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 lists1p.gnu.org (lists1p.gnu.org [209.51.188.17]) (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 89092C624A4 for ; Thu, 3 Sep 2026 16:58:02 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists1p.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1x2Aku-00089v-8r; Thu, 03 Sep 2026 12:57:40 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1x2Aks-00089M-L5; Thu, 03 Sep 2026 12:57:38 -0400 Received: from smtp-out2.suse.de ([195.135.223.131]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1x2Akq-0001gd-Sd; Thu, 03 Sep 2026 12:57:38 -0400 Received: from imap1.dmz-prg2.suse.org (imap1.dmz-prg2.suse.org [IPv6:2a07:de40:b281:104:10:150:64:97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id AE0601FCF6; Thu, 3 Sep 2026 16:57:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1788454650; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=1VmjQCivKmURVXJpa2FBHGJpG/fmJb3szgzLCFZLjTQ=; b=NwtpCZ2YUkqC+50bK3gQ3lMbGwkuvAb+psaCrhMrzvy3216TBYxZ2UKWpMq7PO4O3YSdzM znovybVOe8puafWcspuZNSNYmngN9NkwW+fO5IUxzfkc+l2BG0qr8mtxMYzx7BdxSWC8Fi N8C+7nNOPiXAxNwyODHYuhxfxyRRMfU= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1788454650; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=1VmjQCivKmURVXJpa2FBHGJpG/fmJb3szgzLCFZLjTQ=; b=5BcupLuVqp2+xggP+J9U8B4dj610BCqay6b4UC6RrCBEbNE1A/volq9YbPNsaA4HtlCVyu Zeap5TynRcIlFABA== Authentication-Results: smtp-out2.suse.de; dkim=pass header.d=suse.de header.s=susede2_rsa header.b=ERDTnlhW; dkim=pass header.d=suse.de header.s=susede2_ed25519 header.b=GQ7QHYBJ DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1788454646; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=1VmjQCivKmURVXJpa2FBHGJpG/fmJb3szgzLCFZLjTQ=; b=ERDTnlhWQpwaeMBxA50AOS0YIv93XNkLv1snR5whTD5NxriZEDtujhMcVZsNzTXEzi5F9i iFpUoNbLtaiz+8XeVeAq9Js0VS6kSXWfm4w5zoEod/LycXe0b1Vnw7EgmSlHqqaDWdnhxv tAgVXXvc0taKMema/0lsCvU1VKKk1S4= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1788454646; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=1VmjQCivKmURVXJpa2FBHGJpG/fmJb3szgzLCFZLjTQ=; b=GQ7QHYBJE+J/8FhjtaT02zNmiHV2Q6P5P8ivAZtVB/pH8N8fd2/q7ouBax4IY4IoVEnxie TI/ZDm/RCYorbxCw== Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id 3645C136E6; Thu, 3 Sep 2026 16:57:26 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id sQVuAvammWoCKQAAD6G6ig (envelope-from ); Thu, 03 Sep 2026 16:57:26 +0000 From: Fabiano Rosas To: "Denis V. Lunev" , =?utf-8?Q?Daniel_P=2E_Berrang?= =?utf-8?Q?=C3=A9?= , Thomas Huth Cc: "Denis V. Lunev" , qemu-devel@nongnu.org, qemu-block@nongnu.org, John Snow , Reinoud Zandijk Subject: Re: [PATCH 0/7] tests/qtest: fix the disk tests on a host with a small /tmp In-Reply-To: <8604eafa-c683-4d89-b180-5b26c56b7817@virtuozzo.com> References: <20260824200627.2180635-1-den@openvz.org> <8604eafa-c683-4d89-b180-5b26c56b7817@virtuozzo.com> Date: Thu, 03 Sep 2026 13:57:23 -0300 Message-ID: <87jyp2gtn0.fsf@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: AE0601FCF6 X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Rspamd-Action: no action X-Spamd-Result: default: False [-4.51 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; MISSING_XM_UA(0.00)[]; RCPT_COUNT_SEVEN(0.00)[8]; MIME_TRACE(0.00)[0:+]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_TLS_ALL(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,imap1.dmz-prg2.suse.org:rdns,suse.de:dkim,suse.de:mid]; DKIM_TRACE(0.00)[suse.de:+] Received-SPF: pass client-ip=195.135.223.131; envelope-from=farosas@suse.de; helo=smtp-out2.suse.de X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org "Denis V. Lunev" writes: > On 8/27/26 13:03, Daniel P. Berrang=C3=A9 wrote: >> On Thu, Aug 27, 2026 at 12:16:56PM +0200, Thomas Huth wrote: >>> Hi Denis! >>> >>> Please make sure to CC: the qtest maintainer (Fabiano Rosas) on series = like >>> this. >>> >>> On 24/08/2026 22.06, Denis V. Lunev wrote: >>>> John reported ide-test dying at startup in the NetBSD VM: >>>> >>>> ERROR:../src/tests/qtest/ide-test.c:1260:main: assertion failed: >>>> (ret =3D=3D 0) >>>> >>>> The hypothesys is that the ftruncate() of a 64 MiB scratch image. NetB= SD >>>> mounts /tmp as a tmpfs sized at 25% of RAM and charges a file its full >>>> length themoment it is extended, so a sparse image is not free there a= nd >>>> the call returns ENOSPC. The assert dates to 2013, nothing regressed. >>> Does NetBSD have another file like /var/tmp that might be friendlier to >>> sparse files? If so, maybe that should be used instead? >>> >>> OTOH, our NetBSD VM in tests/vm/ uses 4G of RAM, so a temporary file wi= th >>> just 64 MiB should really not be a problem...? >> Or this is a concurrency scaling problem, or racing with another test >> that also uses stuff ? >> >> We hard code memory to 4 GB, but -smp we scale to "$NUM-CPUs / 2" >> for the "make vm-build-DIST" commands. >> >> IOW, regardless of whether QEMU is launched with -smp 1 or -smp 20, >> we only give it 4 GB to play with. We could be using a lot of RAM >> for concurrent build jobs leaving almost nothing for the tmpfs for >> the test. >> >> If we were that close to exhaustion I'd expected to see out of >> memory errors, but I'm unclear what NetBSD's behaviour is in >> this respect ? Maybe normal RAM usage can be pushed to swap >> (of which I see another 4 GB) while tmpfs can't be pushed >> to swap ? >> >> >> >> >> With regards, >> Daniel > Guys, > > will somebody take a look into what was done? > This makes sense anyway - unified same class error tracking > plus requirements reduction. > I cannot reproduce this. I also don't think ENOSPC on 64MB is something worth the churn at all. > Or if nobody care I could just push along with another > test fix? > > Thank you in advance, > =C2=A0 =C2=A0 Den