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 Date: Sun, 16 Jul 2023 17:16:21 +0200 From: Greg KH Subject: Re: [PATCH 5.15] dm init: add dm-mod.waitfor to wait for asynchronously probed block devices Message-ID: <2023071603-lustily-defraud-2149@gregkh> References: <20230713055841.24815-1-mark-pk.tsai@mediatek.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20230713055841.24815-1-mark-pk.tsai@mediatek.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+lwn-linux-arm-kernel=archive.lwn.net@lists.infradead.org List-Archive: To: Mark-PK Tsai Cc: Alasdair Kergon , Mike Snitzer , dm-devel@redhat.com, Jonathan Corbet , Matthias Brugger , yj.chiang@mediatek.com, Peter Korsgaard , Mike Snitzer , stable@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org On Thu, Jul 13, 2023 at 01:58:37PM +0800, Mark-PK Tsai wrote: > From: Peter Korsgaard > > Just calling wait_for_device_probe() is not enough to ensure that > asynchronously probed block devices are available (E.G. mmc, usb), so > add a "dm-mod.waitfor=[,..,]" parameter to get > dm-init to explicitly wait for specific block devices before > initializing the tables with logic similar to the rootwait logic that > was introduced with commit cc1ed7542c8c ("init: wait for > asynchronously scanned block devices"). > > E.G. with dm-verity on mmc using: > dm-mod.waitfor="PARTLABEL=hash-a,PARTLABEL=root-a" > > [ 0.671671] device-mapper: init: waiting for all devices to be available before creating mapped devices > [ 0.671679] device-mapper: init: waiting for device PARTLABEL=hash-a ... > [ 0.710695] mmc0: new HS200 MMC card at address 0001 > [ 0.711158] mmcblk0: mmc0:0001 004GA0 3.69 GiB > [ 0.715954] mmcblk0boot0: mmc0:0001 004GA0 partition 1 2.00 MiB > [ 0.722085] mmcblk0boot1: mmc0:0001 004GA0 partition 2 2.00 MiB > [ 0.728093] mmcblk0rpmb: mmc0:0001 004GA0 partition 3 512 KiB, chardev (249:0) > [ 0.738274] mmcblk0: p1 p2 p3 p4 p5 p6 p7 > [ 0.751282] device-mapper: init: waiting for device PARTLABEL=root-a ... > [ 0.751306] device-mapper: init: all devices available > [ 0.751683] device-mapper: verity: sha256 using implementation "sha256-generic" > [ 0.759344] device-mapper: ioctl: dm-0 (vroot) is ready > [ 0.766540] VFS: Mounted root (squashfs filesystem) readonly on device 254:0. > > Signed-off-by: Peter Korsgaard > Signed-off-by: Mike Snitzer > Cc: stable@vger.kernel.org > Signed-off-by: Mark-PK Tsai > --- > .../admin-guide/device-mapper/dm-init.rst | 8 +++++++ > drivers/md/dm-init.c | 22 ++++++++++++++++++- > 2 files changed, 29 insertions(+), 1 deletion(-) What is the git commit id of this change in Linus's tree? thanks, greg k-h _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel