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 picard.linux.it (picard.linux.it [213.254.12.146]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7F1C4C4332F for ; Tue, 29 Nov 2022 04:38:52 +0000 (UTC) Received: from picard.linux.it (localhost [IPv6:::1]) by picard.linux.it (Postfix) with ESMTP id 350433C6D0A for ; Tue, 29 Nov 2022 05:38:50 +0100 (CET) Received: from in-6.smtp.seeweb.it (in-6.smtp.seeweb.it [IPv6:2001:4b78:1:20::6]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384)) (No client certificate requested) by picard.linux.it (Postfix) with ESMTPS id 646373C6D0A for ; Tue, 29 Nov 2022 05:38:38 +0100 (CET) Received: from mail-pj1-x1036.google.com (mail-pj1-x1036.google.com [IPv6:2607:f8b0:4864:20::1036]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by in-6.smtp.seeweb.it (Postfix) with ESMTPS id 520311400278 for ; Tue, 29 Nov 2022 05:38:38 +0100 (CET) Received: by mail-pj1-x1036.google.com with SMTP id hd14-20020a17090b458e00b0021909875bccso311300pjb.1 for ; Mon, 28 Nov 2022 20:38:38 -0800 (PST) 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=48Xm3VfV4sx0+bUZmYTNZIpSa0XzNl3vvIQW42o7jJQ=; b=T5LUfnFRWiWAdf7zeRpoyRCNSY164AYnoRT7heMBmwvQh/rkonGTMP2fDaxZ3cb3zq WgnsezEnwq9KAb5FRfzcc5muJkJxXkVwjBgn2+VHTj+wotmFhoJq5rNh+hOLZk0LZ3g/ Ozt9Ev52HQoPAwOc9bKAd0REmzrYFGjcYLOh4= 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=48Xm3VfV4sx0+bUZmYTNZIpSa0XzNl3vvIQW42o7jJQ=; b=FIcAxVZseaeFMG4ma+w+X7dS6LUHGUrZVTWFB/Fc2NUxrBvHwBoTejrOG+DClgnFct aSxidfgk9QEPqdzSjjMueX7i3WxBmFBVmExtGrTcGeklLDmMz9O8U38m9NT0sU8bFwb5 W/4CGFDH1bGvLnP9MvrGJj4fmBGzWqAWUy7fupXbpyS1/D6cRATjgg2GHhuhgN1sFFLq FgvBRqKuKFaMr4nGXyvVWw5j2HQQJAGW0M835gwB7IfVX19sxF9AaToQP/aowtyELdck iLbTjWA8eG1MtTCQ2nn85SWUpOodeWSFm7p9YONs6fg+THRb3rjnz0OE3sEYjgfxGBN8 u2Jw== X-Gm-Message-State: ANoB5pnAj8jEAt4Y0RlSGfqXb/3sc5Af96i+ncLpMOj5FsUfPcr2Sm84 0be1gjzTOJz8fJnqvexdOFgfSg== X-Google-Smtp-Source: AA0mqf5c3WV2DuftkVuXZ0Ps8inmw7FchDxrXziCDRwmtaUhnUDq6si8XtaqqqnfHmFIrk0qg4O0fg== X-Received: by 2002:a17:90a:fb86:b0:219:26b5:d41e with SMTP id cp6-20020a17090afb8600b0021926b5d41emr12318785pjb.20.1669696716694; Mon, 28 Nov 2022 20:38:36 -0800 (PST) Received: from google.com ([240f:75:7537:3187:2565:b2f5:cacd:a5d9]) by smtp.gmail.com with ESMTPSA id o42-20020a17090a0a2d00b00219133d0f4esm321809pjo.9.2022.11.28.20.38.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Nov 2022 20:38:36 -0800 (PST) Date: Tue, 29 Nov 2022 13:38:30 +0900 From: Sergey Senozhatsky To: Petr Vorel Message-ID: References: <20221107191136.18048-1-pvorel@suse.cz> <3ac740c0-954b-5e68-b413-0adc7bc5a2b5@suse.cz> <9489dd1c-012c-8b5d-b670-a27213da287a@suse.cz> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-Virus-Scanned: clamav-milter 0.102.4 at in-6.smtp.seeweb.it X-Virus-Status: Clean Subject: Re: [LTP] [PATCH 0/1] Possible bug in zram on ppc64le on vfat X-BeenThere: ltp@lists.linux.it X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Test Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jens Axboe , Minchan Kim , OGAWA Hirofumi , linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, Sergey Senozhatsky , Nitin Gupta , linux-kselftest@vger.kernel.org, ltp@lists.linux.it Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ltp-bounces+ltp=archiver.kernel.org@lists.linux.it Sender: "ltp" On (22/11/22 16:07), Petr Vorel wrote: > > On 11. 11. 22 1:48, Sergey Senozhatsky wrote: > > > On (22/11/10 15:29), Martin Doucha wrote: [..] > > > Can you try using /dev/urandom for dd, not /dev/zero? > > > Do you still see zeroes in sysfs output or some random values? > > > After 50 test runs on a kernel where the issue is confirmed, I could not > > reproduce the failure while filling the device from /dev/urandom instead of > > /dev/zero. The test reported compression ratio around 1.8-2.5 which means > > the memory usage reported by mm_stat was 10-13MB. > > Martin, thanks a lot for reruning tests. I wonder problems on /dev/zero is a > kernel bug or just problem which should be workarounded. Hmm. Does CONFIG_KASAN show anything interesting? -- Mailing list info: https://lists.linux.it/listinfo/ltp