From: Nicholas Johnson <nicholas.johnson-opensource@outlook.com.au> To: Bjorn Helgaas <helgaas@kernel.org> Cc: Logan Gunthorpe <logang@deltatee.com>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, Mika Westerberg <mika.westerberg@linux.intel.com>, "linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org> Subject: Possible PCI Regression Linux 5.3-rc1 Date: Wed, 24 Jul 2019 12:54:00 +0000 Message-ID: <SL2P216MB01878BBCD75F21D882AEEA2880C60@SL2P216MB0187.KORP216.PROD.OUTLOOK.COM> (raw) Hi all, I was just rebasing my patches for linux 5.3-rc1 and noticed a possible regression that shows on both of my machines. It is also reproducible with the unmodified Ubuntu mainline kernel, downloadable at [1]. Running the lspci command takes 1-3 seconds with 5.3-rc1 (rather than an imperceivable amount of time). Booting with pci.dyndbg does not reveal why. $ uname -r 5.3.0-050300rc1-generic $ time lspci -vt 1>/dev/null real 0m2.321s user 0m0.026s sys 0m0.000s If none of you are aware of this or what is causing it, I will submit a bug report to Bugzilla. I am away from 2019-07-27 to mid 2019-08-04. I will post my patches for 5.3-rc1 before I leave. If possible, please have a quick look over them while I am away for trivial changes or oopsies for me to fix, so that I can fire off another series ASAP, so that later when we do a full analysis, there are less problems. Thank you! Kind regards, Nicholas Johnson [1] https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.3-rc1/
next reply index Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-07-24 12:54 Nicholas Johnson [this message] 2019-07-24 13:38 ` Bjorn Helgaas 2019-07-24 15:48 ` Logan Gunthorpe 2019-07-25 13:21 ` Nicholas Johnson 2019-07-25 13:18 ` Nicholas Johnson 2019-07-25 15:50 ` Logan Gunthorpe 2019-08-04 8:47 ` Nicholas Johnson 2019-08-05 8:59 ` Nicholas Johnson 2019-08-05 12:34 ` Mika Westerberg 2019-08-05 14:09 ` Nicholas Johnson 2019-08-05 14:25 ` Nicholas Johnson
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