On 2016/3/17 0:31, Alex Williamson wrote:
On Mon, 7 Mar 2016 15:48:34 +0800
Yongji Xie <xyjxie@xxxxxxxxxxxxxxxxxx> wrote:
The resource_alignment will releases memory resources
allocated by firmware so that kernel can reassign new
resources later on. But this will cause the problem
that no resources can be allocated by kernel if
PCI_PROBE_ONLY was set, e.g. on pSeries platform
because PCI_PROBE_ONLY force kernel to use firmware
setup and not to reassign any resources.
To solve this problem, this patch ignores
resource_alignment if PCI_PROBE_ONLY was set.
Signed-off-by: Yongji Xie <xyjxie@xxxxxxxxxxxxxxxxxx>
---
Documentation/kernel-parameters.txt | 2 ++
drivers/pci/probe.c | 3 ++-
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index d8b29ab..8028631 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -2922,6 +2922,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
windows need to be expanded.
noresize: Don't change the resources' sizes when
reassigning alignment.
+ Note that this option will not work if
+ PCI_PROBE_ONLY is set.
How would a user have any idea if this is set?
I found the PCI_PROBE_ONLY is set on pSeries, maple and
arm with "firmware" kernel parameter enabled.
So can we say: Note that this option will not work on pSeries,
maple and arm with "firmware" kernel parameter enabled?
Or do you have any suggestion?
Thanks,
Yongji Xie
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