Re: sparc64 PCI BAR allocation is still problematic

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On Sun, Apr 08, 2018 at 09:44:57PM +0300, Meelis Roos wrote:
> This is a followup on the thread https://lkml.org/lkml/2015/10/7/135 and 
> corresponding https://bugzilla.kernel.org/show_bug.cgi?id=117191 entry.
> 
> I saw some sparc64 PCI allocation changes in yesterdays git and compiled 
> 4.16.0-10242-gf605ba9 on most of my sparc64 machines to test if the PCI 
> BAR allocation problems introduced in 4.3 were fixed on some of them. 
> Alas, no change at all - of the test machines, none showed any changes 
> in the error messages in "dmesg | grep BAR".
> 
> There was one test machine, T1000 with no addon cards, that did not 
> encounter any problem, before or after the recent patch. All the other 
> test machines tried still have the BAR allocation problems.
> 
> The errors seem to cluster into 3 categories:
> 
> 1. many devices fail BAR allocations
> 2. one of the Davicom Ethernet devices fails BAR allocation
> 3. Uli ISA bridge fails BAR allocation.
> 
> Full current dmesg and lspci info is also available if there is any 
> interest. I did not include it all here, which machines are interesting?

I'm interested in that info.  Can you attach it all to the bugzilla?
I can't predict ahead of time which pieces will be useful.

If you happen to have more specific information about which commit
introduced the regression, that might be helpful, but it's probably
not worth starting a new bisection yet.

Bjorn



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