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Mon, 16 Mar 2020 11:02:12 +0000 Subject: Re: disk revalidation updates and OOM To: Martin Wilck , Christoph Hellwig , jack@suse.cz, Jens Axboe , viro@zeniv.linux.org.uk, bvanassche@acm.org, keith.busch@intel.com, tglx@linutronix.de, yuyufen@huawei.com, linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org References: <93b395e6-5c3f-0157-9572-af0f9094dbd7@windriver.com> <209f06496c1ef56b52b0ec67c503838e402c8911.camel@suse.com> <47735babf2f02ce85e9201df403bf3e1ec5579d6.camel@suse.com> From: He Zhe Message-ID: <3315bffe-80d2-ca43-9d24-05a827483fce@windriver.com> Date: Mon, 16 Mar 2020 19:02:02 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 In-Reply-To: <47735babf2f02ce85e9201df403bf3e1ec5579d6.camel@suse.com> Content-Type: text/plain; charset=iso-8859-15 Content-Transfer-Encoding: 7bit Content-Language: en-US X-ClientProxiedBy: HK2PR02CA0131.apcprd02.prod.outlook.com (2603:1096:202:16::15) To SN6PR11MB3360.namprd11.prod.outlook.com (2603:10b6:805:c8::30) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [128.224.162.175] (60.247.85.82) by HK2PR02CA0131.apcprd02.prod.outlook.com (2603:1096:202:16::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2814.13 via Frontend Transport; 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X-Microsoft-Antispam-Message-Info: 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 X-MS-Exchange-AntiSpam-MessageData: fJkWSLv/F+rdDd/GbpYN6v3lJyecuk2schJ0uL19acuHjKRIljchzGcmFeZ78m7cAHFQfE/F/PIlUI9IcDudC/k8PTNu1uhQgBHWJDaYpg03m1s26TEc3PQg5UrWjyl6pAOvOqHRdPpGJ7XilOkhMA== X-OriginatorOrg: windriver.com X-MS-Exchange-CrossTenant-Network-Message-Id: 83613402-f04c-40f1-927a-08d7c9997a7a X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Mar 2020 11:02:11.9466 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 8ddb2873-a1ad-4a18-ae4e-4644631433be X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: pG9IK9VJKuys87iAALQrDl2mdwmz7cDIoR4b6cpNd5toYY87Nmv/PZw8M3teXLp184BfU8WYDx7RlUWnFki16A== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN6PR11MB3504 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On 3/11/20 11:11 PM, Martin Wilck wrote: > On Wed, 2020-03-11 at 11:29 +0100, Martin Wilck wrote: >> On Mon, 2020-03-02 at 11:55 +0800, He Zhe wrote: >>> Hi, >>> >>> Since the following commit >>> https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/commit/?h=for-5.5/disk-revalidate&id=6917d0689993f46d97d40dd66c601d0fd5b1dbdd >>> until now(v5.6-rc4), >>> >>> If we start udisksd service of systemd(v244), systemd-udevd will >>> scan >>> /dev/hdc >>> (the cdrom device created by default in qemu(v4.2.0)). systemd- >>> udevd >>> will >>> endlessly run and cause OOM. >> I've tried to reproduce this, but so far I haven't been able to. >> Perhaps because the distro 5.5.7 kernel I've tried (which contains >> the >> offending commit 142fe8f) has no IDE support - the qemu IDE CD shows >> up >> as sr0, with the ata_piix driver. I have systemd-udevd 244. Enabling >> udisksd makes no difference, the system runs stably. ISO images can >> be "ejected" and loaded, single uevents are received and processed. >> >> Does this happen for you if you use ata_piix? > I have enabled the ATA drivers on my test system now, and I still don't > see the issue. "hd*" for CDROM devices has been marked deprecated in > udev since 2009 (!). > > Is it possible that you have the legacy udisksd running, and didn't > disable CD-ROM polling? Thanks for the suggestion, I'll try this ASAP. Zhe > > Martin > >