHsTi5pVWpwRfD012X9jKu6q3QzJqLi47HUUFor8hjcpiRVU6t2M7bS+i bsFFNy373PcxrbtaQeJ/f2O53izqxN/+eARjPWA+Hr+mHAs/SF9MIqHx1jSyp2i23xe2 6QQztqLThkvImzihfBjzlyphCxxKM8RSSvxQoW2ffn8FKCRE1YlZI3g/aHy0DLbjtG/d oidVxwWD1e0SDeawt2QZuga05oeFZJyBhQfCt7CP+/VhoRC0oa1SYmyIRn8wrUg0t+ls xqqu3IEOISHeAJgdwku82m/DruXCFiBj7XdpJYsuFKBgjvkEDK3Dytk3mUmxxB7+CQ30 ZA0g== X-Forwarded-Encrypted: i=1; AJvYcCXE/XSmLpVs3aKMJFpr3BY0rzlqYYe9FLKNecKBACnWyYn1f2Y9nUiLuE7Q4Zl2J06uT0sH7Njsyt0ta116rIqo3pWYx0y37UsxrWs3 X-Gm-Message-State: AOJu0YzuEWOLKuJVNYgyW7k4CxrNxeZTa8r1qaTAPnYO14lDEpxyjNnl EAmg9UlUxxGBpjx1N8eor4Q892sxtDZHNshIomUN6pfDqCbrdu0TgWoGNmulpw== X-Google-Smtp-Source: AGHT+IGx2K+j9TsopgjG/72ja+WbDJMY4Wn9iAnqvKY7ERj2M9PxcHA1IZC2lVKSrAM72Djm/H4zqw== X-Received: by 2002:a05:6a21:3405:b0:1af:8fa8:3116 with SMTP id yn5-20020a056a21340500b001af8fa83116mr2671010pzb.42.1714885990672; Sat, 04 May 2024 22:13:10 -0700 (PDT) Received: from google.com ([2401:fa00:8f:203:8263:3b89:bcee:2ed4]) by smtp.gmail.com with ESMTPSA id jw19-20020a170903279300b001eab3ba8ccfsm5839237plb.285.2024.05.04.22.13.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 04 May 2024 22:13:10 -0700 (PDT) Date: Sun, 5 May 2024 14:13:05 +0900 From: Sergey Senozhatsky To: Andrew Morton Cc: kernel test robot , Minchan Kim , llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, Linux Memory Management List , linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, Sergey Senozhatsky Subject: Re: [PATCH 08/14] zram: check that backends array has at least one backend Message-ID: <20240505051305.GB8623@google.com> References: <20240503091823.3616962-9-senozhatsky@chromium.org> <202405041440.UTBQZAaf-lkp@intel.com> <20240504071416.GH14947@google.com> <20240504161004.f5a0aab5e5aa1033d4696c20@linux-foundation.org> <20240505043957.GA8623@google.com> 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: <20240505043957.GA8623@google.com> On (24/05/05 13:39), Sergey Senozhatsky wrote: [..] > > I guess just pick one if none were selected. How do I pick one if none were selected? Does Kconfig support something like that? > : config ZRAM > : tristate "Compressed RAM block device support" > : depends on BLOCK && SYSFS && MMU > : select ZSMALLOC > : depends on (LZO_COMPRESS && LZO_DECOMPRESS) || \ > : (LZ4_COMPRESS && LZ4_DECOMPRESS) || \ > : (LZ4HC_COMPRESS && LZ4_DECOMPRESS) || \ > : (ZSTD_COMPRESS && ZSTD_DECOMPRESS) || \ > : (ZLIB_DEFLATE && ZLIB_INFLATE) The problem I'm having with this is that FOO_COMPRESS can be M while zram needs Y.