Messages in this thread | | | From | Andy Shevchenko <> | Date | Wed, 3 May 2017 21:42:06 +0300 | Subject | Re: `pci_apply_final_quirks()` taking half a second |
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On Sat, Apr 8, 2017 at 10:06 PM, Bjorn Helgaas <helgaas@kernel.org> wrote: > On Sat, Apr 08, 2017 at 07:00:19PM +0200, David Woodhouse wrote: >> ... >> I note it's also reading PCI_CACHE_LINE_SIZE From config space for each >> device in pci_apply_final_quirks(). How long does that take? > > I don't know, but it's pointless on modern PCIe systems where the > Cache Line Size has no effect. It'd be really nice if somebody > cleaned that up and got rid of the read itself and the useless > messages.
What I can think of is 10ms delay for PM. The laptop might be one of Intel BayTrails where we have it. But it's just a guess.
-- With Best Regards, Andy Shevchenko
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