On Wed, Jul 24, 2019 at 12:54:00PM +0000, Nicholas Johnson wrote: > 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 wasn't aware of this; thanks for reporting it! I wasn't able to reproduce this in qemu. Can you play with "strace -r lspci -vt" and the like? Maybe try "lspci -n" to see if it's related to looking up the names?
