CVS commit: src/sys/arch/x86/pci

[David Young <dyoung%netbsd.org@localhost>]

Module Name:    src
Committed By:   dyoung
Date:           Fri Apr 30 21:05:27 UTC 2010

Modified Files:
        src/sys/arch/x86/pci: pci_machdep.c

Log Message:
Add an exponential back-off to the loop that tries to lock the
PCI configuration-access registers, to avoid excessive cacheline
ping-ponging.  Thanks to rmind@ for the tip.


To generate a diff of this commit:
cvs rdiff -u -r1.43 -r1.44 src/sys/arch/x86/pci/pci_machdep.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.