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PCI: conditional resource-reallocation through kernel parameter pci=realloc

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Multiple attempts to dynamically reallocate pci resources have
unfortunately lead to regressions. Though we continue to fix the
regressions and fine tune the dynamic-reallocation behavior, we have not
reached a acceptable state yet.
    
This patch provides a interim solution. It disables dynamic reallocation
by default, but adds the ability to enable it through pci=realloc kernel
command line parameter.
    
Tested-by: Oliver Hartkopp <[email protected]>
Signed-off-by: Ram Pai <[email protected]>
Signed-off-by: Jesse Barnes <[email protected]>
This commit is contained in:
Ram Pai 2011-07-07 11:19:10 -07:00 • committed by Jesse Barnes
commit f483d3923d
4 changed files with 21 additions and 0 deletions
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Documentation/kernel-parameters.txt
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@ -2015,6 +2015,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
the default.
off: Turn ECRC off
on: Turn ECRC on.
realloc reallocate PCI resources if allocations done by BIOS
are erroneous.
pcie_aspm= [PCIE] Forcibly enable or disable PCIe Active State Power
Management.